TECHNICAL MANUAL
OPERATOR’S, ORGANIZATIONAL,
DIRECT SUPPORT AND GENERAL SUPPORT
MAINTENANCE MANUAL
(INCLUDING REPAIR PARTS AND
SPECIAL TOOLS LISTS)
FOR
SEMITRAILER, VAN: SUPPLY, 12-TON,
4-WHEEL M129A3 (2330-01-175-7379)
HEADQUARTERS, DEPARTMENT OF THE ARMY
WARNING D e f l a t e t i r e c o m p l e t e l y b e f o r e t r y i n g t o r e m o v e t i r e from wheel. F a i l u r e t o d o s o c o u l d r e s u l t i n b o d i l y i n j u r y f r o m t h e t i r e r i n g . WARNING M a i n t a i n a f i r m g r i p o n w r e n c h w h e n t o p r e v e n t i n j u r y . WARNING P l a c e p a w l o n r a t c h e t w h e n l i f t i n g p r e v e n t i n j u r y . WARNING M a k e s u r e s e m i t r a i l e r w i l l n o t r o l l j a c k i n g . S e c u r e w i t h c h o c k b l o c k s . WARNING l o w e r i n g s p a r e t i r e s p a r e t i r e t o o r s h i f t w h e n W e a r p r o t e c t i v e g o g g l e s w h e n o p e n i n g t h e a i r r e s e r v o i r d r a i n c o c k a n d a v o i d c o n t a c t w i t h t h e a i r s t r e a m . WARNING B e s u r e a l l p e r s o n n e l s t a n d c l e a r o f t h e t r a c t o r a n d s e m i t r a i l e r d u r i n g c o u p l i n g a n d u n c o u p l i n g o p e r a t i o n s . WARNING D i s c o n n e c t 1 1 0 v o l t A C e l e c t r i c a l p o w e r c a b l e f r o m t h e 1 1 0 v o l t o u t s i d e r e c e p t a c l e b e f o r e a t t e m p t i n g t o r e m o v e o r r e p l a c e f u s e s . WARNING R e m o v e a l l p o w e r f r o m v e h i c l e p r i o r t o m a k i n g a n y r e p a i r s o n e l e c t r i c a l s y s t e m . a
WARNING
D r y c l e a n i n g s o l v e n t ( P D - 6 8 0 ) i s t o x i c a n d f l a m m a b l e . U s e s o l v e n t o n l y i n a w e l l v e n t i l a t e d a r e a . A v o i d p r o l o n g e d b r e a t h i n g o f s o l v e n t v a p o r s . K e e p s o l v e n t away from flame. F l a s h p o i n t o f s o l v e n t i s 1 3 8 ° F ( 5 9 ° C ) . WARNING A d h e s i v e M I L - A - 5 0 9 2 B , T y p e 1 i s t o x i c a n d f l a m m a b l e . U s e c h e m i c a l g o g g l e s , g l o v e s a n d g o o d v e n t i l a t i o n . K e e p c o n t a i n e r c l o s e d ; k e e p s p a r k s , f l a m e s a n d h e a t away. K e e p a d h e s i v e o f f s k i n , e y e s a n d c l o t h e s . DO n o t b r e a t h e v a p o r s . WARNING D o n o t g r i n d r i v e t h e a d s o f f d u e t o a s b e s t o s h a z a r d . wARNING W h e n e v e r p o s s i b l e , u s e a c a g e f o r p r o t e c t i o n a n d o b s e r v e c a u t i o n w h e n i n f l a t i n g t i r e s . M a k e s u r e t i r e s a r e p r o p e r l y s e a t e d o n r i m s b e f o r e i n f l a t i n g . I m p r o p e r l y s e a t e d t i r e s c a n b u r s t w i t h e x p l o s i v e f o r c e s u f f i c i e n t t o c a u s e d e a t h . I f a c a g e i s n o t a v a i l a b l e , l a y t i r e d o w n w i t h t i r e r i n g s i d e t o w a r d g r o u n d b e f o r e i n f l a t i n g . WARNING D o n o t a t t e m p t t o o p e r a t e t h e s e m i t r a i l e r w i t h t h e s p r i n g b r a k e s c a g e d e x c e p t t o m o v e t h e v e h i c l e o u t o f t h e t r a v e l e d p o r t i o n o f t h e h i g h w a y i n t h e e v e n t o f a n a i r s y s t e m f a i l u r e . CAUTION
HEADQUARTERS DEPARTMENT OF THE ARMY
\Vashington, D.C., 18 .Ju/y, 1986
TECHNICAL MANUAL No. 9-2330-374-14&P
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT AND
GENERAL SUPPORT MAINTENANCE MANUAL
(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS) FOR
SEMITRAILER, VAN: SUPPLY, 12-TON, 4-WHEEL,
M129A3 (2330-01-175-7379)
Current as of 20 June 1986
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual. I f y o u f i n d a n y m i s t a k e s o r i f y o u k n o w o f a w a y t o i m p r o v e t h e p r o c e d u r e s , p l e a s e l e t u s k n o w . M a i l y o u r l e t t e r D A Form 2028 (Recommended Changes to Publications and B l a n k F o r m s ) , o r D A F o r m 2 0 2 8 - 2 , l o c a t e d i n t h e b a c k o f t h i s m a n u a l , d i r e c t t o : Commander, US Army
Tank-Automotive Command, ATTN: AMSTA-MB, Warren, MI
48397-5000. A r e p l y w i l l b e f u r n i s h e d t o y o u . Page CHAPTER 1. INTRODUCTION S e c t i o n S e c t i o n S e c t i o n General Information . . . . Equipment Description . . . . T e c h n i c a l P r i n c i p l e s o f O p e r a t i o n . . . . 1-1 1-2 1-5 I . I I . I I I . OPERATING INSTRUCTIONS CHAPTER 2 . D e s c r i p t i o n a n d U s e o f O p e r a t o r ’ s C o n t r o l s a n d I n d i c a t o r s . . . . Operator/Crew Preventive Maintenance Checks
and Services . . . . O p e r a t i o n U n d e r U s u a l C o n d i t i o n s . . . . O p e r a t i o n U n d e r U n u s u a l C o n d i t i o n s . . . . S e c t i o n I . 2-1 2 - 9 2-17 2-26 S e c t i o n II . S e c t i o n S e c t i o n I I I . I V .
CHAPTER 3 . OPERATOR MAINTENANCE INSTRUCTIONS
3-1 3-5 3-9 S e c t i o n S e c t i o n S e c t i o n I . I I . I I I . Lubrication Instructions . . . . O p e r a t o r T r o u b l e s h o o t i n g P r o c e d u r e s . . . . Maintenance Procedures . . . . i
Page CHAPTER 4 . S e c t i o n I . S e c t i o n I I . S e c t i o n I I I . S e c t i o n I V . S e c t i o n V . S e c t i o n V I . S e c t i o n V I I . S e c t i o n V I I I . S e c t i o n I X . S e c t i o n X . S e c t i o n X I . S e c t i o n X I I . S e c t i o n X I I I . CHAPTER S e c t i o n S e c t i o n S e c t i o n S e c t i o n S e c t i o n S e c t i o n APPENDIX APPENDIX APPENDIX APPENDIX APPENDIX APPENDIX S e c t i o n S e c t i o n Group 5 . I . I I . I I I . I V . V . V I . A. B. C. D. E. F . I . I I . 06
ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
R e p a i r P a r t s , S p e c i a l T o o l s , TMDE and Support Equipment . . . Service Upon Receipt of Materiel . . . . O r g a n i z a t i o n a l P r e v e n t i v e M a i n t e n a n c e C h e c k s a n d
Services (PMCS) . . . . O r g a n i z a t i o n a l T r o u b l e s h o o t i n g P r o c e d u r e s . . . . Maintenance of Electrical System . . . . Maintenance of Brakes . . . . Maintenance of Wheels, Hubs and Drums . . . . Maintenance of Spare Tire Carrier . . . . Maintenance of Landing Legs . . . . Maintenance of Body . . . . Maintenance of Miscellaneous Body Accessories . . . . Preparation for Storage and Shipment . . . . Maintenance Under Unusual Conditions . . . .
DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
R e p a i r P a r t s , Special Tools, TMDE and Support Equipment . . . Maintenance of Axle Assembly . . . . Maintenance of Brakes . . . . Maintenance of Frame . . . . Maintenance of Suspension . . . . R e b u i l d o f t h e D e c k . . . .
REFERENCES . . . . MAINTENANCE ALLOCATION CHART . . . . COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LIST . . . . ADDITIONAL AUTHORIZATION LIST . . . . EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST. . . REPAIR PARTS AND SPECIAL TOOLS LIST . . . .
I n t r o d u c t i o n . . . . R e p a i r P a r t s L i s t ELECTRICAL SYSTEM 0608 Electrical System . . . . 0 6 0 8 V a n E l e c t r i c a l S y s t e m ( s h e e t 1 o f 3 ) . . 0 6 0 8 V a n E l e c t r i c a l S y s t e m ( s h e e t 2 o f 3 ) . . 0 6 0 8 V a n E l e c t r i c a l S y s t e m ( s h e e t 3 o f 3 ) . . 0608 Electrical Plates . . . . 0608 Circuit Breaker and Switch Box . . . . 0608 Dome Light Switches . . . . 0 6 0 8 V e n t i l a t i n g F a n . . . . 0609 Clearance Light.. . . . 0 6 0 9 1 2 V o l t T a i l l i g h t . . . . 0 6 0 9 2 4 V o l t C o m p o s i t e T a i l l i g h t . . . . 0609 110 Volt Dome Light . . . . 0609 24 Volt Dome Light . . . . 0613 Chassis Electrical System Components
(sheet 1 of 2) . . . . I l l u s / F i g u r e 1 2 2 2 3 4 5 6 7 8 9 10 11 12 4-1 4 - 2 4 - 3 4 - 6 4-14 4-44 4-65 4-71 4-74 4-79 4-91 4-95 4-97 5-1 5-1 5 - 6 5 - 7 5 - 9 5-13 A-1 B-1 C-1 D-1 E-1 F-1 F-1
Group 11 Group 12 Group 13 Group 15 0 6 1 3 C h a s s i s E l e c t r i c a l S y s t e m C o m p o n e n t s (sheet 2 of 2) . . . . REAR AXLE
1100 Axle Assembly (serial numbers
1HzV2920XE1007033 to 1HZV29201E1007439) . . . . 1100 Axle Assembly (serial numbers
1HZV29201E1007440 to 1HzV29208E1007709) . . . . BRAKES
1202 Brake Shoes (serial numbers
1HZV2920XE1007033 to 1HZV29201E1007439) . . . . 1202 Brake Shoes (serial numbers
1HzV29201E1007440 to 1HZV29208E1007709) . . . . 1 2 0 6 S l a c k A d j u s t e r . . . . 1208 Air Brake Chamber . . . . 1208 Brake System (sheet 1 of 2) . . . . 1208 Brake System (sheet 2 of 2) . . . . WHEELS
1311 Hub and Brake Drum.... . . . 1311 Tire and Wheel Assembly . . . . FRAME, TOWING ATTACHMENTS AND DRAWBARS
1501 Mud Flap . . . . 1501 Chock Block . . . . 1501 Step . . . . 1501 Ladder Assembly . . . .
1501 Float Pad Assembly (Ground Board) . . . . .
1504 Spare Tire Carrier Assembly . . . . 1507 Landing Legs . . . . SPRINGS AND SHOCK ABSORBERS
1607 Suspension . . . . BODY ASSEMBLY
1800 Van Fasteners . . . . 1801 Right Door Assembly . . . . 1801 Left Door Assembly . . . . 1801 Door Holdbacks . . . . 1801 Retractable Sash . . . . 1801 Stationary Sash . . . . 1805 Floor . . . .
Group 22 BODY CHASSIS AND ACCESSORY ITEMS
2202 Reflectors . . . . 2210 Data Plate . . . . Group 16 Group 18 I l l u s / F i g u r e 12 13 14 15 16 17 18 19 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Page
APPENDIX G. MANUFACTURED ITEMS . . . G-1 APPENDIX H. TORQUE LIMITS . . . H-1
F i g u r e 1 - 1 . S e m i t r a i l e r , M 1 2 9 A 3 , l e f t f r o n t v i e w
CHAPTER 1 INTRODUTION
SECTION 1. GENERAL INFORMATION
1-1. SCOPE
a . Type of Manual. O p e r a t o r ’ s , O r g a n i z a t i o n a l , D i r e c t S u p p o r t a n d G e n e r a l S u p p o r t M a i n t e n a n c e M a n u a l ( i n c l u d i n g R e p a i r P a r t s a n d S p e c i a l T o o l s L i s t s ) .
b . Model Number and Equipment Name.
M 1 2 9 A 3 S e m i t r a i l e r , V a n : S u p p l y , 1 2 - t o n , 4 - w h e e l c . Purpose of Equipment. T h e s e m i t r a i l e r s a r e i n t e n d e d m i l i t a r y s u p p l i e s .
d . S p e c i a l L i m i t a t i o n s o n E q u i p m e n t . Do not exceed the l i m i t a t i o n o f t h e s e m i t r a i l e r . T h e s e m i t r a i l e r i s d e s i g n e d h a r d - s u r f a c e d r o a d s w i t h l o a d s U P t o 1 2 - t o n s ( 1 0 , 9 0 0 k g ) a t
f o r u s e i n t r a n s p o r t i n g
load and speed
to be towed over smooth, speeds as high as 50 mph (80 km/h). I t c a n a l s o b e t o w e d - o v e r u n i m p r o v e d r o a d s , t r a i l s a n d o p e n r o l l i n g t e r r a i n w i t h l o a d s u p t o 1 2 - t o n s ( 1 0 , 9 0 0 k g ) a t a s u s t a i n e d s p e e d o f 2 0 m p h ( 3 2 k m / h ) . T h e s e m i t r a i l e r s h o u l d b e o p e r a t e d o n l y a f t e r b e i n g s e r v i c e d a n d e q u i p p e d
f o r e x i s t i n g c l i m a t i c c o n d i t i o n s .
1 - 2 . MAINTENANCE FORMS AND RECORDS
Department of the Army forms and procedures used for equipment maintenance will be
those prescribed by DA Pam 738-750, The Army Maintenance Management System (TAMMS).
1 - 3 . DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE
Refer to TM 750-244-6, Procedures for Destruction of Equipment to Prevent Enemy Use ( U s .
1 - 4 .
See
1 - 5 .
Army Tank-Automotive Command).
PREPARATION FOR STORAGE OR SHIPMENT
C h a p t e r 4 f o r s t o r a g e a n d s h i p m e n t i n f o r m a t i o n .
R E P O R T I N G E Q U I P M E N T R E C O M M E N D A T I O N S ( E I R S )
I f y o u r s e m i t r a i l e r n e e d s i m p r o v e m e n t , l e t u s k n o w . Send us an EIR. You, the u s e r , a r e t h e o n l y o n e w h o c a n t e l l u s w h a t y o u d o n ’ t l i k e a b o u t y o u r e q u i p m e n t . L e t u s k n o w w h y y o u d o n ’ t l i k e t h e d e s i g n o r p e r f o r m a n c e . Put it on an SF368
( Q u a l i t y D e f i c i e n c y R e p o r t ) . M a i l i t t o C o m m a n d e r , U . S . A r m y T a n k - A u t o m o t i v e Command, Attn: AMSTA-MP, Warren, MI 48397-5000. W e ’ l l s e n d y o u a r e p l y .
SECTION II. EQUIPMENT DESCRIPTION Page E q u i p m e n t C a p a b i l i t i e s a n d F e a t u r e s . . . 1-2 Equipment Data . . . 1-3 L o c a t i o n a n d D e s c r i p t i o n o f M a j o r C o m p o n e n t s . . . . . . . . 1-3
1 - 6 . EQUIPMENT CAPABILITIES AND FEATURES
a . C a p a b i l i t i e s . ( 1 ) E a c h s e m i t r a i l e r i s t o b e t o w e d b y a 5 - t o n , 6 X 6 t r u c k t r a c t o r M 5 2 o r s i m i l a r v e h i c l e e q u i p p e d w i t h f i f t h w h e e l , a i r s u p p l y a n d a 2 4 v o l t e l e c t r i c a l s y s t e m . ( 2 ) I f a t o w i n g v e h i c l e w i t h a 2 4 v o l t e l e c t r i c a l s y s t e m i s n o t a v a i l a b l e , a n a l t e r n a t e t o w i n g v e h i c l e w i t h a 1 2 v o l t e l e c t r i c a l s y s t e m m a y b e u s e d . b . F e a t u r e s . ( 1 ) (2) (3) (4) (5) ( 6 ) (7) ( 8 ) (9) (10) (11) (12) (13) (14) 1 2 t o n , 4 - w h e e l s u p p l y v a n s e m i t r a i l e r . C r o s s - c o u n t r y p a y l o a d 2 4 , 0 0 0 l b s a t 2 0 m p h ( 1 0 , 9 0 0 k i l o g r a m s a t 3 2 k m / h ) . H i g h w a y p a y l o a d 2 4 , 0 0 0 l b s a t F i f t h w h e e l p l a t e a n d k i n g p i n T w o r e a r a x l e s o n l e a f - s p r i n g F o o t - t y p e r e t r a c t a b l e l a n d i n g 50 mph (10,900 kilograms at 80 km/h). c o u p l i n g . s u s p e n s i o n . l e g s , f o r f r o n t e n d s u p p o r t . S p a r e t i r e o n w i n c h - t y p e s p a r e t i r e c a r r i e r . C h o c k b l o c k s f o r p a r k i n g , c h a i n e d t o c h a s s i s . T w o f l o a t p a d s , f o r l a n d i n g l e g u s e o n s o f t g r o u n d . T o w i n g v e h i c l e s u p p l i e s b r a k e a i r p r e s s u r e a n d c o n t r o l o f b r a k e s . C h a s s i s f r a m e w e l d e d i n t o s i n g l e i n t e g r a l u n i t .
Body has seven windows with blackout covers.
F r o n t w i n d o w i s s t a t i o n a r y . S i x w i n d o w s ( t h r e e e a c h s i d e o f t r a i l e r ) a r e r e t r a c t a b l e .
A d d i t i o n a l 1 1 0 V A C e l e c t r i c a l s y s t e m f o r d o m e l i g h t s , w a l l r e c e p t a c l e s , c i r c u i t b r e a k e r s a n d s w i t c h b o x .
1 - 7 . LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (1) (2) (3) (4) (5) ( 6 ) (7)
CHASSIS FRAME AND BODY FRAME. C o n s t r u c t e d o f s t e e l . I t i n c l u d e s t h e w e l d e d u p p e r f i f t h w h e e l p l a t e a n d k i n g p i n . SUSPENSION SYSTEM. C o n s i s t s o f t r u n n i o n t u b e , s p r i n g s a n d a x l e a s s e m b l y .
VAN BODY. Has two doors in
r e a r . S t e p l a d d e r h a n g s o n l e f t
d o o r . Equipped with windows.
LANDING LEG. M a n u a l l y e x t e n d e d w h e n s e m i t r a i l e r i s u n h o o k e d f r o m t o w i n g v e h i c l e a n d
m a n u a l l y r e t r a c t e d w h e n t r u c k t r a c t o r i s h o o k e d u p . T w o -speed gearbox for ease of h a n d l i n g . KINGPIN. C o n n e c t s s e m i t r a i l e r t o f i f t h w h e e l o f t r u c k t r a c t o r . F i g u r e 1 - 3 . Semitrailer, M129A3, r i g h t r e a r v i e w
SPARE WHEEL AND TIRE CARRIER. C a n b e l o w e r e d o r r a i s e d b y u s i n g s p a r e t i r e c a r r i e r
12 VOLT
o p e r a t i n g s h a f t .
AND 24 VOLT LIGHTS. C o n t a i n b a c k - u p , s t o p , b l a c k o u t a n d c l e a r a n c e l i g h t s .
1 - 8 . EQUIPMENT DATA
a . S e m i t r a i l e r .
Towing vehicle . . . .. . . 5 ton 6x6 T o w i n g f a c i l i t i e s . . . K i n g p i n
Kingpin to front of chassis . . . 2 ft 6 in. (76cm) K i n g p i n t o l a n d i n g l e g . . . 6 f t 5 - 1 / 2 i n . ( 1 9 7 c m ) D i m e n s i o n s o v e r a l l : Length . . . 2 8 f t 8 - 1 / 4 i n . ( 8 7 4 c m ) Width . . . 7 f t 4 - 1 / 2 i n . ( 2 2 5 c m ) H e i g h t . . . 12 ft (366 cm) F l o o r h e i g h t ( e m p t y ) . . . 4 f t 1 0 - 1 / 2 i n . ( 1 4 9 c m ) F l o o r h e i g h t ( l o a d e d ) . . . . 4 f t 7 - 1 / 4 i n . ( 1 4 0 c m ) U p p e r f i f t h w h e e l p l a t e h e i g h t ( l o a d e d ) . . . . . 3 f t 1 0 i n . ( 1 1 7 c m ) T r a c k ( t r e a d c e n t e r - t o - c e n t e r o f t i r e s ) . . . 6 ft (183 cm) Empty weight . . . .... 15,400 lbs (7,000 kg) 1-3
P a y l o a d : H a r d s u r f a c e r o a d s . . . 2 4 , 0 0 0 l b s ( 1 0 , 9 0 0 k g ) C r o s s c o u n t r y . . . 2 4 , 0 0 0 l b s ( 1 0 , 9 0 0 k g ) C e n t e r o f g r a v i t y f r o m g r o u n d ( e m p t y ) . . . 4 ft (122 cm) C e n t e r o f g r a v i t y f o r w a r d o f s u s p e n s i o n : Loaded . . . 8 ft 1 in. (246 cm) Empty . . . 6 f t 2 - 1 / 2 i n . ( 1 8 9 c m ) A n g l e o f d e p a r t u r e ( l o a d e d ) . . . 50 deg b . E l e c t r i c a l S y s t e m . V o l t a g e . . . 12, 24 and 110 Dome Lights: 2 4 v o l t ( f o u r ) . . . 21 cp 1 1 0 v o l t A C ( e i g h t ) . . . 6 0 w a t t Lamps: R i g h t a n d l e f t t a i l l i g h t a s s e m b l i e s - 1 2 v o l t : S e r v i c e t a i l l i g h t l a m p . . . 15 cp S e r v i c e s t o p l i g h t l a m p . . . 32 cp T u r n l i g h t l a m p . . . 32 cp R i g h t a n d l e f t c o m p o s i t e l i g h t a s s e m b l i e s - 2 4 v o l t : B l a c k o u t m a r k e r a n d s t o p l i g h t l a m p s . . . 3 cp S t o p a n d t u r n s i g n a l l i g h t l a m p . . . 32 cp S e r v i c e t a i l l i g h t l a m p . . . 3 cp c . A x l e s . Type . . . T u b u l a r Q u a n t i t y . . . 2
Manufacturer . . . Standard Forge & Axle Co. (Serial Numbers 1HZV2920XE1007033 through 1HZV29201E1007439)
Manufacturer . . . Dana Co. (Serial Numbers 1HZV29201E1007440 through 1HZV29208E1007709) d . B r a k e s . Actuation . . . Air I n t e r n a l b r a k e s . . . S - c a m , t w o - s h o e , d o u b l e a n c h o r , e x p a n d i n g , s e l f -c e n t e r i n g e . Wheels. Type . . . D u a l , m i l i t a r y d i s k Manufacturer . . . Budd Co.
Rim Size . . . 20 x 7.5 W h e e l b e a r i n g s :
Type . . . T a p e r e d r o l l e r Manufacturer . . . Timken
f . T i r e s . Q u a n t i t y . . . 8 S i z e . . . 11.00 X 20 Type . . . NDCC military P l y . . . 12 T i r e i n f l a t i o n : H i g h w a y d r i v i n g . . . 6 0 p s i C r o s s - c o u n t r y d r i v i n g . . . 4 0 p s i g . S p a r e T i r e C a r r i e r . Type . . . O n e m a n , c a b l e l i f t Make . . . Nash
Operated by . . . Wheel nut wrench
h . Landing Leg. Type . . . V e r t i c a l , t w o l e g s w i t h f e e t Manufacturer . . . Westran L e n g t h t o t o p o f f l o o r : R e t r a c t e d . . . 3 ft 9 in. (114 cm) Extended . . . 5 ft (152.4 cm) operation . . . Handcrank, two-speed W i d t h a t f e e t ( c e n t e r t o c e n t e r ) . . . 4 f t 2 - 5 / 1 6 i n . ( 1 2 8 c m )
S e c t i o n I I I . TECHNICAL PRINCIPLES OF OPERATION
1 - 9 . SYSTEMS OF THE M129A3 SEMITRAILER
(1) ( 2 ) (3) (4) ELECTRICAL SYSTEM. C o n n e c t s t o t o w i n g v e h i c l e e l e c t r i c a l s y s t e m t o a c t i v a t e t h e 1 2 o r 2 4 v o l t s y s t e m . I n c l u d e s 1 2 v o l t , 2 4 v o l t a n d 1 1 0 v o l t w i r i n g f o r o p e r a t i n g t a i l l i g h t s , c l e a r a n c e l i g h t s , d o m e l i g h t s , a n d v a n r e c e p t a c l e s . T h e 1 1 0 v o l t s e r v i c e i s c o n n e c t e d t o a n e x t e r n a l p o w e r s u p p l y .
BRAKE SYSTEM. A i r b r a k e s y s t e m f o r s e r v i c e , emergency and parking brake o p e r a t i o n . I n c l u d e s a i r r e s e r v o i r , g l a d h a n d s , drain cock, and emergency r e l a y v a l v e , a i r c h a m b e r s , l i n e s a n d f i t t i n g s .
SERVICE BRAKE SYSTEM. A i r p r e s s u r e a c t i v a t e s t h e a i r c h a m b e r s , w h i c h p u s h t h e s l a c k a d j u s t e r s . T h e s l a c k a d j u s t e r s t u r n t h e c a m s h a f t s c a u s i n g t h e brake shoes to expand against the brake drum.
SUSPENSION SYSTEM. I n c l u d e s s p r i n g s , u - b o l t s , a x l e s a n d t r u n n i o n t u b e f o r e a s e o f t r a v e l o n i m p r o v e d a n d u n i m p r o v e d r o a d s .
CHAPTER 2
OPERATING INSTRUCTIONS
S e c t i o n I . DESCRIPTION AND USE OF OPERATOR’s
CONTROLS AND INDICATORS
Page A i r R e s e r v o i r D r a i n C o c k . . . 2 - 3 Brake Air Hose Couplings . . . 2 - 3 Chock Blocks . . . ... ... . .... .. 2 - 5 Dome Light Switches . . . ... .. 2 - 2 Dummy Couplings . . . 2 - 3 F l o a t P a d s ( G r o u n d B o a r d A s s e m b l i e s ) . . . 2-5 I n t e r v e h i c u l a r C a b l e R e c e p t a c l e s . . . 2 - 2
Kingpin . . . ... . . . 2 - 6
Landing Leg Handcrank . . . 2-4 S e r v i c e L i g h t s a n d C h a s s i s E l e c t r i c a l W i r i n g . . . 2 - 7 S p a r e T i r e C a r r i e r O p e r a t i n g S h a f t . . . 2 - 4 Stepladder and Retractable Step . . . 2-6 Van Body . . . .. . . . .. ... . . ... . . .. . . . ... . 2 - 8 110 Volt AC Body Lights and Wiring . . . 2-8 110 Volt AC External Receptacles . . . 2-2 12 Volt Body Lights and Wiring . . . ... ... 2-7 2 4 V o l t B o d y L i g h t s a n d W i r i n g . . . 2 - 8 1 1 0 V o l t S w i t c h B o x a n d C i r c u i t B r e a k e r L o a d C e n t e r . . . 2-1 2 4 V o l t V e n t i l a t i n g F a n . . . . . . . . . 2 - 7
Windows . . . ... . . . . . ... .... 2 - 9
2 - 1 . 110 VOLT SWITCH BOX AND CIRCUIT BREAKER LOAD CENTER
a . Purpose. P r o t e c t s 1 1 0 v o l t e l e c t r i c a l c i r c u i t s .
b . L o c a t i o n . One mounted above the o t h e r i n s i d e o f v a n o n r i g h t s i d e o f f r o n t w i n d o w ( f i g u r e 2 - 1 ) .
c . S w i t c h BO X ( 1 ) . C o n t a i n s d o u b l e -p o l e , s i n g l e - t h r o w k n i f e s w i t c h ( 2 ) a n d two 60 amp fuses (3).
d . C i r c u i t B r e a k e r L o a d C e n t e r ( 4 ) . C o n t a i n s f o u r 2 0 a m p s w i t c h t y p e c i r c u i t b r e a k e r s ( 5 ) .
F i g u r e 2 - 1 . 110 volt switch box and
c i r c u i t b r e a k e r l o a d c e n t e r
F i g u r e 2 - 2 . Dome light switches
Figure 2-3. 1 1 0 v o l t e x t e r n a l receptacle
2 - 2 . DOME LIGHT SWITCHES
a. 1 1 0 V o l t D o m e L i g h t S w i t c h ( 1 ) . C o n t r o l s e i g h t d o m e l i g h t s i n s e m i t r a i l e r b o d y ( f i g u r e 2 - 2 ) . b . 2 4 V o l t D o m e L i g h t S w i t c h ( 2 ) . — — C o n t r o l s f o u r d o m e l i g h t s i n s e m i t r a i l e r body . c . L o c a t i o n . I n s i d e o f v a n o n t h e r e a r w a l l . d . S w i t c h P o s i t i o n s . Both switches have "ON" and "OFF" positions.
2 - 3 . 110 VOLT AC EXTERNAL RECEPTACLE
a . U s e d f o r c o n n e c t i n g a n e x t e r n a l 1 1 0 - v o l t A C e l e c t r i c a l s u p p l y t o s e m i t r a i l e r ( 1 , f i g u r e 2 - 3 ) . b . T w o - p i n t y p e . c. M o u n t e d o n t h e f r o n t o f s e m i t r a i l e r b o d y a p p r o x i m a t e l y m i d w a y up.
2 4 . INTERVEHICULAR CABLE RECEPTACLES
d. I n c l u d e s d u s t c o v e r o n c h a i n . —
Figure 2-4. I n t e r v e h i c u l a r c a b l e receptacles
2 - 5 . BRAKE AIR HOSE COUPLINGS
a . Two air hose couplings tagged SERVICE (1, figure 2-5) and EMERGENCY (2).
b . U s e d f o r c o n n e c t i n g t h e i n t e r v e h i c u l a r h o s e s f r o m t h e t o w i n g v e h i c l e t o t h e s e m i t r a i l e r . c . A f t e r c o n n e c t i o n o f h o s e s , t h e s e r v i c e b r a k e s o n t h e s e m i t r a i l e r c a n b e c o n t r o l l e d b y t h e b r a k e c o n t r o l s o n t h e t o w i n g v e h i c l e . d . L o c a t e d o n f r o n t c r o s s m e m b e r o f t h e c h a s s i s f r a m e . 2 - 6 . DUMMY COUPLINGS a . T W O d u m m y c o u p l i n g s ( 3 , f i g u r e 2 - 5 )
to be fitted to the SERVICE and EMERGENCY a i r h o s e c o u p l i n g s .
b . Connect when brake air hose
c o u p l i n g s a r e n o t c o n n e c t e d t o t h e t o w i n g v e h i c l e . c . U s e d t o p r e v e n t d i r t a n d m o i s t u r e f r o m e n t e r i n g t h e b r a k i n g s y s t e m . d . C h a i n e d t o b r a c k e t s w e l d e d t o t h e f r o n t c r o s s m e m b e r o f t h e c h a s s i s f r a m e .
2 - 7 . AIR RESERVOIR DRAIN COCK
WARNING
Wear protective goggles when o p e n i n g a i r r e s e r v o i r d r a i n c o c k ( 1 , f i g u r e 2 - 6 ) a n d a v o i d c o n t a c t w i t h t h e a i r s t r e a m . a . U s e d t o r e l i e v e a i r p r e s s u r e i n t h e s e m i t r a i l e r b r a k i n g s y s t e m . b . U s e d f o r d r a i n a g e o f m o i s t u r e — c o l l e c t e d i n a i r r e s e r v o i r .
F i g u r e 2 - 5 . Brake air hose couplings
F i g u r e 2 - 6 . A i r r e s e r v o i r d r a i n c o c k
2 - 8 . SPARE TIRE CARRIER OPERATING SHAFT
F i g u r e 2 - 7 . O p e r a t i n g s p a r e t i r e
F i g u r e 2 - 8 . Landing leg handcrank
a . U s e d f o r r a i s i n g a n d l o w e r i n g s p a r e t i r e .
b . O p e r a t e d w i t h l u g n u t w r e n c h ( 1 , f i g u r e 2 - 7 ) .
c . A metal cable is wound on an
o p e r a t i n g s h a f t t o l i f t t h e t i r e t o c a r r y i n g p o s i t i o n . d . R o t a t i n g s h a f t c l o c k w i s e r a i s e s — s p a r e t i r e ( 2 ) t o t h e c a r r y i n g p o s i t i o n . e . C o u n t e r c l o c k w i s e r o t a t i o n l o w e r s s p a r e t i r e ( 2 ) t o t h e g r o u n d . f . L o c a t e d o n r i g h t h a n d s i d e o f s e m i t r a i l e r a n d a t t a c h e d t o t h e m a i n m e m b e r o f t h e t i r e c a r r i e r .
2 - 9 . LANDING LEG HANDCRANK
a . U s e d t o r a i s e a n d l o w e r l a n d i n g l e g s . b . R o t a t i n g h a n d c r a n k ( 1 , f i g u r e 2 -8 ) c l o c k w i s e l o w e r s l a n d i n g l e g s ( 2 ) f o r p a r k i n g s e m i t r a i l e r . c . C o u n t e r c l o c k w i s e r o t a t i o n r a i s e s l e g s t o t o w i n g p o s i t i o n . d . P u s h i n g o p e r a t i n g s h a f t ( 3 ) i n engages low speed gear for ease and speed i n r a i s i n g o r l o w e r i n g l e g s b e t w e e n g r o u n d a n d f u l l u p p o s i t i o n . e . P u l l i n g o p e r a t i n g s h a f t ( 3 ) o u t e n g a g e s h i g h s p e e d g e a r f o r r a i s i n g o r l o w e r i n g l e g s ( 2 ) w h e n s e m i t r a i l e r i s u n d e r l o a d . f . L o c a t e d o n r i g h t s i d e o f s e m i t r a i l e r .
2 - 1 0 . FLOAT PADS (GROUND BOARD ASSEMBLIES) a . T w o f l o a t p a d s ( 1 , f i g u r e 2 - 9 ) a r e p r o v i d e d f o r p l a c i n g u n d e r l a n d i n g l e g f e e t t o k e e p t h e m f r o m s i n k i n g i n t o s o f t g r o u n d . b . S t o r e d i n b r a c k e t s ( 2 ) w e l d e d t o f r a m e . c . S e c u r e d t o l a n d i n g l e g b r a c k e t w i t h c h a i n s ( 3 ) . 2 - 1 1 . CHOCK BLOCKS a . O n e c h o c k b l o c k ( 1 , f i g u r e 2 - 1 0 ) l o c a t e d o n e a c h s i d e o f s e m i t r a i l e r . b . D e p e n d i n g u p o n t h e t e r r a i n , p l a c e c h o c k b l o c k s ( 1 ) f i r m l y b e h i n d o r f o r w a r d o f w h e e l s o n e a c h s i d e o f s e m i t r a i l e r . c . H e l p s k e e p s e m i t r a i l e r f r o m m o v i n g w h e n t r u c k t r a c t o r i s u n h o o k e d o r w h e n t h e u n i t i s p a r k e d o n a h i l l . d . C h a i n ( 2 ) h o l d s c h o c k b l o c k ( 1 ) t o s e m i t r a i l e r t o k e e p i t f r o m b e i n g l o s t .
e . Stowage bracket (3) stows chock
b l o c k ( 1 ) w h e n n o t i n u s e .
F i g u r e 2 - 9 . Float pad (board assembly)
F i g u r e 2 - 1 0 . Chock block
STEP
F i g u r e 2 - 1 1 . Stepladder step
2 - 1 2 . STEPLADDER AND RETRACTABLE
a . The M129A3 semitrailer van has a
s t e p l a d d e r ( 1 , f i g u r e 2 - 1 1 ) t o a i d i n c l i m b i n g i n a n d o u t o f v a n b o d y . b . T h e s t e p l a d d e r ( 1 ) h a n g s o n l e f t r e a r d o o r ( 2 ) w h e n n o t i n u s e . I t i s h e l d i n p l a c e b y r e m o v a b l e p i n s f a s t e n e d o n a c h a i n t o t h e b o d y . c . A c h a i n h o l d s u p r e t r a c t a b l e — s t e p ( 3 ) w h e n n o t i n u s e . a n d r e t r a c t a b l e 2 - 1 3 . K I N G P I N a . U s e d t o c o u p l e s e m i t r a i l e r t o t o w i n g v e h i c l e . b . P r o t r u d e s f r o m t h e c e n t e r o f t h e f i f t h w h e e l u p p e r p l a t e o f t h e s e m i t r a i l e r ( 1 , f i g u r e 2 - 1 2 ) . F i g u r e 2 - 1 2 . Kingpin
2 - 1 4 . 24 VOLT VENITLATING FAN a . The fan (1, f i g u r e 2 - 1 3 ) p r o v i d e s v e n t i l a t i o n f o r t h e v a n . b . T o g g l e s w i t c h ( 2 ) a b o v e f a n c o n t r o l s o p e r a t i o n . c . L o c a t e d i n r e a r u p p e r l e f t c o r n e r — o f v a n . F i g u r e 2 - 1 3 . 24 volt v e n t i l a t i n g f a n
2 - 1 5 . SERVICE LIGHTS AND CHASSIS ELECTRICAL WIRING
a . 1 2 v o l t a n d 2 4 v o l t c h a s s i s l i g h t s a s f o l l o w s : — 1 2 v o l t s t o p , t u r n a n d t a i l l i g h t ( t w o u s e d ) 2 4 v o l t s t o p a n d t u r n s i g n a l , t a i l b l a c k o u t m a r k e r a n d c o m p o s i t e l i g h t a s s e m b l y ( t w o u s e d ) b . A 1 2 v o l t r e c e p t a c l e a n d a 2 4 v o l t r e c e p t a c l e o n f r o n t c u r r e n t t o c h a s s i s w i r i n g f r o m t o w i n g v e h i c l e . b l a c k o u t s t o p , crossmember supplies c . C u r r e n t i s r o u t e d t o v a n b o d y w i r i n g 1 2 v o l t a n d 2 4 v o l t b o d y r e c e p t a c l e l o c a t e d o n r i g h t l o n g i t u d i n a l f r a m e r a i l . 2 - 1 6 . a . b .
12 VOLT BODY LIGHTS AND WIRING
C i r c u i t r e c e i v e s p o w e r t h r o u g h 1 2 v o l t r e c e p t a c l e o n r i g h t f r a m e r a i l . E l e v e n 1 2 v o l t b o d y c l e a r a n c e l i g h t s c o n s i s t i n g o f : T w o a m b e r s e r v i c e c l e a r a n c e l i g h t s ( f r o n t ) T w o a m b e r s e r v i c e c l e a r a n c e l i g h t s ( f r o n t - s i d e ) T w o r e d s e r v i c e c l e a r a n c e l i g h t s ( r e a r ) T w o r e d s e r v i c e c l e a r a n c e l i g h t s ( r e a r - s i d e ) T h r e e r e d t r i p l e l a m p c l u s t e r ( r e a r ) 2 - 7
2 - 1 7 . a . — b . — . . . c . — . . 2 - 1 8 . a . — b . midway c . — . . . . .
24 VOLT BODY LIGHTS AND WIRING
C i r c u i t r e c e i v e s p o w e r t h r o u g h 2 4 v o l t b o d y e l e c t r i c a l s y s t e m F o u r d o m e l i g h t s w i t h s w i t c h V e n t i l a t i n g f a n w i t h s w i t c h F o u r 2 4 v o l t c l e a r a n c e l i g h t s 2 4 v o l t r e c e p t a c l e o n r i g h t f r a m e r a i l . c o n s i s t s o f : 2 4 v o l t c l e a r a n c e l i g h t s c o n s i s t o f : TW O a m b e r s e r v i c e c l e a r a n c e l i g h t s ( t o p f r o n t s i d e s ) TW O r e d s e r v i c e c l e a r a n c e l i g h t s ( t o p r e a r s i d e s )
110 VOLT AC BODY LIGHT8 AND WIRING
1 1 0 v o l t i s f r o m e x t e r n a l s o u r c e .
C i r c u i t r e c e i v e s p o w e r t h r o u g h 1 1 0 v o l t r e c e p t a c l e l o c a t e d a p p r o x i m a t e l y u p o n f r o n t o f v a n b o d y .
1 1 0 v o l t b o d y e l e c t r i c a l s y s t e m c o n s i s t s o f :
C i r c u i t b r e a k e r l o a d c e n t e r w i t h f o u r 2 0 a m p b r e a k e r s Switch box with two 60 amp fuses
E i g h t 1 1 0 v o l t d o m e l i g h t s ( v a n c e i l i n g ) D o m e l i g h t s w i t c h ( r e a r i n s i d e v a n w a l l ) S i x t e e n 1 1 0 v o l t b o d y w a l l r e c e p t a c l e s ; e i g h t o n e a c h 2 - 1 9 . VAN BODY a . Two doors r e a r o f b o d y . s i d e ( n e x t t o c e i l i n g ) ( 1 , f i g u r e 2 - 1 4 ) a t b . D o o r l o c k , l a t c h a n d h a n d l e ( 2 ) o n r i g h t r e a r d o o r . c . D e t a c h a b l e s t e p l a d d e r ( 3 ) w i t h a d j u s t a b l e l e g s m o u n t e d d o o r . U s e d i n e n t e r i n g s e m i t r a i l e r . d . F l o o r i s m a d e o f b o l t e d t o b o d y c h a s s i s . e . E i g h t r e f l e c t o r s o n b o d y a s f o l l o w s : o n l e f t r e a r and leaving hardwood boards ( 4 ) a r e l o c a t e d . O n e e a c h c o r n e r o f f r o n t . One each corner of rear
2-20. WINDOWS
a . The M129A3 semitrailer van has
s e v e n w i n d o w s c o n s i s t i n g o f : . T h r e e r e t r a c t a b l e w i n d o w s ( r i g h t s i d e ) ( f i g u r e 2 - 1 5 ) . T h r e e r e t r a c t a b l e w i n d o w s ( l e f t s i d e ) . O n e s t a t i o n a r y w i n d o w ( f r o n t ) ( f i g u r e 2 - 1 6 ) . b . B l a c k o u t c o v e r s ( 1 , f i g u r e 2 - 1 5 ) t h a t s l i d e u p i n s i d e o f t h e s e m i t r a i l e r . c . B r u s h g u a r d s ( 2 ) . — d . A l e v e r ( 3 ) i s u s e d t o o p e n a n d c l o s e r e t r a c t a b l e w i n d o w s a s h ( 4 ) . F i g u r e 2 - 1 5 . R e t r a c t a b l e window F i g u r e 2 - 1 6 . Stationary window
S e c t i o n I I . OPERATOR/CREW PREVENTIVE MAINTENANCE
CHECKS AND SERVICES (PMCS)
Page Maintenance Forms and Records . . . 2 - 9 Operator/Crew Preventive Maintenance Checks and Services . . . 2 - 9
2 - 2 1 . MAINTENANCE FORMS AND RECORDS
T h e f o r m s a n d r e c o r d s y o u f i l l o u t h a v e s e v e r a l u s e s . They are a permanent r e c o r d o f t h e s e r v i c e s , r e p a i r s a n d m o d i f i c a t i o n s m a d e o n y o u r v e h i c l e . They are r e p o r t s t o o r g a n i z a t i o n a l m a i n t e n a n c e a n d t o y o u r c o m m a n d e r . They are also a c h e c k l i s t f o r y o u w h e n y o u w a n t t o k n o w w h a t i s w r o n g w i t h v e h i c l e a f t e r i t s l a s t u s e a n d w h e t h e r t h o s e f a u l t s h a v e b e e n f i x e d . F o r i n f o r m a t i o n o n f o r m s a n d r e c o r d s , see DA Pam 738-750.
2 - 2 2 .
a . Do your before (B) PREVENTIVE MAINTENANCE just before you operate the
v e h i c l e . Pay attention to CAUTIONS and WARNINGS.
b . Do your during (D) PREVENTIVE MAINTENANCE during operation. ( D u r i n g —
o p e r a t i o n m e a n s t o m o n i t o r t h e v e h i c l e a n d i t s r e l a t e d c o m p o n e n t s w h i l e t h e y a r e a c t u a l l y b e i n g o p e r a t e d . )
c . Do your after (A) PREVENTIVE MAINTENANCE right after operating the vehicle.
Pay attention to CAUTIONS and WARNINGS.
d . DO your weekly (W) PREVENTIVE MAINTENANCE once a week.
—
e . I f s o m e t h i n g d o e s n o t w o r k , t r o u b l e s h o o t i t w i t h t h e i n s t r u c t i o n s i n t h i s —
m a n u a l a n d n o t i f y y o u r s u p e r v i s o r .
f. Always do your PREVENTIVE MAINTENANCE in the same order so it gets to be a h a b i t . Once you have had some practice, you ’ 1 1 s p o t a n y t h i n g w r o n g i n a h u r r y .
g . I f a n y t h i n g l o o k s w r o n g a n d y o u c a n ’ t f i x i t , write it on your DA Form 2404. I f s o m e t h i n g i s s e r i o u s l y w r o n g , r e p o r t i t t o o r g a n i z a t i o n a l m a i n t e n a n c e R I G H T N O W !
h. When you do your PREVENTIVE MAINTENANCE, take the proper tools needed to make a l l c h e c k s . A l w a y s t a k e c l e a n r a g s w i t h y o u .
WARNING
D r y c l e a n i n g s o l v e n t ( P D - 6 8 0 ) i s b o t h t o x i c a n d
f l a m m a b l e . A v o i d p r o l o n g e d b r e a t h i n g o f v a p o r s . A v o i d s k i n c o n t a c t . U s e o n l y i n a w e l l v e n t i l a t e d a r e a . Keep away from open flame. F l a s h p o i n t o f s o l v e n t i s
138°F (59°C).
( 1 ) K e e p w o r k i n g a r e a a n d t o o l s c l e a n . D i r t , g r e a s e , o i l a n d d e b r i s o n l y g e t
in the way and may cover up a serious problem. Clean as you work and as
needed. U s e d r y c l e a n i n g s o l v e n t ( P D - 6 8 0 ) t o c l e a n m e t a l s u r f a c e s . Use s o a p a n d w a t e r t o c l e a n r u b b e r a n d p l a s t i c m a t e r i a l . ( 2 ) C h e c k f o r l o o s e , m i s s i n g , b e n t o r b r o k e n b o l t s , n u t s , a n d s c r e w s . Check f o r c h i p p e d p a i n t , b a r e m e t a l o r r u s t a r o u n d b o l t h e a d s . T i g h t e n l o o s e b o l t s o r r e p o r t i t t o o r g a n i z a t i o n a l m a i n t e n a n c e i f y o u a r e u n a b l e t o t i g h t e n i t . ( 3 ) C h e c k f o r l o o s e o r c h i p p e d p a i n t , r u s t o r g a p s w h e r e p a r t s a r e w e l d e d t o g e t h e r . R e p o r t b a d w e l d s t o o r g a n i z a t i o n a l m a i n t e n a n c e . ( 4 ) C h e c k f o r c r a c k e d o r b r o k e n i n s u l a t i o n , b a r e w i r e s a n d l o o s e o r b r o k e n c o n n e c t o r s . T i g h t e n l o o s e c o n n e c t o r s . Make sure wires are in good shape.
Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS) B-Before D - D u r i n g A - A f t e r W-Weekly NOTE : W i t h i n d e s i g n a t e d i n t e r v a l , t h e s e c h e c k s a r e t o b e p e r f o r m e d i n t h e o r d e r l i s t e d . Item No. 1 2 3 I n t e r v a l 8 B l l Item To Be Inspected
P r o c e d u r e s : Check for and have
r e r q u i r e d , f i l l e d , o r a d j u s t e d a s n e e d e d
Perform weekly as well as before PMCS if: a . Y o u a r e t h e a s s i g n e d o p e r a t o r b u t h a v e n o t o p e r a t e d t h e v e h i c l e s i n c e t h e l a s t w e e k l y . b . Y o u a r e o p e r a t i n g t h e f i r s t t i m e . TIRES a. C h e c k t i r e p r e s s u r e v e h i c l e f o r t h e ( 6 0 p s i - h a r d road, 4 0 p s i c r o s s - c o u n t r y ) w h e n t i r e s a r e c o o l . b . C h e c k t i r e s f o r c u t s , f o r e i g n o b j e c t s o r u n u s u a l t r e a d w e a r . Remove a n y s t o n e s f r o m b e t w e e n t i r e s . WHEELS NOTE L e f t w h e e l n u t s a r e t u r n e d c o u n t e r c l o c k w i s e t o t i g h t e n a n d c l o c k w i s e t o l o o s e n . R i g h t w h e e l n u t s a r e t u r n e d c l o c k w i s e t o t i g h t e n a n d c o u n t e r c l o c k w i s e t o l o o s e n .
Check wheels for damage and wheel nuts f o r t i g h t n e s s a n d p r e s e n c e .
AIR HOSES AND CABLES
C h e c k i n t e r v e h i c u l a r a i r h o s e s a n d c a b l e s f o r c u t s a n d b r e a k s . Equipment is Not Ready/ A v a i l a b l e i f : T w o o r m o r e t i r e s h a v e c u t s o r a b r a s i o n s t h a t w o u l d r e s u l t i n t i r e f a i l u r e d u r i n g o p e r a t i o n . Two or more tires m i s s i n g o r u n s e r v i c e a b l e . TWO or more wheel n u t s m i s s i n g f r o m any wheel. A i r h o s e s o r i n t e r -v e h i c u l a r c a b l e s a r e b r o k e n o r m i s s i n g . 2-11
Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS)
B-Before D-During A - A f t e r W-Weekly
NOTE : W i t h i n d e s i g n a t e d i n t e r v a l , these checks are to be performed in the order l i s t e d .
Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS)
B-Before D-During A - A f t e r W-Weekly
NOTE : Within designated interval, these checks are to be performed in the order
l i s t e d .
Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS) B-Before D - D u r i n g A - A f t e r W-Weekly NOTE : W i t h i n d e s i g n a t e d i n t e r v a l , t h e s e c h e c k s a r e t o b e p e r f o r m e d i n t h e o r d e r l i s t e d . Item No. 6 7 Item To Be Inspected
P r o c e d u r e s : Check for and have
r e q u i r e d , f i l l e d , o r a d j u s t e d a s n e e d e d a . O p e n d r a i n c o c k s ( 1 ) o n a i r r e s e r v o i r s ( 2 ) t o d r a i n c o n d e n s a t i o n . C l o s e d r a i n c o c k s . b . I n s p e c t a i r r e s e r v o i r s ( 2 ) f o r damages.
LIGHTS AND REFLECTORS
A n a s s i s t a n t i s r e q u i r e d w h i l e c h e c k i n g t h e b r a k e l i g h t s . a. I f t a c t i c a l s i t u a t i o n p e r m i t s , c o n n e c t i n t e r v e h i c u l a r c a b l e t o t h e t o w i n g v e h i c l e . O p e r a t e t h e v e h i c l e l i g h t s w i t c h t h r o u g h a l l s e t t i n g s a n d c h e c k t h e l i g h t s .
b . Check for damage and presence of
r e f l e c t o r s . LANDING LEG a. I n s p e c t h a n d c r a n k ( 1 ) , g e a r b o x ( 2 ) a n d l a n d i n g l e g f o o t ( 3 ) f o r s e c u r e mounting. C h e c k t h a t h a n d c r a n k h o l d e r ( 4 ) s t o w s h a n d c r a n k ( 1 ) s e c u r e l y . b . W h e n c r a n k i n g l a n d i n g l e g ( 5 ) , c h e c k that each leg moves smoothly and does not b i n d . P u l l o u t h a n d c r a n k a n d c h e c k f o r h i g h s p e e d o p e r a t i o n . P u s h i n f o r l o w s p e e d o p e r a t i o n . Equipment is Not Ready/ A v a i l a b l e i f :
Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS)
B-Before D-During A - A f t e r W-Weekly
NOTE: Within designated interval, these checks are to be performed in the order
l i s t e d .
Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS) B - B e f o r e D - D u r i n g A - A f t e r W-Weekly NOTE: W i t h i n d e s i g n a t e d i n t e r v a l , t h e s e c h e c k s a r e t o b e p e r f o r m e d i n t h e o r d e r l i s t e d . Item No. 12 13 14 Item To Be Inspected
P r o c e d u r e s : Check for and have
r e q u i r e d , f i l l e d , o r a d j u s t e d a s n e e d e d BODY
a. V i s u a l l y i n s p e c t w i n d o w s f o r b r o k e n g l a s s .
b. Check doors and panels for proper
o p e r a t i o n a n d s e c u r i t y .
c. Check for any tampering or damage
t h a t m a y h a v e o c c u r r e d s i n c e l a s t o p e r a t i o n . ACCESSORIES V i s u a l l y i n s p e c t a s s e m b l i e s s u c h a s s p a r e t i r e c a r r i e r , r e a r s t e p , s t e p l a d d e r a n d c h o c k b l o c k s f o r l o o s e n e s s o f m o u n t i n g s o r c o n n e c t i o n s . OPERATION a. B e a l e r t f o r a n y u n u s u a l n o i s e s w h e n t o w i n g s e m i t r a i l e r . S t o p a n d i n v e s t i g a t e a n y u n u s u a l n o i s e s . b . E n s u r e t h a t s e m i t r a i l e r i s t r a c k i n g c o r r e c t l y w i t h n o s i d e p u l l . Equipment is Not Ready/ A v a i l a b l e i f :
S e c t i o n I I I . OPERATION UNDER USUAL CONDITIONS
Page Data Plate . . . 2-25 Operating Spare Tire Carrier . . . 2-24 O p e r a t i n g T o w i n g V e h i c l e a n d S e m i t r a i l e r . . . 2-20 P r e p a r i n g S e m i t r a i l e r f o r S t a t i o n a r y U s e . . . 2-22 P r e p a r a t i o n f o r U s e . . . 2-17 U n c o u p l i n g S e m i t r a i l e r f r o m T o w i n g V e h i c l e . . . 2-21
2 - 2 3 . PREPARATION FOR USE
P e r f o r m t h e p r e v e n t i v e m a i n t e n a n c e c h e c k s a n d s e r v i c e s ( B - B e f o r e O p e r a t i o n
C o l u m n ) l i s t e d i n T a b l e 2 - 1 b e f o r e d o i n g t h e f o l l o w i n g p r o c e d u r e s . These checks and s e r v i c e s w i l l d e t e r m i n e t h a t s e m i t r a i l e r i s r e a d y f o r o p e r a t i o n .
a . P o s i t i o n i n g the Chock Blocks. —
(1) Remove chock blocks from stowage brackets.
( 2 ) P l a c e c h o c k b l o c k s b e h i n d t i r e s o n l e v e l g r o u n d o r u p h i l l s l o p e . O n d o w n h i l l s l o p e , p l a c e c h o c k b l o c k s i n f r o n t o f t i r e s . b. C o u p l i n g S e m i t r a i l e r t o T o w i n g V e h i c l e . — WARNING B e s u r e a l l p e r s o n n e l s t a n d c l e a r o f t h e t r a c t o r a n d s e m i t r a i l e r d u r i n g c o u p l i n g o p e r a t i o n s o r p e r s o n a l i n j u r y m a y r e s u l t . ( 1 ) A l i g n t o w i n g v e h i c l e w i t h s e m i t r a i l e r . ( 2 ) S l o w l y b a c k t o w i n g v e h i c l e i n t o p o s i t i o n . B e s u r e k i n g p i n ( 1 , f i g u r e 2 -1 7 ) i s i n l i n e w i t h f i f t h w h e e l c o u p l e r j a w s ( 2 ) . ( 3 ) S t o p t h e t o w i n g v e h i c l e j u s t b e f o r e t h e k i n g p i n p l a t e o f t h e s e m i t r a i l e r s t a r t s t o r i d e u p t h e f i f t h w h e e l ( 3 ) o f t h e t o w i n g v e h i c l e . 2 - 1 7
F i g u r e 2 - 1 7 . C o u p l i n g s e m i t r a i l e r t o t o w i n g v e h i c l e
c . C o n n e c t I n t e r v e h i c u l a r H o s e s . —
CAUTION
T h i s o p e r a t i o n i s p e r f o r m e d t o l o c k t h e brakes and prevent movement of the s e m i t r a i l e r . Landing legs may be damaged (1) (2) (3) i f t h e s e m i t r a i l e r m o v e s . C o n n e c t t h e t w o a i r h o s e s
marked SERVICE (1, figure 2-18) and EMERGENCY (2) on towing v e h i c l e t o c o r r e s p o n d i n g a i r h o s e c o u p l i n g s o n t h e s e m i t r a i l e r . O p e n a i r l i n e s s h u t o f f v a l v e s o n t o w i n g v e h i c l e . I f n o a i r l e a k a g e i s d e t e c t e d , a p p l y t h e b r a k e s o n t h e
s e m i t r a i l e r from the towing v e h i c l e .
F i g u r e 2 - 1 8 . C o n n e c t i n g i n t e r v e h i c u l a r hoses
d. — C o m p l e t i n g C o u p l i n g S e m i t r a i l e r t o T o w i n g V e h i c l e . (1) (2) (3) (4) (5) (6) B e f o r e k i n g p i n p l a t e ( 1 , f i g u r e 2 - 1 9 ) s t a r t s t o r i d e a p p r o a c h r a m p s ( 2 ) , c h e c k t h a t t h e k i n g p i n p l a t e ( 1 ) i s a b o v e a p p r o a c h r a m p s ( 2 ) . A d j u s t h e i g h t a s n e e d e d b y u s i n g l a n d i n g g e a r . Make sure t o w i n g v e h i c l e f i f t h w h e e l c o u p l e r j a w s ( 3 ) a r e o p e n . S l o w l y b a c k t h e t o w i n g v e h i c l e u n t i l c o u p l e r j a w s ( 3 ) e n g a g e t h e k i n g p i n ( 4 ) . F i g u r e 2 - 1 9 . Completing coupling s e m i t r a i l e r t o t o w i n g v e h i c l e CAUTION V i s u a l l y c h e c k t h e c o u p l i n g . Y o u s h o u l d n o t b e a b l e t o s e e d a y l i g h t b e t w e e n t h e f i f t h w h e e l a n d t h e k i n g p i n p l a t e . M a k e s u r e c o u p l i n g i s s e c u r e b y i n c h i n g t r u c k t r a c t o r f o r w a r d . I f c o u p l i n g i s n o t l o c k e d , r o c k t r u c k t r a c t o r b a c k a n d f o r t h s l o w l y u n t i l k i n g p i n ( 1 ) i s l o c k e d i n f i f t h w h e e l ( 5 ) . C o n n e c t i n t e r v e h i c u l a r c a b l e b y o p e n i n g t h e c o v e r o n t h e r e c e p t a c l e .
A l i g n s l o t o n p l u g w i t h a l i g n i n g k e y o f r e c e p t a c l e . Release cover. Operate l i g h t s f r o m t o w i n g v e h i c l e t o m a k e c e r t a i n l i g h t s a r e i n w o r k i n g o r d e r . T h e 1 2 v o l t r e c e p t a c l e i s l o c a t e d t h e 2 4 v o l t r e c e p t a c l e i s l o c a t e d s e m i t r a i l e r f r o n t c r o s s m e m b e r . CAUTION o n t h e l e f t s i d e a n d o n t h e r i g h t s i d e o f I f c o u p l i n g o p e r a t i o n i s n o t c o m p l e t e d a n d a n o t h e r a t t e m p t i s t o b e m a d e , p u l l t o w i n g v e h i c l e f o r w a r d c a r e f u l l y . D o n o t e x c e e d t h e l i m i t s o f a i r h o s e s a n d e l e c t r i c a l c a b l e . C h e c k t h e a i r l i n e s a n d e l e c t r i c a l c a b l e t o b e s u r e t h a t t h e y a r e s u p p o r t e d a n d w i l l n o t c a t c h o r c h a f e . R e c h e c k f i f t h w h e e l / k i n g p i n l o c k i n g b y t r y i n g t o m o v e t r u c k t r a c t o r a n d s e m i t r a i l e r f o r w a r d . 2 - 1 9
e. R a i s i n g T h e L a n d i n g Gear. — F i g u r e 2 - 2 0 . Landing gear (1) (2) U n h o o k c r a n k ( 1 , f i g u r e f r o m c r a n k h o l d e r ( 2 ) . R a i s e c r a n k ( 1 ) . 2 - 2 0 ) P u l l o u t o n c r a n k f o r h i g h s p e e d o p e r a t i o n . ( 3 ) T u r n c r a n k ( 1 ) c o u n t e r c l o c k w i s e u n t i l l e g s ( 3 ) h a v e b e e n r e t r a c t e d . ( 4 ) L o w e r c r a n k ( 1 ) a n d s e c u r e i n c r a n k h o l d e r ( 2 ) .
(5) Remove and stow chock block and c h a i n s . Remove and stow
f l o a t p a d s , i f u s e d .
2 - 2 4 . OPERATING TOWING VEHICLE AND SEMITRAILER
a . D r i v i n g . W h e n d r i v i n g t h e t r u c k t r a c t o r a n d s e m i t r a i l e r , t h e o v e r a l l l e n g t h o f t h e u n i t m u s t b e k e p t i n m i n d w h e n p a s s i n g o t h e r v e h i c l e s a n d w h e n t u r n i n g . B e c a u s e t h e u n i t i s h i n g e d i n t h e m i d d l e , t u r n i n g a n d b a c k i n g a r e a l s o a f f e c t e d . b . T u r n i n g . W h e n t u r n i n g c o r n e r , a l l o w f o r t h e f a c t t h a t t h e s e m i t r a i l e r w h e e l s t u r n i n s i d e t h e t u r n i n g r a d i u s o f t h e t r u c k t r a c t o r . T o m a k e a r i g h t t u r n a t a r o a d i n t e r s e c t i o n , d r i v e t h e t o w i n g v e h i c l e a b o u t h a l f w a y i n t o t h e i n t e r s e c t i o n a n d t h e n c u t s h a r p l y t o t h e r i g h t . T h i s w i l l a l l o w f o r t h e s h o r t e r t u r n i n g r a d i u s o f t h e s e m i t r a i l e r a n d w i l l k e e p i t o f f t h e c u r b . c. S t o p p i n g . I n n o r m a l o p e r a t i o n , t h e b r a k e s o f t h e t r u c k t r a c t o r a n d t h e s e m i t r a i l e r a r e a p p l i e d a t t h e s a m e t i m e w h e n t h e d r i v e r s t e p s o n t h e b r a k e p e d a l . B r a k e p r e s s u r e m u s t b e a p p l i e d g r a d u a l l y a n d s m o o t h l y . T h e s e m i t r a i l e r b r a k e s m a y b e a p p l i e d s e p a r a t e l y b y u s i n g t h e b r a k e c o n t r o l l e v e r o n t h e t r u c k t r a c t o r s t e e r i n g column. O n s t e e p d o w n g r a d e s o r s l i p p e r y s u r f a c e s , t h e s e m i t r a i l e r b r a k e s m u s t b e a p p l i e d b e f o r e t h e t r u c k t r a c t o r b r a k e s . T h i s w i l l r e d u c e t h e p o s s i b i l i t y o f j a c k -k n i f i n g t h e s e m i t r a i l e r . d. P a r k i n g . W h e n t h e t r u c k t r a c t o r a n d t h e s e m i t r a i l e r a r e t o b e p a r k e d a n d l e f t u n a t t e n d e d , s e t t h e p a r k i n g b r a k e o n t h e t r u c k t r a c t o r a n d a p p l y t h e b r a k e s o n t h e s e m i t r a i l e r . T u r n o f f t h e t r u c k t r a c t o r e n g i n e b e f o r e l e a v i n g t h e c a b . B l o c k t h e s e m i t r a i l e r w h e e l s w i t h c h o c k b l o c k s . e. Backing. W h e n e v e r p o s s i b l e , t h e a s s i s t a n t d r i v e r o r a n o t h e r p e r s o n w i l l a c t — a s a g r o u n d g u i d e t o a s s i s t a n d d i r e c t t h e d r i v e r . A d j u s t a l l r e a r v i e w m i r r o r s b e f o r e b a c k i n g . W h e n b a c k i n g , t h e r e a r o f t h e s e m i t r a i l e r w i l l a l w a y s m o v e i n t h e o p p o s i t e d i r e c t i o n o f t h a t i n w h i c h t h e f r o n t w h e e l s a r e t u r n e d . When the wheels of
t h e t r u c k t h e l e f t . r e q u i r e d , t h i s w i l l t r a c t o r a r e t u r n e d t o t h e r i g h t , t h e r e a r o f t h e s e m i t r a i l e r w i l l g o t o W h e n t h e s e m i t r a i l e r h a s t u r n e d a n d b a c k i n g i n a s t r a i g h t l i n e i s t u r n t h e t r u c k t r a c t o r w h e e l s i n t h e d i r e c t i o n t h e s e m i t r a i l e r i s m o v i n g . s l o w l y b r i n g t h e t r u c k t r a c t o r a n d t h e s e m i t r a i l e r i n t o a s t r a i g h t l i n e .
2 - 2 5 . UNCOUPLING SEMITRAILER FROM TOWING VEHICLE
a . P o s i t i o n i n g C h o c k B l o c k s . —
(1) (2)
Remove chock blocks from stowage brackets.
P l a c e c h o c k b l o c k s b e h i n d t i r e s o n l e v e l g r o u n d o r u p h i l l s l o p e . O n d o w n h i l l s l o p e , p l a c e c h o c k b l o c k s i n f r o n t o f t i r e s . b . L o w e r i n g Landing Gear. — ( 1 ) U n h o o k c r a n k ( 1 , f i g u r e 2 - 2 1 ) f r o m c r a n k h o l d e r ( 2 ) . ( 2 ) R a i s e t h e c r a n k ( 1 ) . T o p r e v e n t l a n d i n g l e g s f r o m s i n k i n g i n s o f t g r o u n d , p l a c e f l o a t p a d s ( g r o u n d b o a r d a s s e m b l i e s ) ( 4 ) u n d e r l a n d i n g s h o e s ( 5 ) . P u s h c r a n k i n f o r l o w s p e e d o p e r a t i o n . ( 3 ) T u r n c r a n k ( 1 ) c l o c k w i s e u n t i l l e g s ( 3 ) a r e e x t e n d e d .
F i g u r e 2 - 2 1 . Lowering landing gear
c . U n c o u p l i n g S e m i t r a i l e r F r o m T o w i n g — V e h i c l e . ( 1 ) (2) (3) C l o s e s h u t o f f v a l v e s f o r s e r v i c e a n d e m e r g e n c y a i r s u p p l y l o c a t e d o n t h e t o w i n g v e h i c l e . D i s c o n n e c t b o t h t h e s e r v i c e a i r hose and emergency air hose f r o m a i r h o s e c o u p l i n g s ( 1 a n d 2 , f i g u r e 2 - 2 2 ) .
D i s c o n n e c t e l e c t r i c a l c a b l e
f r o m c o n n e c t o r ( 3 ) . F i g u r e 2 - 2 2 . Uncoupling semitrailer from towing vehicle
F i g u r e 2 - 2 3 . F i f t h w h e e l ramps
and approach
2 - 2 6 . PREPARING SEMITRAILER FOR STATIONARY USE
Figure 2-24. 1 1 0 v o l t e x t e r n a l receptacle ( 4 ) R e l e a s e s e m i t r a i l e r k i n g p i n f r o m t o w i n g v e h i c l e f i f t h w h e e l . ( 5 ) S l o w l y d r i v e t o w i n g v e h i c l e f o r w a r d u n t i l s e m i t r a i l e r i s c l e a r o f a p p r o a c h r a m p s ( 1 , f i g u r e 2 - 2 3 ) . a. Connecting 1 1 0 V o l t A C E x t e r n a l — P o w e r S o u r c e ( f i g u r e 2 - 2 4 ) . (1) Unscrew dust cover from 110
v o l t A C e x t e r n a l r e c e p t a c l e . ( 2 ) C o n n e c t e x t e r n a l 1 1 0 v o l t p o w e r s u p p l y t o r e c e p t a c l e . b . P o s i t i o n i n g L a d d e r . — ( 1 ) R e m o v e p i n s ( 1 , f i g u r e 2 - 2 5 ) f r o m l a d d e r ( 2 ) . Remove ladder ( 2 ) f r o m s e m i t r a i l e r . ( 2 ) W i t h v a n b o d y d o o r s ( 2 , f i g u r e 2 - 2 6 ) o p e n , h o o k l a d d e r ( 1 ) i n m o u n t i n g h o l e s ( 3 ) o n v a n . ( 3 ) R e m o v e p i n s ( 4 ) f r o m a d j u s t a b l e l e g s ( 5 ) . Remove adjustable l e g s ( 5 ) f r o m m o u n t i n g b r a c k e t s ( 6 ) . F i g u r e 2 - 2 5 . Removing ladder
( 4 ) I n s t a l l a d j u s t a b l e l e g s ( 5 ) o n l o w e r l a d d e r ( 1 ) . S e c u r e w i t h l o w e r p i n s ( 4 ) . ( 5 ) I n s t a l l h a n d r a i l ( 7 ) o n
a d j u s t a b l e l e g ( 5 ) .
c . T u r n i n g Dome Lights On. (1)
(2)
(3)
M o v e s w i t c h h a n d l e ( 1 , f i g u r e 2 - 2 7 ) up on 110 volt switch box to ON. Check ON-OFF position of
c i r c u i t b r e a k e r s ( 2 ) . A n o v e r l o a d m a y h a v e c a u s e d c i r c u i t b r e a k e r s t o b e i n O F F p o s i t i o n . T h e c i r c u i t b r e a k e r s m a y b e p l a c e d i n o p e r a t i n g c o n d i t i o n by moving switches to ON p o s i t i o n . P l a c e 1 1 0 v o l t d o m e l i g h t s w i t c h ( 1 , f i g u r e 2 - 2 8 ) o n r e a r w a l l t o O N p o s i t i o n . T h e 2 4 v o l t d o m e l i g h t s w i t c h ( 2 ) c a n b e u s e d w h e n s e m i t r a i l e r i s c o u p l e d t o t o w i n g v e h i c l e w i t h a 2 4 v o l t s y s t e m .
Figure 2-26. Positioning ladder
F i g u r e 2 - 2 7 . C i r c u i t b r e a k e r a n d switch box
Figure 2-28. Dome light switches
F i g u r e 2 - 2 9 . V e n t f a n d . Vent Fan O p e r a t i o n . — ( 1 ) O p e n v e n t l e v e r ( 1 , f i g u r e 2 -2 9 ) o n r i g h t s i d e o f v e n t f a n ( 2 ) . ( 2 ) T u r n v e n t f a n s w i t c h ( 3 ) t o O N p o s i t i o n . e . Window O p e r a t i o n . — ( 1 ) T u r n c r a n k ( 1 , f i g u r e 2 - 3 0 ) c l o c k w i s e t o o p e n w i n d o w ( 2 ) . T h i s p r o c e d u r e i s f o r t h e s i x r e t r a c t a b l e w i n d o w s o n l y . F i g u r e 2 - 3 0 . Window
2 - 2 7 . OPERATING SPARE TIRE CARRIER
a . Removing Spare Tire.
— ( 1 ) W i t h l u g n u t w r e n c h f r o m t o w i n g v e h i c l e , l o o s e n t w o s a f e t y n u t s ( 3 , f i g u r e (2) (3) (4) 2 - 3 1 ) s e c u r i n g s t u d s ( 7 ) o f w h e e l s u p p o r t ( 1 ) i n t h e b r a c k e t a s s e m b l y ( 2 ) . R o t a t e t i r e ( 4 ) s l i g h t l y t o f r e e s t u d s f r o m s l o t s . W e i g h t o f t i r e w i l l c a u s e i t t o f r e e f a l l t o g r o u n d . M a i n t a i n a f i r m g r i p o n w r e n c h w h e n l o w e r i n g t i r e t o p r e v e n t i n j u r y . F i t l u g n u t w r e n c h o n o p e r a t i n g s h a f t ( 5 ) , a n d h o l d w r e n c h f i r m l y . L i f t p a w l ( 6 ) a n d l o w e r t i r e ( 4 ) t o t h e g r o u n d .
Remove safety nuts (3) and release wheel support (1) from hub opening in the w h e e l .
b . I n s t a l l i n g T i r e . — ( 1 ) I n s e r t w h e e l s u p p o r t ( 1 , f i g u r e 2 - 3 1 ) i n h u b o p e n i n g a n d f i t s e c u r i n g s t u d s i n t w o s t u d h o l e s i n t h e w h e e l . ( 2 ) S c r e w s a f e t y n u t s ( 3 ) l o o s e l y o n s t u d s ( 7 ) . WARNING
Place pawl on ratchet when l i f t i n g s p a r e t i r e t o p r e v e n t i n j u r y . ( 3 ) W i t h l u g n u t w r e n c h , r o t a t e o p e r a t i n g s h a f t ( 5 ) c l o c k w i s e t o l i f t w h e e l ( 4 ) a n d w h e e l s u p p o r t ( 1 ) u n t i l s t u d s ( 7 ) a n d n u t s ( 3 ) p a s s t h r o u g h h o l e s i n (4) t h e b r a c k e t a s s e m b l y ( 2 ) . R o t a t e s t u d s i n s l o t s a n d a n c h o r i n p l a c e b y t i g h t e n i n g s a f e t y n u t s ( 3 ) . F i g u r e 2 - 3 1 . S p a r e t i r e c a r r i e r 2 - 2 8 . DATA PLATE T h e d a t a p l a t e ( f i g u r e 2 - 3 2 ) i s l o c a t e d o n t h e f r o n t l o w e r r i g h t h a n d c o r n e r o f t h e v a n . T h e d a t a p l a t e f u r n i s h e s t h e o r d n a n c e s t o c k n u m b e r , m a n u f a c t u r e r ’ s n a m e a n d s e r i a l n u m b e r , weight and dimension data, s h i p p i n g c u b a g e , p u b l i c a t i o n s
p e r t a i n i n g t o t h e v e h i c l e , d e l i v e r y d a t e a n d i n s p e c t o r ’ s i n i t i a l s .
F i g u r e 2 - 3 2 . D a t a p l a t e
S e c t i o n I V . OPERATION UNDER UNUSUAL CONDITIONS
F o r d i n g O p e r a t i o n s . . . . Operation in Dusty or Sandy Areas . . . . O p e r a t i o n i n E x t r e m e C o l d . . . . Operation in Extreme Heat . . . . Operation in Mud . . . . O p e r a t i o n i n R a i n y o r H u m i d C o n d i t i o n s . . . . O p e r a t i o n i n S a l t W a t e r A r e a s . . . . Operation in Snow . . . . P a r k i n g B r a k e . . . . Page 2-27 2-27 2-26 2 - 2 6 2-27 2-26 2-27 2-27 2-28
2 - 2 9 . OPERATION IN ExTREME COLD
a . O p e r a t i o n . — (1) (2) (3) (4) B e c a r e f u l w h e n p l a c i n g t h e s e m i t r a i l e r i n m o t i o n a f t e r a s h u t d o w n . C o n g e a l e d l u b r i c a n t s c a n c a u s e p a r t f a i l u r e . T i r e s m a y b e f r o z e n t o t h e g r o u n d o r w i t h a f l a t s p o t i f t h e y w e r e u n d e r -i n f l a t e d . B r a k e s h o e s m a y b e f r o z e n t o t h e b r a k e d r u m s a n d w i l l r e q u i r e p r e h e a t i n g b y u s i n g a t o r c h t o a v o i d d a m a g e . R e f e r t o F M 9 - 2 0 7 a n d F M 2 1 - 3 0 5 f o r s p e c i a l i n s t r u c t i o n s o n d r i v i n g h a z a r d s in snow and ice that may be encountered during extremely cold weather c o n d i t i o n s . b . A t - H a l t P a r k i n g . — ( 1 ) F o r s h o r t s h u t d o w n p e r i o d s , p a r k i n a s h e l t e r e d s p o t o u t o f t h e w i n d . ( 2 ) F o r l o n g s h u t d o w n p e r i o d s , i f h i g h d r y g r o u n d i s n o t a v a i l a b l e , p r e p a r e a f o o t i n g o f (3) Remove all 2 - 3 0 . OPERATION IN p l a n k s o r b r u s h . b u i l t - u p i c e a n d s n o w a s s o o n a s p o s s i b l e a f t e r s h u t d o w n . EXTREME H E A T a. D o n o t p a r k t h e s e m i t r a i l e r i n t h e s u n s u n l i g h t w i l l s h o r t e n t h e l i f e o f t h e t i r e s . b. P a r k t h e s e m i t r a i l e r w h e r e i t w i l l g e t — d u s t . 2 - 3 1 . OPERATION IN RAINY OR F r e q u e n t l y i n s p e c t , c l e a n f u n g u s a c c u m u l a t i o n . f o r l o n g p e r i o d s o f t i m e a s h e a t a n d
maximum protection from heat, sun and
HUMID CONDITIONS
2 - 3 2 . OPERATION IN SALT WATER AREAS S a l t w a t e r w i l l c a u s e m e t a l p a r t s t o r u s t a n d c o r r o d e . C l e a n , inspect and l u b r i c a t e f r e q u e n t l y . 2 - 3 3 . OPERATION IN SNOW R e f e r t o F M 2 1 - 3 0 5 f o r s p e c i a l i n s t r u c t i o n s o n o p e r a t i o n s i n s n o w . 2 - 3 4 . OPERATION IN MUD CAUTION U n d e r n o c i r c u m s t a n c e s w i l l t h e s e m i t r a i l e r b e t o w e d , p u l l e d o r p u s h e d b y t h e r e a r b u m p e r . a. I f o n e o r m o r e w h e e l s s i n k i n t o t h e m u d , i t m a y b e n e c e s s a r y t o j a c k u p t h e m i r e d w h e e l a n d i n s e r t p l a n k i n g o r m a t t i n g b e n e a t h i t . b . C l e a n o f f a l l m u d a s s o o n a f t e r o p e r a t i o n a s p o s s i b l e . —
2 - 3 5 . OPERATION IN DUSTY OR SANDY AREAS
CAUTION U n d e r n o c i r c u m s t a n c e s w i l l t h e s e m i t r a i l e r b e t o w e d , p u l l e d o r p u s h e d b y t h e r e a r b u m p e r . F r e q u e n t l y c l e a n , i n s p e c t a n d l u b r i c a t e t h e s e m i t r a i l e r . 2 - 3 6 . FORDING OPERATIONS a . W h e e l b e a r i n g s s h o u l d b e c l e a n e d a n d r e p a c k e d w i t h l u b r i c a n t a s s p e c i f i e d — o n t h e l u b r i c a t i o n c h a r t a f t e r e a c h b . C a b l e s a n d t e r m i n a l s m u s t b e compound. c . D o n o t d r i v e t h e s e m i t r a i l e r — submersion. p r o t e c t e d b y s p r a y i n g w i t h i g n i t i o n i n s u l a t i o n
through water deeper than 30 inches (76 cm).
2 - 3 7 . PARKING BRAKE T h e p a r k i n g b r a k e i s u s e d t o r e l e a s e a i r f r o m t h e a i r r e s e r v o i r s t o e n g a g e t h e b r a k e s y s t e m . a. P u l l p a r k i n g b r a k e h a n d l e ( 2 , f i g u r e 2 - 3 3 ) , l o c a t e d o n l e f t s i d e o f s e m i t r a i l e r u n d e r t h e a i r c h a r g i n g v a l v e ( 1 ) , t o a p p l y b r a k e s y s t e m . b . T o r e l e a s e p a r k i n g b r a k e , p u s h h a n d l e ( 2 ) i n . — F i g u r e 2 - 3 3 . Parking brake
