Section 6

M

M

M

Meeeeggggaaaassssttttrrrruuuutttt

S

S

S

Suuuussssppppeeeennnnssssiiiioooonnnn C

C

C

Coooonnnnttttrrrroooollllssss

G

G

G

GM

M

MK

M

K

K

K IIIIIIII

Suspension

Control Module

.A9 Carrier Enclosure Right Side

T R A I N I N G I N S T I T U T E

Electronic Suspension Control

X1

X2

Unlocking Suspension

Suspension Lock/Unlock

Suspension Lock/Unlock

0 1 S8

.A5

-Y61 -Y62 -Y66

1 A x le Block 2-5 Axle B lo c k Right Ac cu m u la to r Le ft A ccu m u la to r K15 K14 K6 K5

Concept Drawing Only!

-Y68 1 A x le Block 2-5 Axle Block P P

Suspension Locked

When K15 is activated the contacts allow a ground to power the K40, K41, K42 and K43 relay coils

(found on page 4 enclosure .A9)

These coils send power to Y03 and Y04 allowing axles 1,2 & 3 to share oil during

Off-the-Road Operation Y66 and Y68 are also powered to permit an extra accumulator on the rear axles to improve Off-the-Road suspension P P Y68 Y66 0 1 S8 0 1 S3 0 1 S2 0 1 S4 0 1 S5 0 1 S6 0 1 S7 K40 K41 K42 K43 S1 K26 K26

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3

-A2 -A1 -A4 -A3

Front Right Front Left Rear Right Rear Left Rear Left Rear Right Front Left Front Right K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1 -K15

K40 K41 K42 K43

-Y03 -Y04

0 1 S8

.A5

-Y61 -Y62 -Y66

1 A x le Block 2-5 Axle B lo c k Right Ac cu m u la to r Le ft A ccu m u la to r K15 K14 K6 K5

Concept Drawing Only!

-Y68 1 A x le Block 2-5 Axle Block P P

Suspension Unlocked

-Y61 -Y62 -Y66

1 Ax le B lock 2 -5 Ax le Bl o c k R ight Acc u mulat o r Le ft Ac cu m u la to r K15 K14 K6 K5

Concept Drawing Only!

-Y68 1 A x le Block 2-5 Axle Block P P -Y61 -Y62 -Y5 K6 K14 -Y66 -Y68 -Y5 0 1 S8 0 1 S3 0 1 S2 0 1 S4 0 1 S5 0 1 S6 0 1 S7 K40 K41 K42 K43 S1 K26 K26

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3

-A2 -A1 -A4 -A3

Front Right Front Left Rear Right Rear Left Rear Left Rear Right Front Left Front Right K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1_Suspension

Unlocked provides Ground

(from enclosure .A5, Page 2, grid 1)

Group Exercise #1:

The Operator will raise the

Front Struts Axles 1, 2 and 3

Top View

Side View

Suspension Control Panel

Indicator Lamp (H18) Selector Switch (S8)

Step 1 : Ensure Suspension is unlocked!

Step 2 : Arm Suspension Control Panel, by turning and locking key

Step 3 : Select “Raise” on the Raise/Lower Direction Rocker Switch

Step 4 : Push “Front” on the Front Strut Momentary Switch

Suspension Control Panel

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3

-A2 -A1 -A4 -A3

Front Right Front Left Rear Right Rear Left Rear Left Rear Right Front Left Front Right K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1

Engage S1 Key Switch Suspension Unlocked

provides Ground

K26

When S1 Switch is engaged a ground is provided the transmission that inhibits upshifting beyond 2nd Gear Forward

This remains in effect until the S1 Key is disengaged and removed from switch.

Transmission Ground Signal

K30

Which LED’s are Illuminated?

X1

X2

Suspension Control Module

What are the Input Signals?

What are the Output Signals?

This LED indicates the module has been powered

The E15 Input will be illuminated indicating raise has been engaged

The E9 Input will be illuminated indicating front

struts have been engaged The A2 Output will be

illuminated indicating the Front Left Solenoids

are energized The A3 Output will be illuminated indicating the Front Right Solenoids are

energized

The A8 Output will be illuminated indicating the 8Y1 Solenoid is are

energized

In the previous exercise we saw the

front 3 axles raised manually…

In the next exercise the crane

carrier will start with the

front 3 axles raised and

rear 2 axles lowered.

The operator will now

Group Exercise #2:

The Operator will

Auto-Level the Crane Carrier

Top View

Side View

?

?

?

?

Low

Suspension Control Panel

Using the control panel,

What steps does the

Operator take to

Auto-Level to

Highway Ride Height?

Step 1 :

Ensure Suspension is unlocked!

Indicator Lamp (H18) Selector Switch (S8)

Step 2 :

Arm Suspension Control Panel,

by turning and locking key

Step 3 :

Select “Auto Ride Height” on the

Auto Ride Height Rocker Switch

The Auto-Level Indicator Lamp comes on when the

carrier is seeking level.

The Lamp goes out when level is achieved.

Indicator Lamp (H18) Selector Switch (S8)

Suspension Control Panel

The Auto-Level Indicator Lamp is now out.

Indicating the Crane is now level

Suspension Control Panel

Unlock and Remove Key from suspension control

Your Crane

is now ready for

Now lets see what happened…

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3

-A2 -A1 -A4 -A3

Front Right Front Left Rear Right Rear Left Rear Left Rear Right Front Left Front Right K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1

Engage S1 Key Switch Suspension Unlocked

provides Ground

K26

When S1 Switch is engaged a ground is provided the transmission that inhibits upshifting beyond 2nd Gear Forward

This remains in effect until the S1 Key is disengaged and removed from switch.

Transmission Ground Signal

K30

Electronik Suspension Control Unit

Proximity Switch Inputs

B1, B2, B3 & B4 Upper Prox Switches, NO A1, A2, A3 & A4 Lower Prox Switches, NC

Proximity Switch Inputs

B3 & B4 Upper Prox Switches, NO

Now are closed and send a signal, to the control module. The signal indicates the rear carrier is low

Proximity Switch Inputs

A2 & A1 Lower Prox Switches, NC

Now are Closed and send a signal to the

control module. This indicates the front of the carrier is high.

The Front Struts are High

the Lower Proximity Switches are tripped

(A2 & A1)

A2

A1

Lower Proximity Switches

Tripped

The Rear Struts are Low

the Upper Proximity Switches are tripped

(B3 & B4)

B4

B3

X1

X2

Which LED’s are Illuminated?

Suspension Control Module

S8 Switch Energized

The Board Power LED is on once the S8 is energized

E10 Input LED On

E10 Auto-Level Input LED comes on once Auto-Level Switch is depressed.

This signals the Suspension Control Module to begin Auto-Leveling

E2 LED On

The E2 LED indicates that the A1 Proximity Switch

on the Front Left Strut is tripped (lower switch).

E4 LED On

The E4 LED indicates that the A2 Proximity Switch

on the Front Left Strut is tripped (lower switch).

E5 LED On

The E5 LED indicates that the B3 Proximity Switch

on the Rear Left Strut is tripped (upper switch).

E7 LED On

The E7 LED indicates that the B4 Proximity Switch

on the Rear Right Strut is tripped (upper switch).

E5 & E7 LED’s On

These two LED’s indicates that the rear of the carrier is

low. The control module will address this issue first by sending outputs to A4 and A5 and A8.

A8 LED On

A8 comes on to shift the 8Y1 valve. This valve is shifted to raise the rear of the carrier

A4 & A5 LED’s On

These two LED’s indicate that the control module is sending outputs to open the solenoids at rear of the carrier.

0 1 S8 0 1 S3 0 1 S2 0 1 S4 0 1 S5 0 1 S6 0 1 S7 K40 K41 K42 K43 S1 K26 K26

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw

-A2 -A1 -A4 -A3

Rear Left Rear Right Front Left Front Right br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3 Front Right Front Left Rear Right Rear Left K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1

K26

K30

Electronik Suspension Control Unit

The S8 Auto-Level Switch provide the needed inputs to

the control module. B4, B3 and A2, A1 Proximity

Switches

send input signals to the control module

-8Y1

-Y05 -Y06

The A8, A4 and A5 LED Output Signals provide signals to power the 8Y1, -Y05 and -Y06 Solenoids

Which LED’s are Illuminated?

Suspension Control Module

X1

X2

X1

X2

Once the Rear Carrier has been raised to Highway Ride Height E2 and E4 LED’s go out

X1

X2

A8 LED goes Out

This indicates that the 8Y1 solenoid turned off.

A4 & A5 LED’s go Out

This indicates that the rear carriers solenoids turned off.

A2 & A3 LED’s come On

This indicates that the front carrier’s solenoids come on and are allowed to drain off Thereby lowering the front.

0 1 S8 0 1 S3 0 1 S2 0 1 S4 0 1 S5 0 1 S6 0 1 S7 K40 K41 K42 K43 S1 K26 K26

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3 Front Right Front Left Rear Right Rear Left K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1

K26

K30

Electronik Suspension Control Unit

-Y03 -Y01

-Y04 -Y02

-Y01,-Y02,-Y03 and -Y04 Solenoids

These Solenoids will remain on until the front suspension cylinders have lowered to ride height. br bl sw br bl sw br bl sw br bl sw

-A2 -A1 -A4 -A3

Rear Left Rear Right Front Left Front Right 0 1 S8 0 1 S3 0 1 S2 0 1 S4 0 1 S5 0 1 S6 0 1 S7 K40 K41 K42 K43 S1 K26 K26

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3 Front Right Front Left Rear Right Rear Left K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1

K26

K30

Electronik Suspension Control Unit

-Y03 -Y01 -Y04 -Y02 A2 & A1 Proximity Switches

A2 and A1 Proximity Switch lines have now been restored to no signal

indicating the Front Carrier is at Highway Ride Height. br bl sw br bl sw br bl sw br bl sw

-A2 -A1 -A4 -A3

Rear Left Rear Right Front Left Front Right

br bl sw br bl sw br bl sw br bl sw

-A2 -A1 -A4 -A3

Rear Left Rear Right Front Left Front Right 0 1 S8 0 1 S3 0 1 S2 0 1 S4 0 1 S5 0 1 S6 0 1 S7 K40 K41 K42 K43 S1 K26 K26

Electronik Suspension Control Unit

H1 H2 H3

Allison Trans Inhibit Ground Signal

Auto Level

Front Right Rear

All Raise/ Lower Up/Down Level Left K30 K 30 br bl sw br bl sw br bl sw br bl sw -Y03 -Y01 -Y04 -Y02 -Y06 -Y05 -8Y1 -B2 -B1 -B4 -B3 Front Right Front Left Rear Right Rear Left K41 K40 K42 K43 2 - 3 Ax le L e ft 2 3 A x le R ig h t 1 A x le Right 1 A x le L e ft 4 - 5 Ax le L e ft 4 - 5 Ax le R ig h t

Carrier Suspension Circuit

.A9 -F5 1

K26

K30

Electronik Suspension Control Unit

Highway Ride Height

Once all proximity switches have returned to normal and the unit is at highway ride height the H3 Yellow Lamp goes out.