Self-explanatory B. Job set-up Information
(1) Tools, fixtures and equipment
NOTE: Use the special tools and equipment given in the list in the page block
“SPECIAL TOOLS, FIXTURES, EQUIPMENT AND CONSUMABLES”.
PART NUMBER
QTY NAME
No specific 1 Cabin with suction and water screen functions, type CORAL MINIVELO series
No specific 1 Ultrasonic cleaning machine, FISA type, series 3 FR 34 No specific 1 Megger for measuring the insulation resistance at 45-50 V DC No specific 1 Compressed air with a capacity of 7,5 bar (108 psi) with tool
P/N 506277-1
No specific 1 Stiff nylon bristle brush
No specific 1 Oven with a capacity of 180 °C (356 °F)) (2) Consumables
NOTE: Use the special tools and equipment given in the list in the page block
“SPECIAL TOOLS, FIXTURES, EQUIPMENT AND CONSUMABLES”.
PART NUMBER NAME
90017838 Washing liquid FIMM M18 or equivalent 90017839 Washing liquid FIMM M36 or equivalent 7954A009 Red anti-flash varnish type 2407 or equivalent No specific Adhesive cloth
No specific Brush
No specific Fine emery cloth to get a very clean surface
(3) Referenced information
REFERENCE DESIGNATION
IPL Figure 2 Starter generator
CLEANING
THALES AVIONICS ELECTRICAL SYSTEMS
mechanical parts and the windings of the starter generator.Subtask 24-32-61-160-001-A01
(1) Cleaning of the frame assembly
The cleaning operation is performed in two stages:
− pre-cleaning.
− cleaning.
− It is mandatory, before starting this operation to remove:
• the terminal block (2-280) as detailed in the page block DISASSEMBLY, Subtask 24-32-61-040-011-A01.
CAUTION : ONCE THE TERMINAL BLOCK IS REMOVED, THE VARIOUS CONNECTIONS WILL BE FREE. DURING THE CLEANING OPERATIONS, TAKE ALL THE NECESSARY STEPS TO AVOID ANY DAMAGE TO THE FIBREGLASS INSULATING SLEEVES.
• the speed detector (2-100) as detailed in the page block DISASSEMBLY,Subtask 24-32-61-040-012-A01.
NOTE : Following this operation, recover the insulating sleeves.
(a) Pre-cleaning the frame assembly
− Start up the cleaning cabin (suction syste, pump for water screen, washing liquid FIMM M18 P/N 90017838 and M36 P/N 90017839).
− Place the frame assembly in the cleaning cabin.
− Blow the inside of the frame to remove any carbon dust (pressure provide P=7,5 bar (108 PSI).
(b) Cleaning the frame assembly
− Place the frame assembly in the tank of the ultrasonic cleaning machine.
− Start up the machine.
− Do a complete cleaning cycle (duration 1 hour).
− Install the frame assembly in an oven at a temperature of 180 °C (356 °F) for 4 hours.
− At the end of the operation, examine that the insulation between the negative connection and ground is greater than 1 MΩ. If not, do a new cleaning cycle.
THALES AVIONICS ELECTRICAL SYSTEMS COMPONENT MAINTENANCE MANUAL
P/N 8260-12*
− If after a complete cleaning cycle the insulation is less than 1 M Ω:
• perform a new pre-cleaning cycle,
• brush vigorously the connections and then do another cleaning cycle of the frame assembly.
NOTE: Do as many cleaning cycles as needed to get an insulation value of greater than 1 MΩ.
Subtask 24-32-61-160-002-A01
(2) Cleaning the mechanical parts
− Place the parts to be cleaned in the tank of the ultrasonic cleaning machine.
NOTE: If the parts to be cleaned are very dirty, pre-clean the parts in the cleaning cabin.
− Start up the machine.
− Do a complete cleaning cycle (duration 1 hour).
Subtask 24-32-61-160-003-A01
(3) Cleaning of the armature
This operation is performed in two stages:
− pre-cleaning,
− cleaning.
CAUTION: DURING THE PRE-CLEANING AND CLEANING OPERATIONS, DO NOT TOUCH THE COMMUTATOR WITH YOUR FINGERS AND TAKE ALL NECESSARY STEPS TO AVOID DAMAGE TO THE MICA UNDER
THE COMMUTATOR BLADES.
(a) Pre-cleaning
− Start up the cleaning cabin (suction system, power for water screen, washing liquid FIMM M18 P/N 90017838 and M36 P/N 90017839).
− Using the standard blower connected to a dry compressed air generator, clean all the cavities in the armature.
• on the commutator, insert the tool nozzle roller bearing side,
• Examine that the air compressor provides 2,06 bar (30 PSI).
CAUTION: DON'T POINT DIRECTLY THE DRY COMPRESSED AIR SPRAY ON THE MICA (SEE FIGURE 4001).
− Press the blower trigger.
THALES AVIONICS ELECTRICAL SYSTEMS COMPONENT MAINTENANCE MANUAL
P/N 8260-12*
− Perform this operation blade by blade 360° around the commutator.
CAUTION: BE SURE TO TAKE ALL THE NECESSARY PRECAUTIONS MENTIONED ABOVE.
− Insert the blower nozzle P/N 506277-1 between the radial connections connecting the commutator blades to the armature conductors as shown in the Figure 4001.
− Ensure the dry compressed air generator provides a pressure of 7,5 bar (108 PSI).
− Press the blower trigger.
− Perform this operation 360° around the rotor.
− Complete the pre-cleaning operation by using the nozzle to blow all the accessible external parts of the armature.
CAUTION: BE SURE TO TAKE ALL THE NECESSARY PRECAUTIONS MENTIONED ABOVE.
(b) Cleaning
− Put the rotor vertically in the tank of the ultrasonic cleaning machine.
− Do a complete cleaning cycle (time 1 hour).
− Install the armature in an oven at a temperature of 180 °C (356 °F) for 4 hours.
− At the end of the cleaning operation, check that the insulation between the commutator and the metal part is greater than 1 MΩ. If not, repeat the cleaning cycle.
NOTE : Do the cleaning cycle as many times as necessary to get the necessary insulation value greater than 1 MΩ.
After cleaning operation, check that all the periphery surface of the armature is coat with red anti-flash varnish 2407 P/N 7954A009.
If there is some faults carry out the touching up with a brush.
If the faults are more important:
− Scrape varnish flakes and slightly sand with a fine emery cloth to get a very clean surface.
− Protect the unvarnished areas with adhesive cloth.
− Use a spray gun to apply red anti-flash varnish 2407 P/N 7954A009 on the armature.
− Remove the adhesive cloth masks.
THALES AVIONICS ELECTRICAL SYSTEMS
(4) Cleaning the commutator bearing assembly This operation is performed in two stages:
− pre-cleaning,
− cleaning.
(a) Pre-cleaning
− Start up the cleaning cabin (suction system, pump for water screen, washing liquid FIMM M18 P/N 90017838 and M36 P/N 90017839).
− Place the commutator bearing assembly in the cleaning cabin.
− Blow the inside of the commutator bearing assembly to remove any carbon dust pressure provide P = 7,5 bar (108 PSI).
(b) Cleaning
− Put the commutator bearing assembly in the tank of the ultrasonic cleaning machine.
− Start up the machine.
− Do a complete cleaning cycle (duration 1 hour).
− Install the commutator bearing assembly in an oven at a temperature of 180 °C (356 °F) for 4 hours.
− At the end of the operation, examine that the insulation between the brushes guide and ground is greater than 1 MΩ. If not, do a new cleaning cycle.
NOTE : Do the cleaning cycle as many times as necessary to get the necessary insulation value greater than 1 MΩ.
After cleaning operation, check that all the periphery surface of the commutator bearing assembly is coat with red anti-flash varnish 2407 P/N 7954A009.
If there is some faults carry out the touching up with a brush.
If the faults are more important:
− Scrape varnish flakes and slightly sand with a fine emery cloth to get a very clean surface.
THALES AVIONICS ELECTRICAL SYSTEMS COMPONENT MAINTENANCE MANUAL
P/N 8260-12*
− Protect the unvarnished areas with the adhesive cloth.
− Use a spray gun to apply red anti-flash varnish 2407 P/N 7954A009 on the commutator bearing assembly.
− Remove the adhesive cloth masks.
− Heat the varnish at 150 °C (302 °F) for about 2 hours to cure it.
Subtask 24-32-61-160-005-A01
(5) Speed detector assembly
− Using a stiff nylon bristle brush, remove all the adhesive residues, from the speed detector body at the nut locations and on the flange.
E. Close-up Not applicable.
GRAPHIC 24-32-61-991-4001-A01 CLEANING
FIGURE 4001
THALES AVIONICS ELECTRICAL SYSTEMS COMPONENT MAINTENANCE MANUAL
P/N 8260-12*
TASK 24-32-61-200-801-A01