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3–12. LEFT OR RIGHT MAIN WHEEL ASSEMBLY – DOES NOT ROTATE FREELY | Up
TM-1-1520-238-T-4 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Manual | Next
3–14. PARKING BRAKE HANDLE – RETRACTS WHEN BRAKES ARE SET TO PARK 3–14 (BRAKES DO NOT SET) |
TM 1-1520-238-T-4
3–30
3–13.
PILOT BRAKE – IS NOT FIRM OR WHEEL ASSEMBLY ROTATES (WITH
3–13
PRESSURE APPLIED)
Tools:
Nomenclature
Part Number
Tool Kit, Aircraft
SC518099CLA01
Mechanic’s
Jack, Hydraulic Axle,
MIL-J-26013
5-Ton (2)
Personnel Required:
67R
Attack Helicopter Repairer
One person to assist
References:
TM 1-1520-238-23
WARNING
Brake fluid may be pressurized. To avoid
possible eye injury, wear face shield.
NOTE
Ensure that parking brake is released
prior to proceeding.
1. Service and bleed brake system
(TM 1-1520-238-23).
Are pilot brakes firm?
YES
Go to paragraph 3–10.
NO
Go to step 2.
2. Check CPG brakes.
Are CPG brakes firm?
YES
Go to step 3.
NO
Go to step 4.
3. Inspect brake lines between pilot’s master
cylinder and transfer valves.
Are brake lines leaking?
YES
Repair leaking brake lines and
service and bleed brake system
(TM 1-1520-238-23).
NO
Go to step 6.
4. Detach left or right upper trailing arm hose at
fuselage quick disconnect.
Are pilot brakes firm?
YES
Go to step 5.
NO
Go to step 7.
5. Attach hose assembly and apply pilot’s brakes.
Is leakage present at trailing arm lines or
wheel brake assembly?
YES
Repair and/or replace as
necessary to correct leakage.
Service and bleed brake system
TM 55-1520-238-23).
NO
Inspect wheel brake system for
wear and replace as necessary3
(TM 1-1520-238-23).
6. Apply and maintain pressure on CPG left or right
brake.
Are pilot brakes firm?
YES
Go to step 8.
NO
Replace pilot master cylinder
(TM 1-1520-238-23).
7. Remove fluid level screw on CPG master
cylinder and apply brakes.
Does fluid flow from CPG master cylinder?
YES
Replace transfer valve
(TM 1-1520-238-23).
NO
Repair or replace as necessary
to correct leakage. Service and
bleed brake system
(TM 1-1520-238-23).
8. Inspect brake lines between transfer valves and
parking valves.
Are brake lines leaking?
YES
Repair leaking brake lines.
Service and bleed brake system
TM 55-1520-238-23).
NO
Replace parking brake valve
(TM 1-1520-238-23).
END OF TASK
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