TM 1-1520-238-T-4
3–31
3–14.
PARKING BRAKE HANDLE – RETRACTS WHEN BRAKES ARE SET TO PARK
3–14
(BRAKES DO NOT SET)
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
NOTE
Ensure that parking brake is released
prior to proceeding.
1. Visually inspect parking brake cable assembly
and spring.
Is cable assembly or spring bent or broken?
YES
Replace cable assembly and/or
spring (TM 1-1520-238-23).
NO
Go to step 2.
2. Pull parking brake handle to full travel and
observe parking brake valve lever.
Does parking brake valve lever fully travel
from stop to stop?
YES
Go to step 3.
NO
Adjust brake cable clevis at
parking brake valve to obtain full
travel of parking brake lever
(TM 1-1520-238-23).
3. Apply and maintain pressure on pilot left
directional control pedal.
Can left wheel assembly be rotated?
YES
Service and bleed brake system
(TM 1-1520-238-23).
NO
Go to step 4.
4. Apply and maintain pressure on pilot right
directional control pedal.
Can right wheel assembly be rotated?
YES
Service and bleed brake
assembly (TM 1-1520-238-23).
NO
Go to step 5.
5. Apply and maintain pressure on both left and
right pilot directional control pedals. Pull parking
brake handle and observe parking brake valve
lever.
Does parking brake release pin protrude out
to parking brake lock lever?
YES
Go to step 6.
NO
Replace parking brake valve
(TM 1-1520-238-23).
6. Release directional control pedal and brake
handle.
Does parking brake valve lever lock to park
position?
YES
Go to paragraph 3–10.
NO
Go to step 7.
7. Check release pin.
Is release pin sheared or broken?
YES
Replace parking brake valve
(TM 1-1520-238-23).
NO
Go to step 8.
8. Check parking brake valve lever.
Is lever loose on parking brake valve shaft?
YES
Tighten screw of parking brake
lever (TM 1-1520-238-23).
NO
Go to paragraph 3–10.
END OF TASK
