TM 55-1520-240-T
7-6.3
WHEEL BRAKE SYSTEM OPERATIONAL CHECK (Continued)
7-6.3
TASK
RESULT
1.
Check that PARK BRAKE ON (Without 74) or PARK
If capsule is lit, press and release pilot pedals. If capsule
BRK ON (With 74 ) caution capsule (1) is out.
is still on, go to Task 7-6.4.
2.
Have helper manually turn all six wheels (2).
All wheels shall turn freely. If any wheel does not turn, go
to Task 7-6.5.
3.
Press pilot brake pedals (3). Have helper manually turn
All wheels shall come to a full stop. If not, go to Task 7-6.6.
all forward and aft wheels.
4.
Release pilot brake pedals. Press copilot brake ped-
All wheels shall come to a full stop. If not, go to Task 7-6.7.
als (3). Have helper manually turn all forward and aft
wheels (2).
5.
Press copilot brake pedals. Press pilot brake pedals
Fwd and aft wheels shall be locked and PARK BRAKE
(3). Pull out parking brake handle (4). Release brake
ON light shall come on. If parking brake will not lock, go to
pedals. Release handle.
Task 7-6.8. If PARK BRAKE ON light does not come on,
go to Task 7-6.9.
6.
Press and release pilot brake pedal (3) and have
Parking brake handle shall return to off position. Forward
helper turn wheels.
and aft wheels shall unlock. PARK BRAKE ON (Without
74) or PARK BRK ON (With 74) light shall go out. If
parking brake handle does not return to off, go to Task
7-6.10. If PARK BRAKE ON (Without 74) or PARK
BRK ON (With 74) light does not go out or wheels stay
locked, go to Task 7-6.4.
7.
Remove hydraulic power. Press and release pilot ped-
Wheels shall be locked. If wheels turn, go to Task 7-6.11.
als (3) twice. Then press and hold pilot pedals. Have
If trouble symptom, brake pressure bleeds down within 8
helper manually turn all six wheels (2).
hours with parking brake on, was reported, go to Task
7-6.12.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery disconnected.
Electrical power off.
Hydraulic power off.
Aircraft jack removed.
END OF TASK
Change 17 7-181
