TM 1-1520-240-MTF
4-47
13. RAMP CONTROL VALVE handle — UP. Check
that ramp moves to the full up position and cargo
door remains retracted.
14. RAMP CONTROL VALVE handle — DN and
hold until ramp is at mid-position, then STOP.
Check that ramp stops at mid-position with
cargo door fully retracted.
CAUTION
Do not manually operate cargo door with ramp
in full up position. Damage to door and fuse-
lage will occur.
15. RAMP CONTROL SEQUENCE VALVE — Turn
pin to vertical position.
16. RAMP
CONTROL
SEQUENCE
VALVE
MANUAL OPER knob — Pull up and hold.
Check that cargo door extends fully.
17. RAMP
CONTROL
SEQUENCE
VALVE
MANUAL OPER knob — Release. Check that
cargo door retracts fully into ramp.
18. RAMP PWR switch on overhead panel — OFF.
19. RAMP CONTROL VALVE handle — UP. Check
that ramp does not move.
20. RAMP CONTROL VALVE handle — STOP.
21. RAMP PWR switch on overhead panel — ON.
22. RAMP CONTROL VALVE handle — DN. Check
that ramp moves to the full down position
(resting on the ground), and cargo door remains
retracted.
23. RAMP CONTROL VALVE handle — UP. Check
for the following sequence of actions:
a. Ramp
moves
upwards
and
stops
approximately 8 inches from the fully closed
position.
