TM 55-1520-240-23-6
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FLUSH NO. 1 AND NO. 2 PTU AND CARGO HOOK PRESSURE TUBING
(Continued)
7-317
11.
Working in heater compartment, disconnect tube
(16) from hoist shutoff valve (17) pressure port
(18).
12.
Connect stand return valve (19) to port (18) of
valve (17).
Do not exceed 500 psi. Otherwise,
damage to components can occur.
Keep test stand bypass valve closed.
Otherwise, contaminants could
re-enter the system.
13.
Apply hydraulic power. Set stand to 10 gpm at
500 psi. Flush system for 15 minutes. Check
for leaks.
14.
Remove hydraulic power.
15.
Disconnect hose (19) from port (18) of valve (17).
Use container and cloths (E135) for spilled fluid.
16.
Connect tube (16) to port (18) of valve (17).
INSPECT
17.
Working from aft left pylon, remove plug (6) from
tube (4).
18.
Connect stand return hose (19) to tube (4).
19.
Apply hydraulic power. Set stand to 10 gpm at
500 psi. Flush system for 15 minutes. Check
for leaks.
20.
Remove hydraulic power.
21.
Disconnect hose (19) from tube (4). Use
container and cloths (E135) for spilled fluid.
22.
Connect tube (4) to PTU PRESS port (5).
INSPECT
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