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 TM 55-1905-220-14-7
3-209. HYDRAULIC CUB PUMP UNIT - HYDRAULIC RESERVOIR TANK AND STRAINER -
MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INITIAL STARTUP (Cont)
CAUTION
Add oil to the tank to maintain the proper oil level as the system fills.
Operation will be smooth when all air is purged from the system by continuing to move the rudder for
several minutes.
f.
The pump relief valve is set at the factory; however, if a different pressure setting should be
required proceed as follows. Note the reading of the pressure gauge as the directional valve is manually
activated for right or left rudder. After the rudder reaches the hard-over position, adjust the pump relief valve, if
necessary, until the indication is 2200 psi or less, as required.
g.
The cylinder relief valves are set at the factory to 200 psi above the pump relief valve setting. If
resetting is required, follow the procedure in Step f. The pump relief setting must be temporarily increased
while setting the cylinder relief valve.
3-3242
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