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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
7.
Hydraulic System.
The following procedure should be followed to ensure that the pump unit is not damaged during initial
startup:
a.
Fill tank to proper level as indicated on the oil level gauge. Disconnect tubing between the pump
and manifold and fill the pump with oil. Reconnect tubing.
b.
Remove a plug from the front of a brake valve and install a 0-3000 psi pressure gage.
c.
Check direction of motor shaft rotation by starting the motor long enough to determine the
direction of rotation. Ensure that motor rotation is in the same direction as the arrow on the pump. If the motor
rotates in the wrong direction, reverse two of the motor leads to change the direction of rotation.
CAUTION
Do not allow the pump to run at full speed for more than 30
seconds if it does not pick up suction. If the pump does not pick
up suction, it may be due to oil with too high a viscosity, low oil
level in the tank, a leak in the tank, or a leak in the suction line
to the tank.
d.
Prime the pump by turning the motor on and off several times in rapid succession.
e.
Operate the hydraulic system and fill it with oil by moving rudder from hardover to hardover.
3-3241
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