Table 3-1. AVUM Preventive Maintenance Checks and Services
for Ground Handling Wheels Assembly.
ITEM TO BE
SERVICE FLUID RESERVOIR
Fluid reservoir is cracked
To prevent injury to personnel or
damage to equipment, all pressure must be
released from the pump before staring any
To prevent contamination from entering
the pump, the exterior of the pump should be
cleaned before beginning this procedure.
Refer to Figure 3-1 for parts identification.
1. Drain pump reservoir of
Hydraulic fluid is
a. Remove hydraulic pressure by rapidly
Control valve is defective.
turning control valve pressure release knob
b. Remove filler cap (1) and packing ring (2). Cap or ring damaged.
c. Stand Wheel Assembly on end, with the
Rams do not fully retract
pump filler hole down. to drain fluid from the
pump. Rotate axle to assure that the rams
are fully retracted
d. Disconnect hoses (3) from tees and drain
Hoses or rams damaged
the hoses and hydraulic rams on both sides
of the pump Ensure hydraulic rams are fully
e. Reinstall hoses (3).
Hose is defective.