Table 3-1. AVUM Preventive Maintenance Checks and Services
for Ground Handling Wheels Assembly.
ITEM TO BE
SERVICE FLUID RESERVOIR
Fluid reservoir is cracked
f. Remove nut (4) located on the end of the.
Nut, pump body, or packing
pump and separate pump body (5), and
packing ring (6) ring damaged
from reservoir (7).
g. Clean fluid filter (8), and reservoir (7),
Filter is dogged
with nonflammable cleaning fluid
h. Reassemble pump with new packing rings (6) Packing rings leak
i. Drain and clean the other hydraulic system Hoses, rams, or fittings
components (hoses, hydraulic rams, fittings)
damaged or contaminated
before reconnecting them to the pump
2. Fill pump reservoir
Fluid leaks from reservoir
with hydraulic fluid.
(Item 1, Appendix D)
The reservoir is protected by a gasket in the
filler cap, which will extrude and blow if more
oil is contained in the system than the
reservoir can handle. To prevent damage
to the reservoir gasket, the rams must be
fully retracted before refilling the reservoir
a. Fully retract hydraulic rams.
Rams won't fully retract
b. Clean the entire area around filler cap
Area around filter cap
c. Insert a clean funnel and filter into the
Fluid is not filled to proper
filler hole Add MIL-H-5606 fluid to the level
indicated in Figure 3-1