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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
CLEANING AND FLUSHING
3. If the system has accumulated sufficient deposits to interfere with normal operation, it must be
flushed with light mineral oil, or it may require more extensive cleaning.
If light mineral oil is used, it must contain a rust-inhibitor to protect the metal surfaces against
rust after draining.
Systems sludged so much that they cannot be thoroughly cleaned with mineral oil must be
dismantled and cleaned mechanically. Solvents and chemical cleaners are not recommended
for use in hydraulic systems because they do not offer sufficient lubricating value, and result in
damage to moving parts. It is very difficult to remove all solvent or cleaner from the system
and any remaining solvent will dilute the fresh hydraulic oil, forming gummy deposits, or an
emulsion.
REMOVAL
4. Hydraulic
a. Reservoir
Drain or pump oil
Refer to step 2.
Reservoir
from reservoir.
Tank
b. Wiring
Tag and disconnect
wiring to motor and
directional control
valve.
c. Eight
Remove.
screws
(6),
and
lock-
washers
(7
d. Two
Lift up to release
manifold
piping.
fittings
(8)
3-3236
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