Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS) (continued).
Not Fully Mission
a. Open hydraulic cabinet assembly (1). a. The LHS does not operate properly in
Fully operate the LHS using the manual override mode.
override controls. Check to make sure the
LHS operates properly in override mode.
Check for leaking, sticking, or mal-
functioning directional control valves (2).
For Model A only, operate the LHS long
enough to verify that the hourmeter (3)
b. Check for leaks on main block and
b. Any Class III leaks are found.
MODEL A ONLY
Fully extend the LHS prior to per-
forming this procedure.
Check hydraulic cylinder piston rods (1) Any Class III leaks are found, or there are
for scoring, scratches, bends, or signs of
splits, cracks, gouges, bends, or damage
leaking. Check cylinders (2) for splits, that will impair operation.