TM 5-3895-346-14
TROUBLESHOOTING
HYDROSTATIC SYSTEM
CAUSE
INDICATED BY
REMEDY
V.
SYSTEM NOISY
A.
Air in system
Considerable amount of
1. Check for low fluid
foam in reservoir
level.
Low and fluctuating
2. Check inlet system; fil-
charge pressure
ter, suction line, etc. for
leaks allowing air to be
Spongy control
drawn into system.
3. End of case return within
the reservoir not submerged
in fluid.
B.
Plumbing not
1. Make sure hose or tubing
properly insulated
is not touching any metal
that can act as a sounding
board.
2. Insulate hose and tubing
clamps with rubber to absorb
noise.
VI.
ACCELERATION AND DECELERATION SLUGGISH
CAUSE
INDICATED BY
REMEDY
A.
Air in system
1. See step V-A.
B.
Control orifice
1. Remove the bolts that
plug partially
hold the control housing to
blocked
pump and check the orifice.
(Refer to Repair Procedure.)
CAUTION
Do not allow O-rings to
fall into the pump case.
2. If orifice is clean, re-
move the charge pump and the
plug at the charge pressure
gage port and blow clean air
through the passage between
the charge pump and control
orifice port.
C. Rotary bypass
Lower than normal
1. Close bypass valve.
valve, if used,
system pressure
partially open
(located on
motor manifold)
500
