TM 5-3895-346-14
HYDROSTATIC SYSTEM
TROUBLESHOOTING
CAUSE
INDICATED BY
REMEDY
C.
Servo cylinder out
1. Remove pump and return to
of adjustment
factory for readjustment.
(Refer to Repair Procedure,
for removal instruction.)
IV.
SYSTEM OPERATING HOT (MOTOR CASE TEMPERATURE ABOVE 180 )
F
CAUSE
INDICATED BY
REMEDY
A.
Fluid level low
Low charge pressure
1. Replenish fluid supply.
B.
Fluid cooler
1. Clean cooler air passages.
clogged
C.
Fluid in cooler
1. Repair or replace valve.
being bypassed
(Cooler bypass
valve, if used,
stuck open)
D.
Clogged filter
High vacuum and low
1. Replace filter; clean or
or suction line
charge pressure
replace suction lines.
E.
Rotary bypass
Slower than normal
1. Close bypass valve.
valve, if used,
motor speed
partially open
(located on
Lower than normal or
motor manifold)
loss of system pressure
F.
Excessive internal
Lower than normal sys-
1. Check the high-pressure
leakage
tem pressure in one
relief valves; one may be
or both directions
stuck partially open.
Lower than normal
2. Refer to: System Will
charge pressure; may
Not Operate In Either
drop to or near zero
Direction, Item G-1.
when maximum obtain-
able system pressure
3. Replace the pump or
is reached
motor or both units. (Refer
to Repair Procedure.)
Loss of acceleration
and power
G.
Case drain lines
1. Check plumbing, reinstall
improperly plumbed
to proper arrangement.
H.
Continued opera-
1. Consult operator's manual
tion at high-
for proper machine operation.
pressure relief
valve setting
499
