TM 5-3895-346-14
TROUBLESHOOTING
HYDROSTATIC SYSTEM
TROUBLESHOOTING PROCEDURE
I. SYSTEM WILL NOT OPERATE IN EITHER DIRECTION
CAUSE
INDICATED BY
REMEDY
A.
System low on
Low or zero charge
1. Locate and fix leaks causing
fluid
pressure
the loss of fluid.
2. Replenish fluid in reservoir
to proper level.
B.
Faulty control
1. Check the entire linkage,
linkage
from control lever to pump
arm, to make sure it is con-
nected and free to operate as
it should. Adjust linkage to
pump arm. DO NOT move pump
arm to meet linkage.
C.
Disconnected
1. Check to see that the
coupling
coupling from the engine to
the pump shaft or the
coupling from the motor shaft
to the driven mechanism is
not slipping or broken.
D.
Filter or suction
High vacuum and low
1. Replace or clean filter
line from reser-
charge pressure
and/or suction line.
voir to charge
pump plugged or
collapsed
E.
Charge pressure
Low or zero charge
1. Replace faulty assembly.
relief valve in
pressure
(Refer to Repair Procedure.)
charge pump or
motor manifold
NOTE
damaged or stuck
open,
If problem is in charge
pump, pressure will be low
or zero when pump is in
neutral.
If in manifold,
pressure will be low when
in stroke.
F.
Charge pump drive
Zero charge pressure
1. Replace charge pump as-
key or shaft
when pump is in neutral
sembly. (Refer to Repair
broken
or when trying to go
Procedure.)
into stroke
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