TM 5-3895-346-14
MAINTENANCE
POWER STEERING
TROUBLESHOOTING CHART
TROUBLE
PROBABLE CAUSE
REMEDY
PUMP NOT DELIVERING
DRIVEN IN WRONG DIREC-
Check direction of pump shaft
OIL
TION OF ROTATION
rotation. Refer to Operation
on Flow Control and Relief
Valve.
PUMP DRIVE SHAFT DISEN- Remove pump; determine damage
GAGED OR SHEARED. BELT to cartridge parts (see dis-
SLIPPING OR BROKEN
assembly instructions) re-
place sheared shaft and
needed parts.
FLOW CONTROL VALVE
Disassemble pump and wash
STUCK OPEN
control valve in a clean sol-
vent. Return valve to its
bore and slide it back and
forth. No stickiness in
movement should occur. If
a gritty feeling is noted on
the valve O.D. it may be pol-
ished with crocus cloth.
Avoid removal of excess ma-
terial or rounding of valve
edges during this operation.
Do not attempt to polish the
valve bore. Wash all parts
before reassembly of pump.
Flush entire system thorough-
ly and fill with clean oil as
recommended in Operation.
VANE OR VANES STUCK IN
Disassemble pump, examine ro-
ROTOR SLOTS
tor slots for dirt, grime or
small metal chips. Clean
rotor and vanes in a good
grade solvent (mineral
spirits or kerosene), reas-
semble parts and check for
free vane movement.
OIL VISCOSITY TOO HEAVY
Use fluid of the proper vis-
TO PICK UP PRIME
cosity as recommended in oil
data Table I.
PUMP INTAKE PARTIALLY
Drain system completely; flush
BLOCKED
to clear pump passages. Flush
and refill system with clean
oil as per recommendations.
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