SECTION 5
TROUBLESHOOTING
TABLE 5-6. TROUBLE ANALYSIS FOR STEERING SYSTEM (CONT.).
CORRECTIVE ACTION
PROBABLE CAUSE
TROUBLE
VANE PUMP
Cam ring instolled for opposite
Disassemble pump and install cam
Pump Not Delivering
Oil
pump rotation.
c o r r e c t l y . Direction of rotation is
indicated by the arrow on the sur-
face of the ring.
Pump drive shaft engaged or
Determine damage to cartridge
sheared, belt slipping.
ports. Replace sheared shaft and
needed ports.
Flow control valve stuck open.
W ash control valve in clean sol-
vent, slide it bock and forth in
its bore. No stickiness in move-
ment should occur. If gritty
feeling is noted, polish spool
with fine crocus cloth. Avoid
removal of excess material or
rounding of the spool edges. Do
not polish the bore. Wash all ports
before reassembly of the pump.
Vane or vanes stuck in rotor
Examine rotor slots for dirt, grime
slots.
and small metal chips. Clean
rotor slots and vanes. Reassemble
parts and check for free vane
movement.
Oil viscosity too heavy to pick
Use oil of proper viscosity
up prime.
(Refer to Section 4).
Clean and check intake hose. Re-
Restricted intake hose; may be
place if soft or deteriorated.
collapsing.
Clean and check intake hose. Re-
Pump Making Noise
Restricted intake hose; may be
place if soft or deteriorated.
collapsing.
Test by pouring oil on joints and
Air entering system on the intake
around drive shaft. Listen for change
side of the pump.
in noise during operation. Tighten
joints affected. Replace hose or
pump shaft seal, if necessary.
Tighten manifold. Replace O-ring
Loose manifold or defective
if necessary.
manifold seal.
5-52.
