TM-5-3805-254-14-P-2
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)
JUNE 1980
TM-5-3805-254-14-P-2 - Page 658 of 894
STEERING
TRUCK SERVICE MANUAL
PROBLEM
POSSIBLE CAUSE
REMEDY
6. Excessive pump pressure-
with steering gear
in neutral
position
Kink in oil return line
Relocate line to remove kink.
7.
Erratic steering or no steering
at all
a. Insufficient volume of oil being
metered
by flow divider to
steering
gear induced by foreign particles on
flow divider valve, causing the valve
to hang up in the bore.
b.
Flow
divider
spring
takes
permanent set because of fatigue,
thereby allowing flow divider valve
to move easily and reduce oil
volume.
c. Broken bypass spring in flow
divider.
Polish flow divider valve to remove
foreign particles and burrs.
Refer to
pump servicing instructions.
Replace flow divider spring.
Refer to
pump servicing instructions.
Replace with flow divider valve assembly,
which includes bypass spring.
Refer to
pump servicing instructions.
8.
Side motion in steering wheel.
Broken jacket bearing in steering
column.
Replace jacket bearing.
9.
Excessive backlash
a.
Worn universal joint.
b.
Worn pins and keys, universal
joint to actuating shaft and universal
joint to steering shaft.
.
c. Low oil volume.
d.
Pitman
arm
ball
worn
“eggshaped.”
e.
Improperly adjusted drag link,
pitman arm to drag link and steering
arm to drag link.
f.
Loose bracket, frame to bracket
or bracket to gear
g.
Worn or damaged actuating
valve.
h.
Rack or piston worn or
damaged.
i.
Worn or damaged pinion gear on
output shaft.
Replace universal joint
Replace pins and keys
Check flow divider and pump speed
belt(s).
Replace pitman arm assembly where
riveted or ball only where bolted ball is
used.
Adjust drag link, drag link to pitman arm
and drag link to steering arm.
Remove bracket, clean frame and
bracket; check radius of frame making
sure bracket is not bearing on radius
surface; check bracket for wear from
working.
Replace bracket and tighten to
recommended torque rating according to
size and grade of bolts.
If necessary,
replace bracket with new one.
Replace with actuating piston and valve
assembly.
Replace with actuating piston and valve
assembly
Replace pinion gear.
651
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