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 657 of 894
TRUCK SERVICE MANUAL
STEERING
TROUBLE SHOOTING
Power Steering Trouble Shooting
A thorough and orderly trouble shooting
procedure will help you diagnose power steering troubles
quickly.
Troubles occur and show up in various ways; but
with the trouble shooting chart you
can eliminate many
possibilities quickly, narrow down the cause of trouble,
then make the
correct repairs promptly.
Trouble shooting procedure should be followed
in a three step organized manner:
1.
Define the complaint.
2.
External inspection.
3.
Hydraulic system check.
Cause of Bad Steering Outside of Steering
System
1.
Soft tires.
2.
Loose king pins.
3.
Low pressure in one or more tires, particularly
rear tires.
4.
Swinging load.
5.
Improper fifth wheel location.
6.
Sheared off spring leaf bolt on steering
gear side of truck.
7.
Improper front end alignment (caster,
camber and toe- in).
TROUBLE SHOOTING CHART
PROBLEM
POSSIBLE CAUSE
REMEDY
1. Oil forcing out of filler cap
vent hole in reservoir.r
a.
Dirty cartridge in reservoir.
b.
Loose belts.
c.
Air in system.
d.
Malfunctioning pump.
Change oil and cartridge.
Replace filter
cartridge at short interval if necessary to
clean up system
Tighten belts.
Bleed system and check adjustable stops.
Refer to pump servicing instructions.
2.
Oil leakage at pump pulley
shaft
Worn oil seal
Replace oil seal (change oil and filter,
cartridge at more frequent intervals).
3.
Oil leakage between reservoir
and pump.
Overheating or age.
.
Replace O-ring between reservoir and
pump.
4.
Oil leaking at actuating shaft
of steering gear.
a.
Worn or damaged oil seal.
b. Worn or damaged actuating
shaft.
Replace oil seal.
Replace with actuating shaft assembly.
5.
Oil leaking at output shaft of
steering gear.
a.
Worn or damaged output shaft.
b. Restricted oil return line.
c.
Clogged filter.
d. Worn or damaged quad ring.
e. Worn cover bushing and/or
output shaft bushing
Replace output shaft.
Check for obstructions and sharp bends in
line.
Change oil and cartridge.
Replace filter
cartridge at shorter intervals.
Replace quad ring.
Replace bushings.
650
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