TRUCK SERVICE MANUAL
Cause of Bad Steering Outside of Steering
Power Steering Trouble Shooting
A thorough and orderly trouble shooting
Loose king pins.
procedure will help you diagnose power steering troubles
Low pressure in one or more tires, particularly
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.
Improper fifth wheel location.
Trouble shooting procedure should be followed
Sheared off spring leaf bolt on steering
in a three step organized manner:
gear side of truck.
Define the complaint.
Improper front end alignment (caster,
camber and toe- in).
Hydraulic system check.
TROUBLE SHOOTING CHART
Change oil and cartridge.
1. Oil forcing out of filler cap
a. Dirty cartridge in reservoir.
cartridge at short interval if necessary to
vent hole in reservoir.r
clean up system
b. Loose belts.
Bleed system and check adjustable stops.
c. Air in system.
Refer to pump servicing instructions.
d. Malfunctioning pump.
Oil leakage at pump pulley
Worn oil seal
Replace oil seal (change oil and filter,
cartridge at more frequent intervals).
3. Oil leakage between reservoir
Overheating or age..
Replace O-ring between reservoir and
4. Oil leaking at actuating shaft
a. Worn or damaged oil seal.
Replace oil seal.
of steering gear.
b. Worn or damaged actuating
Replace with actuating shaft assembly.
5. Oil leaking at output shaft of
a. Worn or damaged output shaft.
Replace output shaft.
b. Restricted oil return line.
Check for obstructions and sharp bends in
c. Clogged filter.
Change oil and cartridge. Replace filter
cartridge at shorter intervals.
d. Worn or damaged quad ring.
Replace quad ring.
e. Worn cover bushing and/or
output shaft bushing