Bendix Commercial Vehicle Systems COMPACT 500 9/87 - Manual (Page 26)

26
TROUBLESHOOTING CHART
SYMPTOM CAUSE REMEDY
1. Power steering does A. Low oil level. A. Check oil level.
not operate.
B. Air in system. B. Check that there are
no leaks, bleed and
top up with oil.
C. The pressure pump does C. Check pump performance to
not supply an adequate specification.
flow or pressure.
D. Obstruction in the oil D. Remove lines and clean.
reservoir outlet or
inlet.
E. Communication between E. Change piston seal rings.
sides of power steering
piston.
F. Mechanical faults in F. Overhaul and test in
vehicle steering members, accordance with vehicle
not belonging to power service manual.
steering gear.
G. Low pressure in front G. Inflate tires to correct
tires. pressure.
H. Relief valve opens at H. Disassemble and repair.
low pressure.
I. Faulty operation of the I. Replace ball screw assembly.
rotary valve.
2. Power steering stiff A. No pressure being applied A. Check and if necessary
in one direction and to top or bottom side of replace seal rings (31, 32)
normal in the other. power steering piston.
B. Faulty operation of the B. Replace ball screw
rotary valve. assembly.
C. Mechanical fault in vehicle C. Overhaul and check in
steering members not accordance with vehicle
belonging to power service manual.
steering units.
D. Excess leakage through D. Disassemble and repair.
piston limiting valve in one
direction.
3. Power steering tends A. Rotary valve incorrectly A. Replace ball screw
to turn by itself set. assembly.
when engine is running.
4. Excessive free play A. Power steering housing A. Retighten mounting bolts.
in steering wheel. or housing support loose.
B. Excessive play between B. Adjust gear lash. If all
output shaft sector teeth adjustment has been used,
and piston. replace piston and output
shaft.
C. Loose or worn ball studs in C. Mechanical faults in vehicle
steering linkage. Loose or steering members. See
worn intermediate steering vehicle manual.
shafts.