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