Sakai SW354, Shop Manual

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10-082
TROUBLESHOOTING
3-4-3. Steering wheel backlash or play is large
Check point Cause Check/Action
1. Steering Column Spline of column shaft or orbitrol is worn. Replace column shaft or orbitrol.
Column shaft bearings are worn. Replace column shaft bearings.
2. Steering Wheel Serration (spline) of wheel or column shaft
is worn.
Replace wheel or column shaft.
3-4-4. Steering system is overheating
Check point Cause Check/Action
1. Oil Level of
Hydraulic Oil Tank
Oil level in hydraulic oil tank is low. Fill tank until correct oil level is obtained.
2. Oil Cooler Cooling efficiency is reduced due to clogged
oil cooler fins.
Clean oil cooler fins.
3. Steering Circuit
Pressure
If circuit pressure setting is excessively low,
relief valve is open, causing temperature of
hydraulic oil in circuit to rise.
Measure steering circuit pressure.
If low, replace relief valve.
•
•
If load is excessively heavy, relief valve is
open, causing temperature of hydraulic oil
in circuit to rise.
Measure steering circuit pressure.
If high, decrease steering load.
•
•
4. Suction Filter for
Steering • Charge
Pump
Load of steering • charge pump increases
due to clogged filter, causing temperature of
hydraulic oil in circuit to rise.
Clean suction filter or replace it if necessary.
3-4-5. Abnormal noise from steering system
Check point Cause Check/Action
1. Oil Level of
Hydraulic Oil Tank
Pump suction pressure is high because oil
level of hydraulic oil tank is low, causing
cavitation in steering circuit system.
Fill tank until correct oil level is obtained.
2. Steering Circuit Cavitation is caused by air in circuit. Bleed circuit.
3. Hydraulic Hose
Clamp
Vibrator sound of hydraulic hose is
generated because clamp securing
hydraulic hose is loose.
Tighten bolts of loose hydraulic hose clamp
to specified torque.
4. Suction Filter for
Steering • Charge
Pump
Cavitation is occurring in steering • charge
pump due to clogged filter.
Clean suction filter or replace it if necessary.