9-047
HYDRAULIC SYSTEM 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 the column shaft or orbitrol.
Column shaft bearing is worn.
Replace the column shaft bearings.
2. Steering Wheel
Serration (spline) of wheel or column
shaft is worn.
Replace the 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 the tank until the correct oil level is
obtained.
2. Oil Cooler
Cooling efficiency is reduced due to
clogged oil cooler fins.
Clean the oil cooler fin.
3. Steering Circuit Setting
Pressure
If the circuit pressure setting is
excessively low, the relief valve is open,
causing the temperature of hydraulic oil
in circuit to rise.
Measure the steering circuit pressure. If
low, increase the relief setting pressure.
If the load is excessively heavy, the relief
valve is open, causing the temperature
of hydraulic oil in circuit to rise.
Measure the steering circuit pressure. If
high, decrease the steering load.
4. Suction Filter for
Steering Pump
The load of steering pump increases
due to clogged filter, causing the
temperature of hydraulic oil in circuit to
rise.
Clean or replace the suction filter.
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 the steering system
circuit.
Fill the tank until the correct oil level is
obtained.
2. Air in the Steering
Hydraulic Circuit
Cavitation is caused by air in the circuit. Bleed the circuit.
3. Hydraulic Hose Clamp
Vibrator sound of hydraulic hose is
generated because the clamp securing
the hydraulic hose is loose.
Tighten bolts of the loose hydraulic hose
clamp to the specified torque.
4. Suction Filter for
Steering Pump
Cavitation results at the steering pump
due to clogged filter.
Clean or replace the suction filter.
Содержание SV400D-2
Страница 1: ...SV400 2 SHOP MANUAL 0404 99027 0 31649 B ...
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Страница 19: ...SPECIFICATIONS ...
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Страница 37: ...ENGINE AND CONTROLS ...
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Страница 47: ...HYDRAULIC SYSTEMS ...
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Страница 91: ...ELECTRICAL SYSTEM ...
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Страница 147: ...INSPECTION AND ADJUSTMENT ...
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Страница 167: ...TROUBLESHOOTING ...
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