Sakai CR271, Shop Manual

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10-024
TROUBLESHOOTING
3-2-4. Machine does not stop completely with F-R lever in “N”
Check point Cause Check/Action
1. F-R lever Linkage F-R lever linkage is faulty. Check and adjust F-R lever linkage or
replace it if necessary.
2. Swash Plate Faulty pump swash plate setting. Repair propulsion pump or replace it if
necessary.
3-2-5. Propulsion 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. Propulsion Circuit
Pressure
If circuit pressure setting is excessively low,
relief valve opens, causing temperature of
hydraulic oil in circuit to rise.
• Measure propulsion circuit pressure.
• If low, inspect relief valve or replace it if
necessary.
If load is excessively heavy, relief valve
opens, causing temperature of hydraulic oil
in circuit to rise.
• Measure propulsion circuit pressure.
• If high, decrease propulsion load.
3. Suction Filter for
Charge Pump
Load of charge pump increases due to
clogged filter, causing temperature of
hydraulic oil in circuit to rise.
Clean suction filter or replace it if necessary.
3-2-6. Abnormal noise from propulsion system
Check point Cause Check/Action
1. Axle Bearings Axle bearings supporting front and rear
drums are damaged.
Replace axle bearings.
2. 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.
3. Suction Filter for
Charge Pump
Cavitation is occurring in charge pump due
to clogged filter.
Clean suction filter or replace it if necessary.
4. Parking Brake
Lever
Brake cannot be released completely, which
causes brake drag.
• Inspect brake cable, pads or disk or
replace them if necessary.
5. Propulsion Motor Internal bearing of propulsion motor is
damaged.
Repair propulsion motor or replace it if
necessary.