Sakai SW354, Shop Manual

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10-079
TROUBLESHOOTING
3-3-2. Vibrator frequency is too low
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. Suction Filter for
Vibrator Pump
Flow rate of vibrator pump decreases as
well as charge pressure decreases due to
clogged filter.
Clean suction filter or replace it if necessary.
3. Vibrator Motor Vibrator motor inlet pressure is low. Measure vibrator motor inlet pressure.
If low, check and adjust high pressure
relief valve or replace it if necessary.
•
•
Vibrator circuit pressure is not held in
vibrator motor case.
Measure vibrator motor case pressure.
If case pressure is not within allowable
pressure, repair vibrator motor or replace it
if necessary.
•
•
Decrease in vibrator motor rpm due to
internal leakage in vibrator motor.
Measure drain quantity from vibrator motor.
If drain quantity is larger than standard
value, repair vibrator motor or replace it if
necessary.
•
•
4. Vibrator Pump Insufficient discharge rate from vibrator
pump due to reduced efficiency of vibrator
pump.
Measure discharge flow rate of vibrator
pump with flow meter.
If discharge flow rate is not within specified
range, repair vibrator pump or replace it if
necessary.
•
•
Insufficient pump discharge due to wear of
vibrator pump drive shaft spline.
Replace vibrator pump.
3-3-3. Vibratory drum does not changeover vibrating (SW354 ROPS)
Check point Cause Check/Action
1. Vibrator Solenoid
Valve
Vibratory drum does not changeover
vibrating because spool of vibrator solenoid
valve does not change.
Repair vibrator solenoid valve or replace it if
necessary.
3-3-4. Vibration mode does not switch (TW504)
Check point Cause Check/Action
1. Vibrator Solenoid
Valve
Vibrator solenoid valve spool does not
change.
Repair vibrator solenoid valve or replace it if
necessary.
3-3-5. Vibrator does not stop
Check point Cause Check/Action
1. Vibrator Solenoid
Valve (SW/TW354)
Vibrator solenoid valve spool does not
change.
Repair vibrator solenoid valve or replace it if
necessary.
2. Vibrator Solenoid
Valve (TW504)
Vibrator solenoid valve spool does not
return to neutral position.
Repair vibrator solenoid valve or replace it if
necessary.