Sakai SW300-1, Shop Manual

Page: 241 / 246

10-058
TROUBLESHOOTING
3-3. Vibrator System
If a problem occurs in the vibrator systems such as the vibrator pump, vibrator motor and vibrator solenoid valve,
determine the cause and carry out action as required, according to the following general troubleshooting items.
(NOTICE)
• When checking whether or not the pressure is correct, refer to the pressure standard value for each
hydraulic circuit.
3-3-1. No vibration
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
Vibrator pump fl ow is reduced due to
clogged fi ller.
Clean suction fi lter or replace it if necessary.
3. Vibrator Solenoid
Valve
Circuit does not obtain required pressure
because vibrator solenoid does not shift. Repair vibrator solenoid valve or replace it if
necessary.
4. Vibrator Motor Internal leakage of vibrator motor. • Measure drain quantity from vibrator motor.
• If drain quantity is larger than standard
value, repair vibrator motor or replace it if
necessary.
Output torque is not transmitted due to worn
spline of vibrator motor output shaft. Replace vibrator motor.
5. Vibrator Pump Insuf fi cient discharge rate from vibrator
pump due to reduced ef fi ciency of vibrator
pump.
• Measure discharge fl ow rate of vibrator
pump with fl ow meter.
• If discharge fl ow rate is not within speci fi ed
range, repair vibrator pump or replace it if
necessary.
Insuf fi cient pump discharge due to wear of
vibrator pump drive shaft spline.
Replace vibrator pump.
Vibrator circuit pressure is not held in
vibrator pump case. If pressure in vibrator pump case is not
within allowable range, repair vibrator pump
or replace it if necessary.
10̲TROUBLESHOOTING̲oku.indd 10-058 10̲TROUBLESHOOTING̲oku.indd 10-058 2012/11/14 20:25:58 2012/11/14 20:25:58