Sakai SW800-II, Руководство по ремонту

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10-078
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
Flow rate of vibrator pump decreases due to
clogged filter.
Clean suction filter or replace it if necessary.
3. Vibrator Circuit
Pressure
Necessary circuit pressure cannot be
obtained because setting pressure of main
relief valve or port relief valve is too low.
Measure vibrator circuit pressure. If low,
check and adjust main relief valve or port
relief valve or replace them if necessary.
4. Vibrator Solenoid
Valve
(for Bypassing)
Vibrator circuit pressure is bypassed
because sequence valve is stuck.
Measure vibrator circuit pressure. If normal,
clean or replace vibrator solenoid valve.
Vibrator pressure is bypassed because
vibrator solenoid valve spool does not
switch.
If vibrator solenoid valve spool does not
switch, repair vibrator solenoid valve or
replace it if necessary.
5. 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.
6. 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.
3-3-2. Vibrator frequency does not change
Check point Cause Check/Action
1. Vibration
Frequency
Solenoid Valve
Vibrator pump swash plate does not move
because vibration frequency solenoid valve
spool is stuck.
Check and clean spool of vibration
frequency solenoid valve or replace it if
necessary.
2. Vibrator Pump Faulty vibrator pump servo cylinder. Replace vibrator pump.
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