WIPLINE MODEL 8000 SERVICE MANUAL
Page 42 of 62
1002554 • Rev H
DESCRIPTION AND OPERATION
1. PROBLEM – Powerpack does not run after gear selection.
PROBABLE CAUSE
a. Circuit breaker has failed
b. Pressure switch not pulling in at low cut in.
c. Solenoid switch not pulling in.
d. Faulty pump motor.
e. Motor not properly grounded.
VERIFICATION AND REMEDY
a. Reset circuit breaker.
b. Short across pressure switch leads and see if motor runs. If motor operates,
replace pressure switch.
c. Short across solenoid pressure switch leads and see if motor runs. If motor
operates, replace solenoid pressure switch.
d. If c. above does not produce results and it is verified that voltage was actually
applied to motor, it can be assumed motor is bad or not properly grounded.
e. Check motor ground.
2. PROBLEM – Powerpack does not shut off after gear reaches position.
PROBABLE CAUSE
a. Faulty pressure switch.
b. Faulty or dirty pressure relief valve allowing insufficient pressure buildup.
REMEDY
a. Replace pressure switch.
b. Clean and check relief valve.
3. PROBLEM – Powerpack shuts off before gear reaches position.
PROBABLE CAUSE
a. Binding or jammed gear retractor, which causes pressure to build up (and stay
up), and pressure switch shuts off powerpack.
b. Faulty or dirty pressure relief valve allowing insufficient pressure buildup.
REMEDY
a. Repair retractor.
4. PROBLEM – Powerpack cycles on and off after gear is in position.
PROBABLE CAUSE
a. Internal hydraulic leak.
b. External hydraulic leak.
Содержание WIPLINE 8000
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