SERVICE MANUAL & ICA
WIPLINE 3730 & 3900 FLOATS
Page 48
Revision K
P/N 1002551
1. PROBLEM
– Powerpack does not run after gear selection.
Probable cause:
a. Circuit breaker out.
b. Pressure switch not pulling in at low cut-in.
c. Solenoid switch not pulling in.
d. Faulty pump motor or motor ground.
Verification and Remedy:
a. Reset Circuit Breaker
b. Short across pressure switch leads and see if motor runs.
c. Short across main solenoid leads and see if motor operates. If it operates—replace pressure switch.
d. If c above does not produce results, and it is verified that voltage was actually applied to the motor, it can be
assumed that the motor is bad.
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.
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.
9.0 TROUBLE SHOOTING
