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SERVICE MANUAL & ICA
WIPLINE 4000 FLOATS ON CESSNA A185E, A185F, AND 206 SERIES
Page 36
Revision G
P/N 1002552
5.5 TROUBLE SHOOTING
1. PROBLEM
- Power pack 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.
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.