4.7 Checking Valve Cartridge and Solenoid
1. Place the liftgate on the ground in the open position.
2. Place a steel screwdriver over the top of the power
down valve solenoid.
593
3. Momentarily activate the control switch in the DOWN
position. The screwdriver should be attracted to the
magnetic field created by the solenoid.
4. Repeat the process to check the power up solenoid.
Momentarily activate the control switch in the UP
position.
5. If no magnetic pull is produced, the solenoid is defective
and should be replaced. If the solenoid is activated,
check the cartridge valve.
6. Remove the solenoid from the valve assembly.
Replacement part — A-176315.
7. Remove the valve cartridge from the pump body.
Replacement part — A-130216 (lowering valve) or
A-130215 (raising valve).
8. Clean the cartridge and blow it dry with compressed
air (not greater than 30 psi). Also, blow out the pump
body.
9. Use a small screwdriver and carefully press on the
spool inside the cartridge. If the spool moves freely,
the cartridge is good. If it does not move, replace
the cartridge, as the spool could be bent, pitted, or
damaged in some other way.
20a
4.8 Solenoid Valve Screen
29a
If the solenoid is working electrically, check the debris
screen and clean if dirty.
4.9 Replacing the Solenoid Valve
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4
3
2
1
28a
1. While installed in the pump, remove nut (1).
2. Remove coil (2) from cartridge (3).
3. Remove cartridge (3) from pump body.
4. O-ring (4) is not required on current models and can be
discarded.
