Poweramp POWERSTOP 4.2009 - Manual (Page 15)

Troubleshooting
13 4111-0014 — November 2006
Sept.2007
Problem
Hydraulic Troubleshooting
Possible Solution(s)
Restraint will not raise. 1. Remove excess load from restraint. Unit is
designed to raise no more than its own weight as a
safety feature.
2. Strainer element plugged. Remove reservoir and
clean or replace strainer element.
3. Hydraulic valve may be not be actuating. Locate
solenoid coil. Check solenoid valve coil to confirm it
is energized when raising restraint. Check solenoid
valve to confirm it is closed at rest and opens when
coil activated.
Restraint moves very slowly. 1. Low hydraulic fluid. Add hydraulic fluid as needed.
2. Pump by-pass set too low. Pump by-pass
adjustment is internal to pump. consult factory.
3. Debris in horizontal or vertical track. Clean tracks
and re-test.
4. Scissors pins binding. Check for rust, lubricate as
needed. Check for bent weldment. Repair or replace
as needed.
Restraint moves in one direction only regardless of
button pushed. 1. Four way valve stuck in either position. Locate
solenoid coil. Check coil for cracks or bulging.
Remove coil from solenoid valve and valve from valve
block. Check solenoid valve for contaminant's and/or
damage, including o-rings. Replace solenoid valve if
damaged.
DO NOT over tighten valve in valve block or coil on
valve when reinstalling. Valve torque is 15 foot lbs
and coil nut is 15 inch lbs.
Replace spool valve if problem persists and all other
troubleshooting procedures have been performed.