Product Manual

Rev. O 10
Ensure valve is shifting
(use dipstick push on valve
spool to shift valve. Look
through cross drilled holes
between o-rings insuring valve
is shifting)
the spool will cover half of
the cross drilled holes when
valve is at its at rest or
activated positions)
Pump Not Priming
*Remove check valve &
activate motor momentarily to
prime.
Replace gear pump if
problem is not solved
**Remove check valve plug &
activate motor momentarily to
prime
Relief Valve
If relief valve is bypassing
check pressure gage to insure
valve is set at proper setting as
marked on power unit
Double check with
equipment manufacturer
insuring the manufacturer
did not adjust pressure
setting at factory.
Cylinder
**Check to see if fluid is
passing through the rod seals
to tank
Rebuild or replace the
cylinder if fluid is passing
through the cylinder without
moving the rod
* Check to see if fluid is coming
out vent on rod end of cylinder
when fully retracted
Symptoms
Possible Cause
Correction
Special Notes
(*Single Acting)
Cylinder Not Retracting
Dead or Low Battery
Load test battery
Charge or replace battery
Poor Ground
Ground battery directly to DC
motor
Use jumper cables to jump
ground only
Coil on Solenoid Valve not
Activating
Insure power is getting to coil,
check all electrical connections
and check for magnetism
Replace coil if you are
getting power to the coil but
it is not energizing.
Check ground wire or valve
stem. For loose connections or
corrosion. (If coil is single wire
lead, check the contacting point
where solenoid rests on valve
stem for corrosion)
Loose wire in quick connector
or control box
Clean contact in hand control
with eraser