Product Manual

Rev. O 12
Clean contact in hand control
with eraser
Debris in screen of load
holding valve (motor would be
running and bypassing over
relief valve)
Remove load holding valve.
Inspect screen & valve for
debris. (DO NOT REMOVE
VALVE FOR INSPECTION IF
SYSTEM IS UNDER
PRESSURE)
Use dipstick on power unit
to manually shift the valve.
This is accomplished by
inserting the dipstick in the
nose of the valve and
applying pressure. Replace
valve if it doesn't shift.
Debris in flow control valve if
present
Remove flow control valve &
inspect valve for debris.
Top of valve is threaded,
use 1/4-20 bolt to remove
flow control valve.
Directional Valve Issue
Check for bent valve stem
Replace valve if stem is
bent
Ensure coil is energizing
Double check you are
getting power to coil before
replacing
Remove valve and inspect
o-rings
Replace o-rings if damaged
Check cross drilled holes
between o-rings of valve for
debris
Replace valve if spool is not
shifting
(for most directional valves
the spool will cover half of
the cross drilled holes when
valve is at its at rest or
activated positions)
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)
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 there is
hydraulic pressure in the lines
If there is no pressure in
lines and cylinder will not
retract replace or repair
cylinder
Symptoms
Possible Cause
Correction
Special Notes
Reservoir Overflows
When Lowering
Low fluid level
Add fluid to reservoir when
cylinder is fully retracted
Before running power unit
insure all air bubbles have
dissipated to prevent further
aeration of fluid
Loose Inlet
Remove reservoir & tighten or
replace inlet tube on pump
Reservoir too small for
hydraulic system
Consult equipment
manufacturer for correct
reservoir size
Symptoms
Possible Cause
Correction
Special Notes