HP12 User
Manual ◄ 13
TROUBLESHOOTING
Problem
Cause
Remedy
Engine will not start.
Flow Switch is not in the “FLOW OFF”
position.
Make sure the Flow Switch is in the
“FLOW OFF” position before attempting
to start the power unit.
Battery is not connected.
Check the battery cables for continuity
and re-attach to the battery.
Weak battery charge.
Test the battery voltage and charge if
necessary. If the battery will not hold a
charge, replace.
No Fuel.
Ensure the power unit is cool, then add
fuel.
Fuel filter is plugged.
Replace the fuel filter.
Defective spark plugs.
Remove the spark plugs and check the
gap. Replace if necessary.
Hydraulic fluid is blowing out
of the fluid reservoir vent.
Hydraulic fluid tank is overfilled.
Remove hydraulic fluid from the tank.
Hydraulic pump is leaking.
Check the pump connections (see page
20). Tighten if necessary.
The hydraulic tool connected
to the power unit will not
operate.
The Flow Selector Knob is not in the
proper position for the connected tool.
Ensure that the Flow Selector Knob is
positioned for the correct fluid flow for
your tool.
The tool is not properly connected to
the power unit.
Check the connection hoses from
the power unit to the tool. Ensure the
pressure and the return hoses are in the
proper ports on the tool.
The quick disconnect fittings are
defective.
Disconnect the fittings from the hose
and ensure there is free flow from each
end of the fittings.
The hydraulic fluid level in the reservoir
is too low.
Check the fluid level in the hydraulic
fluid tank. Add more fluid if necessary.
The pump coupling is defective.
Power down the unit and check the
coupling between the hydraulic pump
and the engine (4, page 18).
The relief valve is stuck open.
Adjust the valve or replace if necessary
(7, page 16).
Suction hoses are kinked.
Visually check the suction hose for a
kink. The hose should have a smooth
curve.
The solenoid is not working.
Check electrical connections (see page
21). Replace if necessary.
The attached tool is defective.
Refer to the tool manual.
