KENT Nordco KF3BM, Owner'S Manual

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Section C – Page #2 NOV/2005
TROUBLE SHOOTING GUIDE
If a problem occurs with the hammer, it is important to first get a flow and pressure
reading of the hammer circuit. To do this, plumb a flow meter and pressure gauge into the
pressure line going to the hammer, locate them as close to the hammer as possible. Once
the readings are taken, refer to the following list of problems and possible causes:
Condition Problem Remedy
Does not hammer... Supply hoses have been
reversed. Pressure line from pump must be
connected to pressure port
marked "P".
The return line connects to tank
port marked "T".
Oil flow is not sufficient to
cycle hammer. Flow test pump circuit. Replace
or repair pump, Adjust hammer
valve.
Operating pressure not
sufficient to cycle hammer. Check and/or adjust relief
settings. Adjust hammer valve.
Supply hoses collapsed,
plugged, or leaking. Replace hose.
Backhead chamber filled with
oil. Replace all hammer seals.
Shuttle valve stuck. Disassemble and clean all valve
ports. Replace worn valve.
Screw couplings are faulty Check fillings and replace as
needed.
Continued...