NPK M20C, Instruction Manual, Page: 128 / 152

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128
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TROUBLESHOOTING
DETERMINE THE TYPE OF PROBLEM
Performance problems are classified as “LOSS OF POWER” or “LOSS OF CYCLE
SPEED” (assuming the problem is not due to misapplication) .
1. LOSS OF POWER
NPK Material Processor jaw crushing/cutting forces are determined by the
operating pressure setting and NPK pressure intensifier performance.
2. LOSS OF CYCLE SPEED
NPK Material Processor cycle speed is determined by oil flow to the unit. The
hydraulic installation circuit for the Material Processor must be set to provide the
correct flow.
DETERMINE THE CAUSE OF THE PROBLEM
Technical problems are caused by either the NPK Material Processor or the carrier’s
hydraulic system
(hydraulic installation kit for the Material Processor)
. Checking the
hydraulic pressure and flow will determine if the problem is in the Material Processor or
the carrier. If the pressure and flow to the Processor are correct, the problem is in the
Material Processor.
LOSS OF POWER
Loss of power can be caused by a low carrier relief valve setting or by a low Material
Processor relief valve setting. Verify the correct relief valve settings of the carrier and
the Material Processor. (See “PROCESSOR SEQUENCE, RELIEF VALVE AND
CARRIER RELIEF VALVE SETTINGS” on page 134.)
If the relief valve pressures are to specification, proceed to the “INTENSIFIER
CHECKS” troubleshooting chart on page 135 and the “PRESSURE INTENSIFIER
OPERATION” section on page 137.