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TM-9-6115-667-13P Power Unit Diesel Engine Driven 2 1/2 Ton Trailer Mounted 30 kw 50/60 Hz PU-803 Manual
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PROBLEM
TM9-6115-667-13&P TROUBLESHOOTING If symptoms of poor performance  develop,  the  following chart can be used as a guide to correct the problem. When   diagnosing   faults   in   operation   of   the   hydraulic motor generator, always check that the hydraulic power source is supplying the correct hydraulic flow and pressure  to  the  alternator  as  listed  in  the  table.    Use  a flowmeter known to be accurate.  Check the flow with the hydraulic oil temperature at least 80°F/270C. PROBLEM CAUSE REMEDY Hydraulic motor generator does Hydraulic power source not Check power source for proper not run. functioning. flow and pressure (7-9 gpm/26- 34 Ipm, 1000-2000 psi70-140 bar.) Couplers or hoses blocked. Locate and remove restriction. Hyrevz motor failure. Inspect and repair. Hydraulic lines not connected. Connect lines. No electrical output. Open circuit breaker. Reset circuit breaker. Faulty receptacle. Replace receptacle. Loose or broken wires. Locate and repair. Loss of residual magnetism. Flash the Field. 1.  Stop the generator. 2.  Remove the receptacle panel (2, figure 2). 3.  Using a 12 volt automotive battery, touch the positive lead to the end of the diode set with the white or silver band located on the rotor assembly.  At the same time touch the negative lead to the opposite end of the diode set.  Hold the leads across the diode set for 2-4 seconds. NOTE: Do not reverse the polarity of the leads.  This may cause damage to the diodes or the rotor or both. 3.  Replace the receptacle panel and start the generator. Short circuit in rotor field or rotor Return the unit to Authorized diodes. Service Dealer. Shorted AC or exciter stator Check with ohmmeter.  Continuity windings. should exist from black to white wires and also from red to red wires.  No continuity should exist from either black or whitewire to red wire or from any wire to ground.  If a short circuit is detected, replace the stator. 13

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