Troubleshooting
Problem Symptom Possible Solutions
Hydraulic
Pump
No Oil
Flow
• CHECK OIL LEVEL IN RESERVOIR. If oil level is low, check for
leaks in system.
• CHECK BELT TENSION. Tighten if needed. Replace belt if
necessary.
• CHECK FOR SHEARED KEY ON PUMP SHAFT. Replace key.
• CLUTCH NOT FUNCTIONING. See clutch section.
• INTERNAL PUMP DAMAGE. Have pump repaired or replaced.
• CHECK PRESSURE LINE AT PUMP TO SEE IF OIL IS MOVING.
• CHECK TO SEE IF SUCTION HOSE COLLAPSES IN SUCTION
Hydraulic
Pump
No Oil
Pressure
• VALVE NOT FUNCTIONING. Check for disconnected wires at
solenoid.
• CHECK FOR POSSIBLE LEAKS IN SYSTEM. Repair blown
hoses.
• CHECK FOR MALFUNCTIONING SWITCH. Replace broken
switches.
• PRESSURE RELIEF IS BROKEN ALLOWING OIL TO BYPASS
SYSTEM. Replace pressure relief.
• PRESSURE SEAL ON PUMP IS BROKEN OR WORN. Replace.
• BELTS OR CLUTCH MAY BE SLIPPING. Tighten belts.
• PRESSURE RELIEF MAY BE SET TOO LOW.
CAUTION: PRESSURE EXCEEDING 2,600 PSI CAN DAMAGE
THE PUMP.
Clutch Does Not
Engage
• CHECK FOR BLOWN FUSE. Replace.
CAUTION: FUSE SHOULD NOT EXCEED 30 AMPS
• CHECK WIRE TO CLUTCH. Insure there are no breaks or shorts.
• CHECK FOR BAD SWITCHES IN SYSTEM. Replace.
• CHECK FOR BAD MAGNETIC COIL. Use jumper from positive
battery terminal to check coil. Replace coil if necessary.
Belt(s) Jumps Off
Pulley
• BELTS TOO LOOSE. Tighten belts.
• CHECK FOR EXCESSIVE BELT WEAR. Replace worn belts.
• CHECK FOR LOOSE PUMP BRACKET. Tighten loose bolts.
Replace broken bolts.
• CHECK ALIGNMENT OF CLUTCH AND CRANKSHAFT
PULLEYS. Re-align pulleys.
• CHECK CRANKSHAFT PULLEY FOR LOOSE OR BROKEN
BOLTS. Tighten loose bolts. Replace broken bolts.
• CHECK ALIGNMENT OF IDLER PULLEY AND THE CONDITION
OF IDLER PULLEY BEARINGS. Re-align idler pulley. Replace
worn or broken bearings.
• MAKE SURE THAT BELTS ARE NOT CRACKED OR WORN.
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