PUMP SYSTEM MALFUNCTION
MALFUNCTION | CAUSE | REMEDY |
The Pressure and/ | Worn packing seals | Replace packing seals |
or the Delivery | Broken valve spring | Replace spring |
Drops | Belt slippage | Tighten or Replace belt |
| Worn or Damaged nozzle | Replace nozzle |
| Fouled discharge valve | Clean valve assembly |
| Fouled inlet strainer | Clean strainer |
| Worn or Damaged hose | Repair/Replace hose |
| Worn or Plugged relief valve on pump | Clean, Reset, and Replace worn parts |
| Cavitation | Check suction lines on inlet of |
| pump for restrictions |
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| Unloader | Check for proper operation |
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Water in crankcase | High humidity | Reduce oil change interval |
| Worn seals | Replace seals |
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Noisy Operation | Worn bearings | Replace bearings, Refill crankcase |
| oil with | recommended lubricant |
| Cavitation | Check inlet lines for restrictions |
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| and/or proper sizing |
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Rough/Pulsating | Worn packing | Replace packing |
Operation with | Inlet restriction | Check system for stoppage, air |
Pressure Drop |
| leaks, correctly sized inlet |
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| plumbing to pump |
| Accumulator pressure | Recharge/Replace accumulator |
| Unloader | Check for proper operation |
| Cavitation | Check inlet lines for restrictions |
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| and/or proper size |
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Pressure Drop at Gun | Restricted discharge plumbing | |
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| flow rate of pump |
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Excessive | Worn plungers | Replace plungers |
Leakage | Worn packing/seals | Adjust or Replace packing seals |
| Excessive vacuum | Reduce suction vacuum |
| Cracked plungers | Replace plungers |
| Inlet pressure too high | Reduce inlet pressure |
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High Crankcase | Wrong Grade of oil | Giant oil is recommended |
Temperature | Improper amount of oil in crankcase | Adjust oil level to proper amount |
Preventative Maintenance
| Check | Daily | Weekly | 50hrs | Every | Every | Every | |
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| 500 hrs | 1500 hrs | 3000 hrs | |
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| Oil Level/Quality | X |
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| Oil Leaks | X |
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| Water Leaks | X |
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| Belts, Pulley |
| X |
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| Plumbing |
| X |
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| Recommended Spare | Parts |
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| Oil Change |
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| X | X |
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| Seal Spare Parts (1 kit/pump) |
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| X |
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| (See page 11 for kit list) |
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| Oil Seal Kit (1 kit/pump) |
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| X |
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| (See page 11 for kit lit) |
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| Valve Spare Parts (1 kit/pump) |
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| X |
| (See page 11 for kit list) |
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