Troubleshooting
Troubleshooting
Relieve the pressure before checking or servicing the equipment.
NOTE: Check all possible problems and causes before disassembling the pump.
Problem | Cause | Solution |
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Pump output low on both strokes. | Restricted air supply lines. | Clear any obstructions; be sure all shutoff |
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| valves are open; increase pressure, but do |
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| not exceed maximum working pressure. |
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| Exhausted fluid supply. | Refill and reprime pump. |
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| Clogged fluid outlet line, valves, etc. | Clear. |
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| Worn piston packing. | Replace. See displacement pump manual |
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| 312792. |
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Pump output low on only one stroke. | Held open or worn ball check valves. | Check and repair. |
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| Worn piston packings. | Replace. |
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No output. | Improperly installed ball check valves. | Check and repair. |
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Pump operates erratically. | Exhausted fluid supply. | Refill and reprime pump. |
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| Held open or worn ball check valves. | Check and repair. |
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| Worn piston packing. | Replace. |
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Pump will not operate. | Restricted air supply lines. | Clear any obstructions; be sure all shut off |
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| valves are open; increase pressure, but do |
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| not exceed maximum working pressure. |
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| Exhausted fluid supply. | Refill and reprime pump. |
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| Clogged fluid outlet line, valves, etc. | Clear. |
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| Damaged air motor. | See air motor manual 312796. |
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| Fluid dried on piston rod. | Disassemble and clean pump. See page 15 |
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| and manual 312792. In future, stop pump at |
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| bottom of stroke. |
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| Runaway solenoid has tripped. | Retract solenoid. See air motor manual |
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| 312796. |
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14 | 312794E |
