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Troubleshooting
Troubleshooting
NOTE: Check all possible problems and causes before disassembling the pump.
Relieve the pressure, page 14, before checking or servicing the equipment.
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 | Replace. See Bellows Displacement Pump |
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| manual.* |
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Pump output low on only one stroke. | Held open or worn ball check valves. | Check and repair. See Bellows Displace- |
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| ment Pump manual.* |
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| Worn piston | Replace. See Bellows Displacement Pump |
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| manual.* |
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No output. | Improperly installed ball check valves. | Check and repair. See Bellows Displace- |
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| ment Pump manual.* |
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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. See Bellows Displace- |
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| ment Pump manual.* |
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| Clogged suction tube or filter | Clear part(s). |
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| Worn piston | Replace. See Bellows Displacement Pump |
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| manual.* |
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| Damaged bellows. | Replace. See Bellows Displacement Pump |
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| manual.* |
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Material visible in the overflow chamber | Damaged bellows. | Replace. See Bellows Displacement Pump |
(if equipped) or weeping from port in |
| manual.* |
packing nut. |
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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 NXT Air Motor manual.* |
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| Runaway solenoid has tripped. | Retract solenoid. NXT Air Motor manual.* |
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*See Related Manuals, page 2, for manual numbers.
312795E | 17 |