Troubleshooting
Relieve the pressure, and check all probable causes before disassembling the pump.
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury whenever you are instructed to relieve pressure, follow the Pres- sure Relief Procedure on page 10.
| SYMPTOM |
| PROBABLE CAUSE | TEST PROCEDURE |
| REMEDY |
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1. | Pump will not | Air is getting into the intake |
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| prime | housing: |
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| a. Defective | a. | Replace | ||
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| take manifold or accumu- |
| See page 15. | |
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| lator |
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| b. | Suction hose/tube | not | b. | Tighten, or add |
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| sealed |
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| sealant to threads |
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2. | Pump will not | a. | Air supply turned off |
| a. | Turn air supply on |
| run | b. | Fluid valve turned off |
| b. | Turn fluid supply |
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| valve on |
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| c. | Air pressure regulator | c. Minimum air pressure | c. | Increase air pressure |
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| set too low | on regulator 25 psi (175 |
| regulator adjustment |
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| kPa, 1.95 bar), depend- |
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| ing on fluid being |
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| pumped |
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| d | Pilot valve assemblies | d. Remove tube ends from | d. | Repair or replace pilot |
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| worn | hose studs. With air |
| valve assembly. See |
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| supply on, alternately |
| page 22. |
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| plug tube ends. If pump |
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| runs, remove pilot |
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| valves, inspect |
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| e. | Air control valve | e. Check for air coming | e. | Repair or replace air |
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| defective | from exhaust when |
| control valve. See page |
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| pump is not running |
| 20. |
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| f. | Air piston quad ring (28) | f. | Replace quad ring. See | |
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| worn |
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| page 18. |
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