S900-01-880 Issue C
Page 44 © Edwards Limited 2008. All rights reserved.
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Maintenance
Excessive booster pump
temperature
Filter clogged Clean or replace the filter.
Oil Overfilled Correct the oil level.
Excessive pressure differential Check the cut-in pressure setting and the
backing pump.
Poor vacuum Check the system for leaks and purge rates,
seal any leaks found.
Overheating bearings
or gears
Oil level incorrect Correct the oil level.
Contaminated oil Change the oil.
Coupling misalignment Realign the coupling.
Excessive belt tension Readjust the alignment and tension.
Knocking Impeller timing Check the timing and readjust as required.
Booster pump body distortion Relieve any pipe strain or body distortion.
Excessive operating pressure Remove the cause.
Excessive temperature Remove the cause.
Worn bearings Replace the bearings.
Worn gears Replace the gears.
Vibration Drive misalignment Readjust the alignment and tension.
Insufficient anchoring support Add support to eliminate vibration.
Impeller drag Adjust the timing and clearance.
Worn bearings Replace the bearings.
Worn gears Replace the gears.
Loss of oil Oil filler or drain plug leak Replace the plug 'O' rings.
Vacuum leak Check seal 'O' rings and vacuum joints.
Worn seal Replace the seal, static ring and 'O' rings.
Abnormal noise Impeller tip drag Check the timing and readjust as required.
Worn bearings Replace the bearings.
Gear backlash Replace the gears.
Improper belt tension Re-tension the belts.
Hubs rubbing Check that the hubs are not touching.
Motor misalignment Correct the motor alignment.
Seal squeal Improper oil level Lower the oil level.
Table 17 - Troubleshooting
Symptom Probable cause Recommended solution
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