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You are here: Home > Repair Parts > Vacuum Pump Parts > Robinair Vacuum Pump Repair Parts > 15150 15300 15500 15800 Robinair VacuMaster Vacuum Pump Replacement Parts
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15150 15300 15500 15800 Robinair VacuMaster Vacuum Pump Replacement Parts (Old Style)

Part No.Description
523192Handleand Switch Assembly (all models except 15800)
535491Handleand Switch Assembly (Model 15800)
523193OilDrain Fitting
523194Capacitor(all models except 15800)
535492Capacitor(Model 15800)
20019OilFill Plug
523197Base(all models except 15800)
535493Base(Model 15800)
523199HousingGasket (Models 15150, 15151, and 15155)
523201HousingGasket (Models 15300, 15301, 15355, 15500, 15501, 15505, 15203)
535494HousingGasket (Model 15800)
523203ExhaustFitting (all models except 15800)
535495ExhaustFitting (Model 15800)
525488InletFitting Adapter, 3/8" Male Flare x 1/2" Female ACME
525402InletFitting, 1/4" and 3/8" Male Flare
525488InletFitting Adapter, 3/8" Female Flare x 1/2" Male ACME

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Troubleshooting Guide
Your VacuMaster® pump has been designed for dependable use and long life. If something should go wrong, however, the following guide will help you get the pump back into service as quickly as possible.
If disassembly of the pump is required, check your warranty. The warranty may be voided by misuse or customer tampering that results in the pump being inoperable.
Failure To Start
  1. Check line voltage. Robinair VacuMaster® pumps are designed to start at +10% line voltage (loaded) at 41o F (5° C). At extremes, however, switching between the start and run windings may occur.
Oil Leakage
  1. Verify the oil is not a residual accumulation from spillage, etc
  2. If leakage exists, the module cover gasket or the shaft seal may need to be replaced. If leakage exists in the area of the oil drain plug, you may need to reseal the plug using a commercial pipe thread sealer.
Failure To Pull A Good Vacuum
  1. Confirm the vacuum gauge and all connections are in good condition and leak-free. You can confirm leakage by monitoring the vacuum with a thermistor gauge while applying vacuum pump oil at connections or suspected leak points. The vacuum will improve briefly while the oil is sealing the leak.
  2. Verify the pump oil is clean. A badly contaminated pump may require several oil flushes. See OIL CHANGE PROCEDURE. Note: Use only high vacuum pump oil such as Robinair’s Premium High Vacuum Pump Oil. Other oils will prevent pull-down to a deep vacuum.
  3. Verify the oil is at the correct level. For maximum pump operation, the oil must be even with the OIL LEVEL line on the sight glass when the pump is running. See OIL CHANGE PROCEDURE. Do not overfill — operating temperatures will cause the oil to expand, so it will appear at a higher level than when the pump is not running. To check the oil level, start the pump with the inlet capped. Check the oil level in the sight glass. Add oil if necessary.
When You Need HelpIf these procedures do not correct the problem, contact us at our toll-free service line for further information. Century Tool & Equipment is a Certified Robinair Service Center and a distributor.

1-866-277-0888

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