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Troubleshooting
48
GA03108_002_C1 - 04/2018 - © Leybold
Malfunction
Likely cause
Remedy
Repair
Pump is too loud.
Motor stator defective.
Motor rotor defective.
Distances between housing and rotors is too
small due to
- contamination
- distortion of the pump
Bearing or gear damage.
Pistons make contact with the housing.
Rotor is running untrue.
Oil slinger disc makes contact with the gear
housing or the oil pipe.
Oil pump is blocked or defective.
Leybold Service.
Leybold Service.
Clean pumping chamber.
Affix and connect the pump free of tensions.
Leybold Service, shutdown pump immedia-
tely.
Leybold Service, shutdown pump immedia-
tely.
Leybold Service, shutdown pump immedia-
tely.
Leybold Service.
Leybold Service, shutdown pump immedia-
tely.
-
-
5.4
3.1/3.5
-
-
-
-
-
Pump is losing
lubricant.
Lubricant leak is apparent:
Oil drain plug is leaky.
Oil level glasses leaky.
Gear cover is leaky.
Puddle under the motor, leak in the seal.
No lubricant leak is apparent:
See malfunction „Lubricant in the pump
chamber“.
Drain lubricant, firmly screw in a new oil
drain plug with the gasket, fill in correct
lubricant quantity
Leybold Service.
Replace the O-ring of the gear cover.
Leybold Service, shutdown pump immedia-
tely.
See malfunction „Lubricant in the pump
chamber“.
5.2
-
-
-
-
Oil gets too dark.
Oil has been used up.
Pump gets too hot.
Exchange the oil.
See malfunction „Pump gets too hot“; after
remedy of the malfunction, exchange the oil.
5.2
-
Lubricant in the
pump chamber.
Lubricant level is too high.
Lubricant is ejected from the system.
Pump is not standing horizontally.
Pump has a gas leak towards the outside.
Pump has an internal leak.
Piston rings are defective.
Drain the lubricant down to the correct level.
Check system.
Place the pump correctly.
Check to see that the oil fill and oil drain
plugs are correctly seated, if required
replace gaskets. Replace the O-ring of the
gear cover.
Leybold Service.
Leybold Service.
5.2
-
3.1
5.2
-
-
Pump does not
attain its pumping
speed.
Intake screen is clogged.
Motor incorrectly connected.
Vacuum pump system has a gas leak.
Valve of the pressure balance line does not
close (WSU only).
Clean intake screen.
Connect motor correctly.
Detect leak and seal it.
Clean the valve or have it repaired.
5.3
3.4
-
5.6