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Problems with a rotary oil filled vacuum pump

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LAN_403

Physikfan

Mon Apr 10 2017, 09:11AM

Registered Member #60240 Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304

The pump is a two-stage oil filled rotary vacuum pump Vacuubrand RZ2:

IMG 2952400x275

At first the pump did not turn at all, although enough vacuum oil was inside the pump according to the sight glass for the oil level.

I put the motor axle free, and I tried to turn the pump mechanically back and forth.
Then the pump with motor drive went normally about 10 minutes, then apparently the rotary resistance became stronger and stronger and finally the engine stopped spinning.
A recommendation from the friendly manufacturer of this morning:
Disassemble and remove possible obstacles for easy turning.

Here are repair instructions:

And operating instructions:

johnf

Mon Apr 10 2017, 08:05PM

Registered Member #230 Joined: Tue Feb 21 2006, 08:01PM
Location: Gracefield lower Hutt
Posts: 284

Check your motor start and run capacitors

Physikfan

Mon Apr 10 2017, 08:44PM

Registered Member #60240 Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304

I will do this but the necessary torque to turn for a small angle the axel of the pump mechanically with a tool is now extremely large.

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