ULTRASOURCE ULTRAVAC 2100, Owner'S Manual

Page: 97 / 123

Remedy:
Correct the oil level and quality per Section 1.5
and use recommended motor oil.
4.3.4 Possible Cause
Exhaust filters in exhaust chamber are clogged
and appear burned black with pump oil.
Remedy:
Replace exhaust filters, maintain proper oil con-
dition, oil level, and use only Busch recommended
vacuum oil.
4.3.5 Possible Cause
The exhaust filter is clogged due to process
material.
Remedy:
Contact the factory for recommendation or prop-
er filter cartridge.
4.3.6 Possible Cause
Loose connection in motor terminal box; not all
motor coils are properly connected. Motor operates
on two phases only.
Remedy:
Check motor wiring diagram for proper hookup,
especially on motors with six internal motor wind-
ings, tighten and/or replace loose connections.
4.3.7 Possible Cause
Foreign particle in pump, vanes broken, bearing
seizing.
Remedy:
Follow disassembly and assembly steps outlined
in the Maintenance and Repair Manual and remove
foreign parts, and replace vanes and bearings.
4.4 Trouble
Pump smokes at the exhaust side or expels oil
droplets from the exhaust.
4.4.1 Possible Cause
Exhaust filter is not properly seated with O-ring
(Ref. 121) in filter base or filter material is cracked.
Remedy:
Check condition and placement of exhaust fil-
ters in filter base. Replace if necessary.
4.4.2 Possible Cause
Exhaust filter is clogged with foreign particles.
Remedy:
Replace exhaust filter. Install other factory rec-
ommended filter cartridges if pump application
requires other filter cartridges.
4.4.3 Possible Cause
The oil return valve (Ref. 275) is not properly
working, clogged. Proper function is that when
blowing into check valve, it should close. When
applying vacuum on it, check valve should open.
Remedy:
Free or replace the oil return check valve.
4.4.4 Possible Cause
If RA Series vacuum pumps run continuously
over 8 hours without ever being shut down, it may
be possible that oil accumulates behind the exhaust
box cover (Ref. 275) to the extent that oil is blown
out of the exhaust with the exhaust gas.
Remedy:
Shut pump down during break periods or install
an additional oil return line assembly. Check that oil
return valve (Ref. 275) is free and drains oil back
into pump when RA Series pump is stopped.
WARNING: Do not apply pressure or vacu-
um by mouth.
17