ULTRASOURCE ULTRAVAC 2100, Owner'S Manual

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4.4.5 Possible Cause
Oil return line (Ref. 290) on RC Standard pump
is clogged or broken.
Remedy:
Free clogged line, replace broken line, but only
with proper size, and check that oil is pumped out of
oil sump while vacuum pump is operating.
NOTE: An oil filling plug with pressure gauge is
provided on all R5 Series pumps, so that the pres-
sure in front of the exhaust filters can be monitored.
The green field indicates that the filters are still
effective. Any back pressure close to the red field
requires immediate change of the exhaust filter (Ref
120).
4.5 Trouble
Pump runs very noisly.
4.5.1 Possible Cause
Coupling insert worn.
Remedy:
Replace coupling insert in motor/pump cou-
pling.
4.5.2 Possible Cause
Bearing noise.
Remedy:
Follow disassembly and assembly steps outlined
in the Maintenance and Repair Manual and replace
bearings.
4.5.3 Possible Cause
Vanes stuck.
Remedy:
Follow disassembly/assembly instructions out-
lined in the Maintenance and Repair Manual and
replace vanes.
4.6 Trouble
The pump runs very hot. See Technical Data for
typical oil sump temperature.
4.6.1 Possible Cause
Not enough air ventilation to the pump.
Remedy:
Clean motor and pump air grills. Do not install
the pump in an enclosed cabinet unless a sufficient
amount of fresh air is supplied to the pump. On
pumps with oil cooling coils, clean outside fin
assembly. Bring ambient air temperature down.
4.6.2 Possible Cause
Automotive-type oil filter clogged and pump
does not receive enough oil.
Remedy:
Change automotive oil filter.
4.6.3 Possible Cause
Not enough oil in oil reservoir or badly burned
oil is used for pump lubrication.
Remedy:
Drain and refill only with non-detergent oil,
increase oil change intervals.
NOTE:
On some high temperature applications,
it may be necessary to change to a high temperature
oil such as R590 or R570. Contact the factory for
recommendations.
4.7 Trouble
Pump is seized.
4.7.1 Possible Cause
Pump operated without oil and vanes broke.
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