US VACUUM Torrvac Series, Installation & Operation Manual

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Possible cause : The pump or motor is blocked.
Remedy : Remove the fan cover and try to turn the
pump and motor over by hand. If frozen, remove
the motor from the pump and check the motor and
pump separately. If the pump is frozen, contact
U.S. Vacuum for instructions.
TROUBLE
The pump starts, but labors and draws a very
high current.
Possible cause : The oil is too heavy (viscosity too
high) or the ambient temperature is below 41 Deg
F.
Remedy : Warm up the oil before filling.
Possible cause : Pump is running in the wrong
direction.
Remedy : Check for correct rotation which is coun-
terclockwise when looking at the motor from the
motor fan side. Reverse any two leads on the
motor to change the direction of rotation
Possible cause : The pump is overfilled with oil or
the wrong kind of oil is used.
Remedy : Correct the oil level and quality. Use rec-
ommended oil.
Possible cause : Exhaust filters in exhaust cham-
ber are clogged and appear burned with pump oil.
Remedy : Replace exhaust filters, maintain proper
oil condition, oil level and use only U.S. Vacuum oil
& filters.
Possible cause : Foreign particles in pump, vanes
broken, bearings seized.
Remedy: Contact U.S. Vacuum for instructions.
TROUBLE
Pump smokes at the exhaust side or expels oil
droplets from the exhaust
Possible cause : Oil suckback line needle valve
closed
Remedy : Open needle valve on suckback line
to remove accumulated oil from upper housing of
exhaust box
Possible cause : The exhaust filter is not
properly seated with the o-ring (ref#221) in filter
base or filter material is cracked.
Remedy: Exhaust filter not properly seated with
o-ring, replace if necessary. Check filter spring
for tightness.
Possible cause : The exhaust filter is clogged
with foreign particles.
Remedy : Replace the exhaust filter.
TROUBLE
Pump runs very noisily.
Possible cause : Coupling insert worn.
Remedy : Replace coupling insert in motor/pump
coupling..
Possible cause : Bearing noise.
Remedy : Contact U.S. Vacuum for instructions.
Possible cause : Vanes stuck.
Remedy : Contact U.S. Vacuum for instructions.
Use only recommended U.S. Vacuum oil and
change more frequently.
TROUBLE
Pump runs hot
Note: The oil temperature with closed inlet
should be approximately 185-225 Deg F depend-
ing on pump type. At 24”Hg the oil in the pump
can go above 225 Deg F. These values are taken
at an ambient temperature of 68 Deg F. The
maximum recommended ambient operating tem-
perature for TorrVac pumps is 100Deg F.on a
Continuous basis.
Possible cause : Not enough air ventilation to the
pump.