ULTRASOURCE Ultravac 500, Owner'S Manual

Page: 78 / 84

Remedy:
Disassemble and exchange vanes as outlined in
the Maintenance and Repair Manual.
4.7.2 Possible Cause
Pump was operated for an extended period of
time in the wrong rotation.
Remedy:
Inspect vanes and replace.
4.7.3 Possible Cause
Liquid carryover into the pump cylinder broke
vanes while pump was running, or oil broke vanes
on start-up.
Remedy:
(a) Install condensate trap on the inlet of the
pump.
(b) Pump was overfilled with oil in oil reservoir.
Follow oil filling procedure (see Section 1.5) and do
not overfill.
(c) Built-in anti-suck-back valve (Ref. 250
through 255) leaking while pump was shut down
and vacuum was left in manifold. Clean valve seat
and check that anti-suck-back valve holds vacuum
on inlet when pump is shut down.
(d) Two pumps or a receiver is on the same main
line. Install a manual or automatic operated valve in
front of each pump.
4.8 Trouble
Automotive-type oil filter (Ref. 100) does not
get warm within two to five minutes when cold
pump is started.
4.8.1 Possible Cause
Automotive-type oil filter is clogged.
Remedy:
Replace automotive-type filter per Section 3.2
and exchange oil per Section 1.5.
4.8.2 Possible Cause
Wrong automotive-type filter is used and/or oil
lines leading to pump are clogged.
Remedy:
Use only automotive filter as listed in Section
3.2 and blow lines free.
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