BUSCH R 5 - Page 25

Troubleshooting | 11
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Pump is seized Pump was operated without
oil; pump was operated for
an extended period of time
in the wrong direction.
• Contact Busch service.
Liquid carryover into the
cylinder broke vanes while
the pump was running
• Contact Busch service. In-
stall liquid separator on
the inlet of the vacuum
pump.
Pump was overfilled with oil
in oil reservoir.
• Contact Busch service.
Follow Oil and Oil Filter
Change [►17] procedure
and do not overfill.
A second vacuum pump or a
vacuum receiver is con-
nected to the inlet of the
pump.
• Contact Busch service. In-
stall a non-return valve on
the inlet of each vacuum
pump.
The Oil Filter (OF) does not
get warm within 2-5 min-
utes when cold pump is
started.
Oil filter is clogged • Change oil and oil filter
(see Oil and Oil Filter
Change [►17]).
Wrong oil filter is installed. • Use only Busch approved
oil filter.
Oil lines are clogged • Clean oil lines; flush oil
cooler (contact Busch ser-
vice).
Motor has failed • Service or replace motor
(contact Busch service).
The vacuum pump fumes or
expels oil droplets through
the gas discharge.
The exhaust filters (EF) are
partially clogged.
• Replace the exhaust filters
(EF).
An exhaust filter (EF) with o-
ring is not fitted properly.
• Ensure the correct posi-
tion of the exhaust filters
(EF) and the o-rings.
The float valve (FV) does
not work properly.
• Check the float valve and
oil piping for correct oper-
ation (contact Busch ser-
vice).
Oil return line is clogged. • Clean or replace clogged
line. Check that oil is be-
ing drawn out of the ex-
haust filter area while the
vacuum pump is operat-
ing.
The oil is black. Oil change intervals are too
long.
• Flush the vacuum pump
(contact Busch).
The inlet filter (optional) is
defective.
• Replace the inlet filter.
The vacuum pump runs too
hot.
• See problem "The vac-
uum pump runs too hot".