BUSCH R 5 - Page 24

11 | Troubleshooting
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The vacuum pump does not
reach the usual pressure on
the suction connection.
Oil is contaminated.
• Change oil (see Oil and
Oil Filter Change [►17]).
Leakage in suction line. • Check the piping for
leaks.
The inlet screen (IS) is par-
tially clogged.
• Clean the inlet screen (IS).
Oil level too low. • Top up oil.
The oil filter (OF) is dirty or
clogged.
• Change the oil and re-
place the oil filter (see Oil
and Oil Filter Change
[►17]).
The anti-suck back valve is
stuck in the closed or par-
tially open position due to
contamination.
• Disassemble anti-suck
back valve and screen.
Clean as required.
The oil tubing is plugged or
leaking.
• Replace or clean tubing.
Check and retighten oil
tubing fittings (contact
Busch service).
The shaft seal is leaking. • Contact Busch service.
Vanes are blocked in the ro-
tor or they are damaged.
• Contact Busch service.
The radial clearance be-
tween the rotor and the
cylinder is no longer correct.
• Contact Busch service.
The exhaust valve is not
properly seated or it is par-
tially stuck open (RA models
only).
• Contact Busch service.
The inlet filter cartridge (op-
tional) is partially clogged.
• Replace the inlet filter car-
tridge.
Internal parts are worn or
damaged.
• Contact Busch service.
The vacuum pump runs very
noisily.
Worn coupling (CPL). • Replace the coupling
(CPL).
Stuck vanes. • Contact Busch service.
Defective bearings. • Contact Busch service.
The vacuum pump runs too
hot.
Insufficient cooling. • Remove dust and dirt
from the exterior of the
vacuum pump .
• Check the cooling fan.
Ambient temperature too
high.
• Observe the permitted
ambient temperature.
Oil filter (OF) is clogged. • Change the oil and oil fil-
ter (see Oil and Oil Filter
Change [►17]).
Oil change intervals are too
long.
• Flush the vacuum pump
(contact Busch service).
Oil level too low. • Top up oil.
The exhaust filters (EF) are
partially clogged.
• Replace the exhaust filters
(EF).