BUSCH R 5 series Installation And Operation Manual

is seizing.
Remedy:
Follow disassembly and assembly steps outlined in the
Maintenance and Repair Manual and remove foreign
parts, and replace vanes and bearings or contact the
nearest Busch Factory Service Center..
4.4 Trouble
Pump discharges smoke at the exhaust port
or expels oil droplets from the exhaust.
Possible Cause:
Exhaust filter is not properly seated with O-ring (Ref.
121) in filter base or filter material is cracked.
Remedy:
Check condition and check for proper seating of
exhaust filters. Replace if necessary. Also, check filter
spring clips for tightness.
Possible Cause:
Exhaust filter is clogged with foreign particles.
Remedy:
Replace exhaust filter.
Possible Cause:
The oil return valve (Ref. 275) is stuck open on RA/RB
pumps. Proper function is that when blowing into check
valve, it should close. When applying vacuum on it,
check valve should open.
Remedy:
Free or replace the oil return check valve.
Possible Cause:
If RA/RB Series vacuum pumps run continuously over
8 hours without ever being shut down, it may be possi-
ble that oil accumulates behind the exhaust box cover
to the extent that oil is blown out of the exhaust with the
exhaust gas.
Remedy:
Shut pump down during break periods or install an addi-
tional oil return line assembly. Check that oil return
valve (Ref. 275) is free and drains oil back into the
pump when the RA/RB Series pump is stopped.
Possible Cause:
Oil return line (Ref. 290) on RC Standard pump is
clogged or broken.
Remedy:
Free clogged line or replace. Check that oil is being
drawn out of the exhaust filter area while the vacuum
pump is operating.
Note: An oil filling plug with pressure gauge is provid-
ed on all R 5 Series pumps, so that the pressure in front
of the exhaust filters can be monitored. The green field
indicates that the filters are still effective. Back pres-
sure that causes a continuous reading in the red field
requires immediate change of exhaust filters (Ref. 120).
4.5 Trouble
Pump runs very noisily.
Possible Cause:
Coupling insert worn.
Remedy:
Replace coupling insert in motor/pump coupling.
Possible Cause:
Bearing noise.
Remedy:
Follow disassembly and assembly steps outlined in the
Maintenance and Repair Manual and replace bearings.
Possible Cause:
Vanes stuck.
Remedy:
Follow disassembly and assembly instructions outlined
in the Maintenance and Repair Manual and replace
vanes. Use only recommended Busch oil and change
oil more frequently.
4.6 Trouble
The pump runs very hot. See Technical Data
for typical oil sump temperature.
Note: The oil temperature with a closed inlet should be
approximately 185-225°F depending on pump type. At
24 in. Hg, the oil in the pump can go above 225°F.
12
WARNING: Do not apply pressure or vacu-
um by mouth.

BUSCH R 5 series Specifications

General

Brand	BUSCH
Model	R 5 series
Category	Water Pump
Language	English