windings, tighten and/or replace loose connections.
Possible Cause:
Foreign particle in pump, vanes
broken, bearings seized.
Remedy:
Contact the nearest Busch Factory Service
Center for instructions.
4.4
Trouble
Pump smokes at the exhaust side or expels
oil droplets from the exhaust.
Possible Cause:
Inlet to pump is in a wide open con-
dition.
Remedy:
Do not operate pump at high inlet pressures
for more than a few minutes (pressures = 0.00-10.0" Hg
vac.)
Possible Cause:
The exhaust filter is not properly
seated with the O-ring (Ref. 121) in filter base or the fil-
ter material is cracked.
Remedy:
Check the condition and check for proper
seating of the exhaust filters. Replace if necessary.
Also, check the filter spring clips for tightness.
Possible Cause:
The exhaust filter is clogged with
foreign particles.
Remedy:
Replace the exhaust filter.
Possible Cause:
The oil return float valve (Ref. 194)
is not working properly.
Remedy:
Make sure the float valve and oil return line
are not plugged. Replace components if necessary.
4.5
Trouble
Pump runs very noisily.
Possible Cause:
Coupling insert is worn.
Remedy:
Replace the coupling insert in motor/pump
coupling.
Possible Cause:
Bearing noise.
Remedy:
Contact the nearest Busch Factory Service
Center for instructions.
Possible Cause:
Vanes stuck.
Remedy:
Contact the nearest Busch Factory Service
Center for instructions. Use only the 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.
These values are taken at an ambient temperature of
68°F. The maximum recommended ambient operating
temperature for an R 5 is 100°F on a continuous basis.
When it is necessary to operate a pump in ambient tem-
peratures above this limit, careful oil monitoring and/or
optional water cooling is necessary. Contact the facto-
ry at Virginia Beach for details.
Possible Cause:
Not enough air ventilation to the
pump.
Remedy:
Clean the motor and pump air grills. Clean
the radiator. Do not install the pump in an enclosed
cabinet unless a sufficient amount of fresh air is sup-
plied to the pump. Bring the ambient air temperature
down.
Possible Cause:
The automotive-type oil filter
clogged and pump does not receive enough oil.
Remedy:
Change the automotive oil filter.
Possible Cause:
Not enough oil in oil reservoir or
badly burned oil is used for pump lubrication.
Remedy:
Drain and refill the pump only with non-
detergent oil and increase oil change intervals.
Note:
On some high temperature applications, it may
be necessary to change to a high temperature oil such
as R590 or R570. Contact the factory for recommen-
dations.
4.7
Trouble
Pump is seized.
Possible Cause:
The pump operated without oil and
vanes broke.
Remedy:
Contact the nearest Busch Factory Service
Center for instructions.
Possible Cause:
The pump was operated for an
extended period of time in the wrong rotation.
Remedy:
Inspect vanes and replace. Contact the
nearest Busch Factory Service Center for instructions.
Possible Cause:
Liquid carryover into the pump
cylinder broke vanes while pump was running, or oil
broke vanes on start-up.
11
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Страница 120: ...RA 0165 0205 0255 0 0305 D Ref BMC Dwg T111 911 728 D 15 Fig 5 Exploded View Drawing of Pump ...