Possible Cause:
Wire mesh inlet screen plugged (Ref. 261).
Remedy:
Clean wire mesh inlet screen. Install inlet filter if prob-
lem repeats frequently.
Possible Cause:
No oil or not enough oil in oil reservoir.
Remedy:
Shut off the pump, add the necessary oil, or if oil seems
contaminated, drain balance of oil from pump,
exchange automotive oil filter, and refill with fresh oil.
Flush if necessary.
Possible Cause:
Automotive-type oil filter is dirty or clogged (where
applicable).
Remedy:
Replace automotive-type oil filter, exchange oil, if nec-
essary, and refill with fresh oil.
Possible Cause:
Inlet valve plate (Ref. 251) stuck in closed or partially
open position due to contamination.
Remedy:
Disassemble inlet valve and screen. Clean as required.
Possible Cause:
Oil tubing fittings are loose and leaking. Oil return line
broken on RC model.
Remedy:
Replace or retighten the oil fittings or oil tubing.
Replace only with same size tubing.
Possible Cause:
Shaft seal leaking.
Remedy:
Replace the shaft seal following disassembly and
assembly steps outlined in the Maintenance and Repair
Manual. Check the shaft seal. It should have a spring
installed inside and around the shaft sealing lip.
Possible Cause:
Exhaust valve (Ref. 159) is not properly seated or it is
partially stuck open (RA models only).
Remedy:
Follow disassembly and assembly steps outlined in the
Maintenance and Repair Manual or contact the nearest
Busch Factory Service Center.
Possible Cause:
Vanes are blocked in the rotor or they are damaged.
Remedy:
Free vanes or replace with new ones following disas-
sembly and assembly steps outlined in the
Maintenance and Repair Manual or contact the nearest
Busch Factory Service Center.
Possible Cause:
Radial clearance between the rotor and cylinder is no
longer adequate.
Remedy:
Follow disassembly and assembly steps outlined in the
Maintenance and Repair Manual on resetting the radial
clearance correctly or contact the nearest Busch
Factory Service Center.
Possible Cause:
Internal parts worn or damaged.
Remedy:
Follow disassembly and assembly steps outlined in the
Maintenance and Repair Manual and replace worn or
damaged parts or contact the nearest Busch Factory
Service Center.
Possible Cause:
Radial clearance between the rotor and cylinder is no
longer adequate.
Remedy:
Follow disassembly and assembly steps outlined in the
Maintenance and Repair Manual on resetting the radial
clearance correctly or contact the nearest Busch
Factory Service Center.
Possible Cause:
Internal parts worn or damaged.
10
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