18
Manual 1807 Rev B p/n 001807 0000
06
TROUBLESHOOTING
Although KINNEY® KC™ rotary piston vacuum pumps are well designed and manufactured, problems may
occur due to normal wear and the need for readjustment. The following chart lists symptoms that may occur
along with probable causes and remedies.
SYMPTOM PROBABLE CAUSE REMEDIES
Excessively high system
ultimate pressure
Faulty process
equipment
Check the pump performance. See Checking Pump
Performance on page 19.
Vacuum pump
improperly operating or
malfunctioning
Process equipment
contaminated by high
vapor pressure material
Clean the equipment with acetone, alcohol, or either.
Pump down with vacuum pump overnight.
Process equipment
leaks
Leak check the process equipment. See Process
Equipment Leaks on page 20.
Improper vacuum
pump oil ow
Clean the oil ducts.
Contaminated vacuum
pump oil
Change the pump oil. See Changing the Oil on page
14 and Oil Contamination on page 21.
Discharge valves
malfunctioning
Check the valves as described in Discharge Valve on
page 21.
Vacuum pump leaks
Leak check the pump as described in Pump Leaks on
page 20.
Vacuum pump shaft
seal malfunctioning
Check the shaft seal as described in Shaft Seal on
page 22.
Worn or damaged
vacuum pump internal
parts
Disassemble the pump and inspect the internal parts.
See Disassembly on page 24.
Excessive pump noise at
low pressures
Hydraulic noise of
pump discharge
Open the gas ballast valve.
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