Industrial / Air Master Series
Quincy Compressor
50161-105, March 2008
33
3501 Wismann Lane, Quincy Ill. - 62305-3116
SECTION 6
SECTION 6
SECTION 6
SECTION 6
SECTION 6
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
Trouble
Probable Cause
Low discharge pressure
•Restricted inlet
•Defective compressor valves or valve unloading mechanism
•Leaks in the compressed air distribution system at fittings, connections,
etc.
•Unloader pilot valve defective or set wrong
•Pressure switch defective or set wrong
•Drive belt slipping
•Incorrect speed
•Worn piston rings or loose piston
•Leaking head gasket
•Drain valve open
•Defective pressure gauge
•Excessive running clearances
(refer to
SECTION 2,
Specifications
)
•Pressure relief valve leaking
•Clogged intercooler
•Loose compressor valves or leaking at valve gaskets
•Compressor incorrectly sized for the altitude it is operating at
•Piston rings not seated; allow 100 hours at full pressure
Water in the crankcase
•Compressor does not run long enough to get hot and vaporize the liquids
(lubricant appears milky)
squeezed out of the air during compression
(compressor may be too large
for application)
•Incorrect or inferior grade of lubricant
•System pressure leaking back through discharge valve
Rusty valves
•Compressor operated too infrequently
and/or cylinders
•Compressor does not run long enough to get hot and vaporize the liquids
squeezed out of the air during compression
(compressor may be too large
for application)
•Compressor not properly prepared for storage
•Discharge line from compressor head is pointed upward allowing con
densation to drain back at shutdown
Excessive vibration
•Incorrect speed
•Compressor valves not functioning properly
•Loose pulley/sheave
•Motor or engine out of balance
•Compressor, motor or engine not secured tightly, or tightened into a
bind
•Foundation or frame inadequate
•Piping inadequately supported or tightened into a bind
•Excessive discharge pressure
•Compressor feet may need to be leveled with shims
Summary of Contents for Air Master Series
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