QR-25 Series
Quincy Compressor
52201-107, December 2012
30
3501 Wismann Lane, Quincy IL - 62305-3116
SECTION 6
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 defective or set wrong
•Pressure switch defective or set wrong
•Drive belt slipping
•Incorrect speed
•Worn piston rings or loose piston
•Faulty hydraulic unloader
•Leaking head gasket
•Low oil pressure
•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 alti tude 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 dis charge valve
Rusty valves
•Compressor operated too infrequently
and/or cylin ders
•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 stor age
•Discharge line from compressor head is pointed upward allowing con
densation to drain back at shutdown
Excessive vibration
•Incorrect speed
•Compressor valves not functioning prop erly
•Loose pulley/sheave
•Motor or engine out of balance
•Compressor, motor or engine not secured tightly, or tightened into a
bind
Содержание QR-25 210
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