Quincy Compressor QT Series User Manual

QT/QTS Series Quincy Compressor
2022208700, September 2018 43
Trouble Probable Cause
Intercooler pressure •Compressor valves or head unloaders in first stage not functioning
abnormally low properly or defective
•Restricted air inlet filter or suction line
•Pilot valve or pressure switch set incor rectly or defective
•Pressurized air at head unloader not vent ing properly when demand for
air is re quired
•Compressor valve or head gasket leaking
•Worn piston rings
•Leaking air at intercooler or intercooler connections
Compressor overheats •Clogged intake system
•Defective compressor valves
•Pressure setting too high
•Clogged intercooler, internally or exter nally
•Inadequate ventilation, or recirculation of hot air
•Pulley/sheave rotation wrong
•Incorrect speed
•Lubrication inadequate
•Compressor incorrectly sized
High discharge •Compressor valve assemblies defective
temperature •Discharge pressure too high
•Inadequate ventilation or hot air recirculat ing
•Cooling surfaces of compressor or inter cooler excessively dirty
•Ambient temperature too high
•Scored or excessively worn cylinder walls
Compressor knocks •Head clearance insufficient
•Piston loose in cylinder bore, cylinder bore worn, piston or piston rings
worn
•Worn rods or main bearing
•Wrong pressure setting, discharge pressure excessive
•Crankcase lubrication inadequate
•Loose pulley/sheave

Quincy Compressor QT Series Specifications

General

Brand	Quincy Compressor
Model	QT Series
Category	Air Compressor
Language	English