Quincy Compressor QT-54 - User Manual

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This manual contains important safety information and must be

carefully read in its entirety and understood prior to installation

by all personnel who install, operate and/or maintain this product.

On-line product registration, parts ordering and warranty information is available at www.quincycompressor.com

THIS PRODUCT CAN EXPOSE YOU TO CHEMICALS INCLUDING LEAD,

WHICH IS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER

AND BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. FOR MORE

INFORMATION GO TO WWW.P65WARNINGS.CA.GOV

Manual No. 2022208700

September 2018 Edition

QT and QTS Series

Compressors

Instruction Manual

Other manuals for Quincy Compressor QT-54

User Manual20 pages

Questions and Answers

Y
ycameronAug 13, 2025
Why is the discharge pressure low on my Quincy Compressor Air Compressor?
- J
  Jacob AcostaAug 13, 2025
  If your Quincy Compressor Air Compressor experiences low discharge pressure, it might be due to several reasons. First, the compressor could be too small for the application, in which case you should reduce air demand or use a compressor with more air capacity. Second, air leaks could be the culprit; listen for them and apply a soap solution to fittings and connections to identify and tighten or replace the leaking components. Third, a restricted intake air could be the cause; clean or replace the air filter. Fourth, blown gaskets can lead to low pressure, so replace any necessary gaskets. Lastly, broken or misaligned valves can cause this issue; remove the head and inspect, replacing valves if needed.
V
vroblesAug 16, 2025
Why doesn't my Quincy Compressor Air Compressor tank hold pressure?
- J
  Jill NielsenAug 16, 2025
  If your Quincy Compressor Air Compressor tank does not hold pressure when not running and the shut-off valve is closed, it could be due to a few reasons. A malfunctioning check valve is a common cause, so replace it. Loose fittings or connections can also lead to pressure loss; tighten or replace them. Lastly, inspect the tank for any cracks or pinholes; if found, replace the tank and do not attempt to repair it.
E
Eric RichardsAug 20, 2025
How to fix excessive knocking noise in my Quincy Compressor Air Compressor?
- J
  Jordan SimsAug 20, 2025
  If your Quincy Compressor Air Compressor is excessively noisy with a knocking sound, several factors could be the cause. Ensure the drive pulley or flywheel is tightened. Low oil levels can also lead to knocking, so check for proper oil level. It may cause bearing damage. Another cause may be worn connecting rod or connecting rod bearing, which would require replacing the connecting rod and/or connecting rod bearings. Lastly, a noisy check valve can also produce this sound, and you would need to replace the check valve.
J
jonathan91Aug 25, 2025
What to do if my Quincy Compressor Air Compressor will not run or the motor hums?
- D
  Debra DavisAug 25, 2025
  If your Quincy Compressor Air Compressor will not run or the motor hums, begin by checking the voltage with a voltmeter across both legs of incoming power, and check the reset button on the motor. Also, a malfunctioning pressure switch can prevent the compressor from running, so repair or replace the pressure switch. Finally, a malfunctioning check valve may be the issue, so replace the check valve or pressure switch.
R
Robert GonzalesAug 28, 2025
Why is there excessive oil carryover in my Quincy Compressor Air Compressor?
- A
  Abigail SwansonAug 28, 2025
  Excessive oil carryover in your Quincy Compressor Air Compressor can stem from several issues. Worn piston rings are a common cause, so replace them with new ones. Restricted intake air can also contribute; clean or replace the air filter. Ensure the oil level isn't too high by draining it to the proper level. Finally, using the incorrect oil viscosity can lead to this problem; use a quality non-detergent SAE 40 (ISO 150) oil.
S
Samantha OwensAug 31, 2025
Why is my Quincy Compressor Air Compressor overheating?
- C
  Christopher SmithAug 31, 2025
  If your Quincy Compressor Air Compressor is overheating, consider these potential causes: the compressor might be too small for the application, in which case you should reduce air demand or use a compressor with more air capacity. Another reason may be dirty cooling surfaces, so clean all cooling surfaces of dirt and dust. Finally, improper cooling can lead to overheating; ensure the compressor is installed in an area with adequate cool, dry air.
C
Crystal WatkinsSep 4, 2025
How to reduce excessive vibration in my Quincy Compressor Air Compressor?
- K
  Kimberly HammondSep 4, 2025
  Excessive vibration in your Quincy Compressor Air Compressor can be attributed to a few factors. Ensure the unit is mounted on a level surface with vibration pads for proper installation. Loose belts can also cause vibration; replace the belts and align and tighten them properly. Misaligned flywheel or drive pulley can also lead to this issue; align the flywheel and drive pulley.
D
David WebbSep 8, 2025
What causes the pressure switch not unloading on my Quincy Compressor Air Compressor?
- E
  Eric GarrettSep 8, 2025
  If the pressure switch on your Quincy Compressor Air Compressor is not unloading, it is likely malfunctioning. Replace the pressure switch if it does not release air pressure briefly when the unit shuts off.

Quincy Compressor QT-54 Specifications

General

Model	QT-54
Max Pressure	175 PSI
Phase	Single
Voltage	230V
Pump Type	Cast Iron

Summary

SECTION 1 SAFETY

Safety First

Core safety principles and definitions of hazard levels.

SECTION 3 INSTALLATION

Receiving Delivery

Location

Electrical Supply Requirements

Requirements for electrical installation, including codes and voltage.

Mounting

Mounting Mobile Units

System components

Induction System

Air Intake

Compressed Air Discharge System

Pressure Vessels

Safety standards and requirements for air receiver tanks and other pressure vessels.

SECTION 4 START-UP & OPERATION

Pre-starting Checklist

Essential checks to perform before connecting the unit to a power source.

Initial Starting & Operating

Procedures and recommendations for the first startup and initial operation period.

Daily Starting Checklist

Routine checks to perform before starting the compressor daily.

SECTION 5 MAINTENANCE & LUBRICATION

Stopping for Maintenance

Procedures for safely stopping the compressor for maintenance or service.

Maintenance Schedule

Guidelines for developing a routine maintenance schedule for optimal performance.

Servicing Reed Valves

Lubrication

Information on checking lubricant levels, types, and specifications.

Pulley; Sheave Alignment & Belt Tension

Pressure Switch Adjustment

PILOT VALVE ADJUSTMENTS

SECTION 6 TROUBLESHOOTING

Low discharge pressure

Potential causes for reduced air pressure output from the compressor.

Water in the crankcase (lubricant appears milky)

Rusty valves and;or cylinders

Excessive vibration

Common causes of abnormal vibration during compressor operation.

Excessive drive belt wear

Low oil pressure

Potential issues leading to insufficient oil pressure in the system.

Compressor loads and unloads excessively

Causes for frequent or improper cycling of compressor operation.

Defective pressure switch

Excessive air pressure in air receiver

Excessive intercooler pressure

Intercooler pressure abnormally low

Compressor overheats

Factors leading to excessive operating temperatures in the compressor.

High discharge temperature

Reasons for elevated temperatures of the discharged air.

Compressor knocks

Excessive oil consumption

Excessive current draw

Causes of the motor drawing excessive electrical current.

Failure to start

Common reasons why the compressor fails to start.

Motor stalls

Causes for the motor stopping or failing to run during operation.

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