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Quincy Compressor Q12120P - User Manual

Quincy Compressor Q12120P
18 pages
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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.
Manual No. 1312100602
September 2012 Edition
Single Stage Compressors
Instruction & Parts Manual

Table of Contents

Questions and Answers

  • B
    Brenda SnyderAug 20, 2025
    How to fix insufficient pressure at tool or accessory with Quincy Compressor Air Compressor?
    • C
      Cameron Gross DDSAug 20, 2025
      If you're experiencing insufficient pressure at the tool or accessory with your Quincy Compressor Air Compressor, consider the following: * Check for leaks or restrictions in the hose or piping and repair them. * Ensure the air intake isn't restricted by cleaning or replacing the filter. * Tighten the belt if it's slipping. * Replace the hose or connectors if they are too small. * Consider if the compressor is incorrectly sized; you might need a smaller tool or a larger compressor. * Ensure the regulator is turned up to high enough pressure; if faulty, replace the regulator.
  • C
    Casey MartinAug 25, 2025
    Why does the tank lose pressure rapidly when Quincy Compressor Air Compressor shuts off?
    • C
      Christian WongAug 26, 2025
      If the tank on your Quincy Compressor Air Compressor loses pressure rapidly after the compressor shuts off, it could be due to: * A loose connection or leak in the pipe, tank drain valve, tubing, fitting, or hose. Turn the unit off, unplug it, and then tighten or replace the fittings or components. * A faulty check valve, so replace the faulty check valve.
  • M
    Michael DuranAug 27, 2025
    Why is my Quincy Compressor Q12120P Air Compressor so noisy?
    • J
      James VincentAug 28, 2025
      Noisy operation in your Quincy Compressor Air Compressor can stem from several sources: * Lack of lubricant in the crankcase, so check for possible damage to bearings and add lubricant. * Loose pulley, flywheel, belt, compressor or motor fasteners, belt-guard, clamps, or accessories, so tighten where necessary. * Carbon deposits on the piston or valves, so remove the cylinder head and inspect for foreign matter on top of the piston and clean. * Worn main bearings, broken piston, worn wrist pins, wrist pin bearings, or loose connecting rod bolt.
  • A
    Amy SanchezAug 30, 2025
    Why does motor hum or run slowly when first turned on in Quincy Compressor Air Compressor?
    • C
      Caleb CaldwellAug 30, 2025
      If the motor hums or runs slowly when first turned on for your Quincy Compressor Air Compressor, it could be due to: * Using a light-duty extension cord, so use an additional hose instead of an extra extension cord or use a heavier gauge extension cord. * A loose electrical connection, so repair the electrical connections. * Low voltage, so check with a voltmeter. * The motor being sized incorrectly, so replace with a correctly sized motor. * A defective motor, so replace the motor. * The motor voltage not matching the voltage of the power source, so change the power cord & voltage of motor to match the voltage of the power source.
  • J
    jill64Sep 1, 2025
    What causes excessive vibrations in Quincy Compressor Q12120P?
    • S
      Sarah SchmidtSep 2, 2025
      Excessive vibrations in your Quincy Compressor Air Compressor may be caused by: * Misaligned or loose pulley & flywheel, so realign or tighten them. * A loose belt, so tighten the belt. * The compressor unit being bolted to an uneven surface or not bolted down at all (stationary models), so shim to level the surface & fasten to the floor if possible.
  • H
    hernandezmarioSep 4, 2025
    What to do if Quincy Compressor Q12120P overheats?
    • T
      Tyler JeffersonSep 4, 2025
      Quincy Compressor Air Compressor overheating can occur due to: * High ambient temperature or inadequate ventilation, so increase ventilation with cooler air. * Dirty cylinder & head cooling fins, so clean all outer surfaces of the compressor. * The unit being undersized for the application, so re-evaluate application requirements and re-size if necessary. * Insufficient lubrication, so inspect for proper lubricant and amount. * A restriction in the head or check valve, so inspect, clean or replace.
  • J
    jvelasquezSep 6, 2025
    What causes excessive lubricant consumption in Quincy Compressor Q12120P Air Compressor?
    • K
      Kimberly AdamsSep 6, 2025
      Excessive lubricant consumption or excessive lubricant in the hose of your Quincy Compressor Air Compressor can result from: * The crankcase being overfilled with lubricant, so drain the lubricant and refill to the proper level with the proper lubricant. * Lubricant leaks, so tighten bolts on the compressor to the proper torque or replace gaskets. * Wrong lubricant viscosity, so drain the lubricant & refill with the proper lubricant. * The compressor being on an unlevel surface, so level the compressor. * A plugged crankcase breather, so clean or replace the crankcase breather.
  • D
    Donna CohenSep 9, 2025
    Why does the pressure relief valve continually "pops" on Quincy Compressor Q12120P Air Compressor?
    • B
      Bryan HarrisSep 9, 2025
      If the pressure relief valve on your Quincy Compressor Air Compressor continually pops, it could be due to: * A defective pressure switch, so replace the pressure switch. * A faulty pressure switch setting. * A defective pressure relief valve, so replace the pressure relief valve.
  • K
    Karen JuarezSep 12, 2025
    Why is there moisture in the discharge air from my Quincy Compressor Q12120P Air Compressor?
    • D
      droseSep 12, 2025
      Moisture in the discharge air of your Quincy Compressor Air Compressor is likely due to: * Condensation in the tank, caused by a high level of atmospheric humidity or the compressor not being run long enough, so drain the tank after every use. Drain the tank more frequently in humid weather and use an air line filter.
  • M
    Mary BakerSep 14, 2025
    Why is the crankcase lubricant milky in my Quincy Compressor Air Compressor?
    • E
      Eileen PaulSep 14, 2025
      If the crankcase lubricant in your Quincy Compressor Air Compressor is milky, it's likely due to: * Water in the lubricant due to humidity or condensation, so change the lubricant and move the compressor or air inlet to a less humid atmosphere.

Summary

Quincy Compressor Warranty Information

Warranty Coverage Details

Details the scope of defects covered by the compressor warranty.

Company Obligations Under Warranty

Explains how Quincy Compressor will address defects.

How to Obtain Service

Provides instructions for obtaining warranty service and support.

Warranty Exclusions

Lists exclusions from the compressor warranty coverage.

Limits of Company Liability

Safety Precautions

Installation Guidelines

Electrical Information and Connections

Overload Relay Protection

Mounting Stationary Units

System Components Overview

Pre-Starting Checklist

Starting and Stopping the Compressor

Maintenance Procedures

Troubleshooting Common Issues

Quincy Compressor Q12120P Specifications

General IconGeneral
BrandQuincy Compressor
ModelQ12120P
CategoryAir Compressor
LanguageEnglish

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