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Quincy QR-25 Series Instruction Manual

Teardown & rebuild
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Instruction Manual
Information contained in this manual is presented as typical to all
QR-25 Series compressors. Photos, graphics and verbiage may or
may not be model specific. This manual contains important safety
information and should be carefully read and understood by all
personnel who service this product.
® ® ® ® ®
Series
Series
Series
Series
Series
Manual No. 50255-101
September 2008 Edition

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Summary of Contents for Quincy QR-25 Series

  • Page 1 Instruction Manual Information contained in this manual is presented as typical to all QR-25 Series compressors. Photos, graphics and verbiage may or may not be model specific. This manual contains important safety information and should be carefully read and understood by all personnel who service this product.

  • Page 3: Table Of Contents

    TOOLS AND P TOOLS AND PAINT AINT AINT AINT SECTION 6 SECTION 6 TOOLS AND P TOOLS AND P AINT Tools ................................21 Paint ................................22 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 4: Safety First

    SAFETY Safety First At Quincy Compressor safety is not only a primary concern, but a faithfully performed practice. Beginning with the design stage, safety is built into “The World’s Finest Compressor”. It is the intention of this manual to pass along the “safety first”...
  • Page 5 •Alterations must not be made to this compressor without Quincy Compressor’s approval. Do not operate a Quincy Compressor in excess of 250 PSIG unless it has been WARNING ! tested and certified for high pressure application by Quincy Compressor prior to shipment.

  • Page 6: Teardown

    Preparation A clean, well lighted area with ample space to move about the compressor must be available for the teardown and rebuild of a Quincy QR-25 series compressor. Working in a confined area can lead to dangerous situations, so allow yourself plenty of room. Mount the basic compressor on a rigid, sturdy workbench before beginning the teardown and rebuild procedures.

  • Page 7: Removal Of Unloaders And Heads

    Connecting rods and caps must be correctly matched during reassembly. Do not allow these components to be reversed or interchanged at any time. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 8: Removal Of Oil Pump, Bearing Carrier And Crankshaft

    A hydraulic press should be used to remove crankshaft bearings and cups, and a ring expander should be used to remove piston rings. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 9: Cleaning And Inspection

    Refer to the appropriate parts book for genu- ine Quincy Compressor parts available from an authorized Quincy distributor. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 10: Rebuild

    An improperly honed cylinder can result in excessive oil consumption or loss of air delivery. Consult the factory for proper honing specifications. Typical Head Assembly QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 11: Reassembly Of Heads

    Reassembly of Heads Refer to the illustration on page 8 during reassembly of the heads. All gaskets must be replaced with new gaskets and Quincy Compressor recommends using new diaphragms in the unloader assemblies. Step 1. Properly seat new valve gaskets in the valve pockets of the head.

  • Page 12: Reassembly Of Pistons And Rods

    Step 4. Install capscrews and torque to specifications. Step 5. Turn the assembly over and carefully install the smaller o-ring on the oil pump driveshaft. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 13: Reassembly Of Crankshaft In Crankcase

    Insert two alignment studs in threaded holes at opposite corners of the crankcase. Step 4. Carefully position the cylin- der (pistons and rods included) over the alignment studs. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 14: Reassembly Of Head To Cylinder

    (refer to drive belt installation and tension set- ting instructions in the associated in- struction manual) and belt guard. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 15: Retorque Capscrews

    Step 10. Immediately check for proper oil pressure at time of startup. Refer to instructions and specifications in the QR-25 Series instruction manual. Insufficient oil pressure during operation of QR-25 Series compressors will CAUTION ! result in severe mechanical damage to the compressor.

  • Page 16: Standard And Oversize Cylinder Bore Dimensions

    SPECIFICATIONS Standard & Oversize Cylinder Bore Dimensions Standard and oversize pistons and rings are available for many QR-25 series compressors. Refer to the individual parts books for specific part numbers. Prior to reassembly, cylinders must be honed. If oversize pistons and rings are to be used, the cylinder must be bored and honed to the correct and precise dimensions listed in this manual.
  • Page 17 4.0100 4.5000 4.5100 4.504 4.514 5.0005 5.0105 255 Vac 5825-1 W280 Vac 1333 4.503 4.513 5.0000 5.0100 4.504 4.514 270 Vac 7281-1 4.503 4.513 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 18: Crankshaft Throw Diameters

    111238-001 1.2495 2.2481 212, 216, 1.7505 2.2485 110218 112521 308, 310 1.7500 2.2480 230, 240, 1.7505 5080, 5105, 2.2485 110216 110226-001 1.7500 5120 2.2480 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 19: Piston Ring Clearances (Single Stage Models)

    .025 .025 .005 .005 .005 .005 .005 240VAC .023 .023 .023 .023 .023 .005 .005 .005 .005 .005 244VAC .023 .023 .023 .023 .023 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 20: Piston Ring Clearances (Two Stage Models)

    .025 .025 .027 .065 .015 .020 .020 .010 .010 .015 .025 .005 .005 .005 .010 5120 .025 .025 .027 .065 .015 .015 .020 .050 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 21: Clearances

    .0004 .0015 .0018 .0009 .0030 .0015 .0004 .009 .0030 .0009 .011 .0015 .0004 .009 .0030 .0009 .011 .0015 .0004 .009 4125 .0030 .0009 .011 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 22: Crankshaft End Play

    .0015 .0035 .0005 .0015 .0015 .003 .0015 .003 .0015 .003 .0015 .003 .002 4110 .0035 .002 4125 .0035 .001 R-15 .002 .001 R-17 .002 QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...

  • Page 23: Tools And Ptools And Paint Tools And Paint

    TOOLS AND P TOOLS AND PAINT TOOLS AND P AINT AINT Tools High quality tools are available from Quincy Compressor to make the job of servicing QR-25 series compressors easier. Refer to the chart below for model specific applications. Removes Part Description...

  • Page 24: Paint

    Paint Quincy Compressor Blue II paint is available in individual 12 ounce spray cans. Order part number 125244-129. QR-25 Teardown & Rebuild Quincy Compressor 50255-101, September 2008 3501 Wismann Lane, Quincy IL - 62305-3116...
  • Page 26 Air Master Air Master 217.277.0270 Air Master Air Master E-mail: E-mail: E-mail: E-mail: E-mail: info@quincycompressor.com W W W W W ebsite: ebsite: ebsite: ebsite: ebsite: quincycompressor.com © 2006 Quincy Compressor, an EnPro Industries company quincyairmaster.com All Rights Reserved. Litho in U.S.A.

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