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Quincy Air MasterQT SeriesModel QT-7.5 Parts Manual · Record of Change 201This manual contains important safetyinformation and should be made availableto all personnel who operate and/ormaintain this product. Carefully read thismanual before attempting to operate orperform maintenance on this compressor.Fill Out & ReturnWarranty Registration Card Located InsideManual No. 50121M201May 2001 EditionManual Brought to You By: IndustrialAirPower.com
TABLE OF CONTENTSINTRODUCTIONThis manual provides information for the Model QT-7.5reciprocating compressor, per Record of Change 201.Model & Serial Number Identification . 2Ordering Replacement Parts . 2The Model QT-7.5 is an aircooled, two stage, two cylinder,pressure lubricated compressor, with up to 175 p.s.i. continuous pressure capability. It has a 4.5" low pressure bore and a2.50" high pressure bore, with a 3" stroke. This compressor canbe run at 500-1060 r.p.m.Quin-Cip Oil . 2Crankcase Lubricant Capacity . 2Crankshaft Group . 3Crankcase Group . 4A hooded air filter/silencer is available as an option, as wellas head unloaders.Connecting Rod & Piston Groups . 5-8Cylinder & Head Groups . 9-12Control Piping Schematics . 13CHANGESPilot Valves . 14Pilot Valve Repair Kit . 14since previous printing dated September 1998:Differential Setting Chart . 14Added crankcase lubricant capacity.Suction Valve Unloader Assemblies . 15Decals . 15Changed to heavy-duty type head bolt washer.Overhaul Kit . 16Added intercooler replacement kits.Head Kit . 16Changed tank drain valve from cable operated to ball valveoperated.Recommended Spare Parts . 16Gasket Set . 16Changed throttle control on engine driven units to bullwhipcable style.Typical Unit Repair Parts List . 17-19Changed Kohler engine driven base units from headunloader style to discharge line unloader style.Change bearing carrier and cylinder/crankcase bolts to usenew type bolt with pre-applied sealantCrankcase was modified to accept 3/4 npt pipe plug or 3/4npt low oil level switch.QT-7.5 Air Master50121M201, May 2001Quincy Compressor13501 Wismann Lane, Quincy IL 62305-3116
MODEL &SERIAL NUMBERIDENTIFICATIONQUIN-CIP OILRecordofChange No.Refer to the chart below to order QUIN-CIP compressor oil from your local Authorized Quincy CompressorDistributor.PackagePart No.DescriptionModel & Serial NumberIdentification TagThe model & unit serial number identification tag islocated on the air tank top plate.Serial NumberThe basic compressor serial number decal is locatedon the cylinder flange. Fill in the numbers from yourcompressor unit and basic compressor in the corresponding spaces provided here, and reference thispage when ordering replacement parts.BarrelPailGallonGallon CaseQuartQuart Q032112541C03255 gal., SAE 10W5 gal., SAE 10W1 gal., SAE 10W(4)-1 gal., SAE 10W1 qt., SAE 10W(12)-1 qt., SAE 10WBarrelPailGallonGallon CaseQuartQuart Q068112542C06855 gal., SAE 205 gal., SAE 201 gal., SAE 20(4)-1 gal., SAE 201 qt., SAE 20(12)-1 qt., SAE 20BarrelPailGallonGallon CaseQuartQuart Q100112543C10055 gal., SAE 305 gal., SAE 301 gal., SAE 30(4)-1 gal., SAE 301 qt., SAE 30(12)-1 qt., SAE 30CRANKCASE LUBRICANTCAPACITYAll replacement parts are to be ordered through anauthorized Quincy Compressor Distributor. Insist ongenuine Quincy parts only! Failure to do so may voidwarranty.ModelCapacityQT-7.515/8 Qts. (1.5 lit.)CAUTION !Refer to the AirMaster Series instruction manual for vitallubrication information.ORDERINGREPLACEMENT PARTSCAUTION !Follow all safety precautions outlined in the AirMasterTwoStage Series instruction manual.Prompt service can be rendered on repair parts orders if the following information is given:Item 1) the model number, record of change number, & serial number.Item 2) the exact part number needed. (Do notorder by item numbers.)Item 3) the exact quantity needed.Item 4) the preferred type of transportation.WARNING !Do not operate this compressor without a totally enclosedbelt guard or any other required safety equipment.DANGER !Air used for breathing or food processing must meet O.S.H.A.1910.134 or F.D.A. 21 C.F.R. 178.3570 regulations. Failure todo so may cause severe injury or death.QT-7.5 Air Master50121M201, May 2001Quincy Compressor23501 Wismann Lane, Quincy IL 62305-3116
CRANKSHAFT GROUPElectric Motor Driven Group # 113684-002 - Engine Driven Group # 113602X002113602-002111107111780* 113944OR** 113944-001110428N075114041Descriptioncrankshaft assembly (includes items 2, 3 & 4)crankshaft (N.S.S.; order 113602X002)ball bearingball bearingsheave, 14.16 o.d., 1 groove, B section, CCW rotationsheave, 14.16 o.d., 2 groove, B section, CCW rotationflatwasher, 3/4hex. nut, 3/4 -16 unf, left hand threadN.S.S. Not Sold Separate* For electric motor driven models (1 groove sheave)** For engine driven models (2 groove sheave)QT-7.5 Air Master50121M201, May 2001Quincy Compressor33501 Wismann Lane, Quincy IL 62305-3116
CRANKCASE GROUP 113683-002ItemNumber1* 23* 25111106Descriptioncrankcasepipe plug, 3/4 nptpipe plug, 1/2 nptsight glass, 1/2 nptgasket, bearing carrierbearing carrier assemblyhex. screw, 3/8-16 unc x 1.25, grade 5, with sealantbreather tubecrankcase breatherblankoil seal* Install with Slic-Tite or Teflon tape.QT-7.5 Air Master50121M201, May 2001Quincy Compressor43501 Wismann Lane, Quincy IL 62305-3116
CONNECTING ROD & PISTON GROUP 114192(low pressure)QT-7.5 Air Master50121M201, May 2001Quincy Compressor53501 Wismann Lane, Quincy IL 62305-3116
CONNECTING ROD & PISTON GROUP 114192(low ecting rod assembly (includes items 2, 3 & 4)connecting rod (N.S.S.; order 113936-001)connecting rod cap (N.S.S.; order 113936-001)taptite screw, 5/16-18 unc x 1.75piston, lppiston pin (N.S.S.; order 114420-050)piston pin plugpiston ringpiston ringoil ring railoil ring expander8643-0108643-020114209low pressure piston (.010 oversize)low pressure piston (.020 oversize)Piston Ring Set (standard) (No Color Code)includes all rings necessary for installing standard ringsPiston Ring Set (.010 oversize) (L. Blue)includes all rings necessary for installing .010 oversize ringsPiston Ring Set (.020 oversize) (Yellow)includes all rings necessary for installing .020 oversize ringsPiston Assembly, LP (standard)includes piston, ring set, piston pin & piston pin plugsPiston Assembly, LP (.010 oversize)includes piston, ring set, piston pin & piston pin plugsReplacement Piston Pin Assembly, LPincludes piston pin & 50Maintenance PartsN.S.S. Not Sold SeparateQT-7.5 Air Master50121M201, May 2001Quincy Compressor63501 Wismann Lane, Quincy IL 62305-3116
CONNECTING ROD & PISTON GROUP 114193(high pressure)QT-7.5 Air Master50121M201, May 2001Quincy Compressor73501 Wismann Lane, Quincy IL 62305-3116
CONNECTING ROD & PISTON GROUP 114193(high 190-010111105-0021139911652111281111280connecting rod assembly (includes items 2, 3, 4 & 5)connecting rod (N.S.S.; order 113936-003)connecting rod cap (N.S.S.; order 113936-003)taptite screw, 5/16-18 unc x 1.75needle bearingpiston pin (N.S.S.; order 114420-051)piston pin plugpistonpiston ringoil ring railoil ring expander1113991-010114210high pressure piston (.010 oversize)Piston Ring Set (standard)includes all rings necessary for installing standard ringsPiston Ring Set (.010 oversize)includes all rings necessary for installing .010 oversize ringsPiston Assembly, HP (standard)includes piston, ring set, piston pin & piston pin plugsPiston Assembly, HP (.010 oversize)includes piston, ring set, piston pin & piston pin plugsReplacement Piston Pin Assembly, HPincludes piston pin & ionMaintenance PartsN.S.S. Not Sold SeparateQT-7.5 Air Master50121M201, May 2001Quincy Compressor83501 Wismann Lane, Quincy IL 62305-3116
CYLINDER & HEAD GROUP 113685-002(less head unloaders)QT-7.5 Air Master50121M201, May 2001Quincy Compressor93501 Wismann Lane, Quincy IL 62305-3116
CYLINDER & HEAD GROUP 113685-002(less head 31415161718* 1920* 9-024114004112225-2123478-L07cylindergasket, valve plate to cylindervalve plate assemblyvalve plate (N.S.S.; order 113946X1)reed valve (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)reed valve (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)reed valve , (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)flathead screw, 1/4-20 unc x 1.00, grade 8hex. nut, 1/4-20 uncgasket, valve plate to cylinder headcylinder head, plainhardened flatwasher, 3/8hex. screw, 3/8-16 unc x 3.25, grade 9gasket, cylinder to crankcasepressure relief valvehex. screw, 3/8-16 unc x 1.25, grade 5, with sealanttube fitting, 90 male elbow, 3/4 tube x 3/4 nptintercooler (N.S.S.; order Intercooler Replacement Kit)intercooler clamphex. screw, 3/8-16 unc x .50, grade 51114419-0011114004KValve Assembly Replacement Kitincludes items 2, 3, 14, 16, 17 & instructionsIntercooler Replacement Kitincludes intercooler and nut / sleeve fittingsDescriptionMaintenance PartsN.S.S. Not Sold Separate* Install with Slic-Tite or Teflon tape.QT-7.5 AIR FILTERSardndatS110377F100 Air Filter(Requires 110377E100Air Filter Element)lnatiopO110377S100 & 110377S101Hooded Air Filter / Silencer(Requires 110377E100Air Filter Element)QT-7.5 Air Master50121M201, May 2001110377E100Air Filter ElementQuincy Compressor103501 Wismann Lane, Quincy IL 62305-3116
CYLINDER & HEAD GROUP 113685-003(with head unloaders)QT-7.5 Air Master50121M201, May 2001Quincy Compressor113501 Wismann Lane, Quincy IL 62305-3116
CYLINDER & HEAD GROUP 113685-003(with head 114411661161121121116 cylindergasket, valve plate to cylindervalve plate assemblyvalve plate (N.S.S.; order 113946X1)reed valve (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)reed valve (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)reed valve , (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)valve bumper (N.S.S.; order 113946X1)flathead screw, 1/4-20 unc x 1.00, grade 8hex. nut, 1/4-20 uncgasket, valve plate to cylinder headcylinder head, unloaderhardened flatwasher, 3/8hex. screw, 3/8-16 unc x 3.25, grade 9gasket, cylinder to crankcasepressure relief valvehex. screw, 3/8-16 unc x 1.25, grade 5, with sealantunloaderunloader"o"ring, siliconetube fitting, 90 male elbow, 1/4 tube x 1/4 npttube fitting, male, 1/4 tube x 1/4 pipetube fitting, 90 male elbow, 3/4 tube x 3/4 nptintercooler (N.S.S.; order Intercooler Replacement Kit)intercooler clamphex. screw, 3/8-16 unc x .50, grade 5tubing, 1/4" (not shown, links items 24 & 25)1114419-0011114004KValve Assembly Replacement Kitincludes items 2, 3, 14, 16, 17 & instructionsIntercooler Replacement Kitincludes intercooler and nut / sleeve fittingsN.S.S. Not Sold Separate* Install with Slic-Tite or Teflon tape.ardndatS110377F100 Air Filter(Requires 110377E100Air Filter Element)DescriptionMaintenance PartsQT-7.5 AIR FILTERSalonitOp110377S100 & 110377S101Hooded Air Filter / Silencer(Requires 110377E100Air Filter Element)QT-7.5 Air Master50121M201, May 2001110377E100Air Filter ElementQuincy Compressor123501 Wismann Lane, Quincy IL 62305-3116
CONTROL PIPING SCHEMATICSdischarge linecheck valverelief valveControl PipingFor Automatic Start/Stop(with loadless starting)release valvepressure switchpressure gaugeto low and highpressurehead unloadersdischarge linecheck valveControl PipingFor Continuous Runrelief valvepressure gaugepilot valveto low and highpressurehead unloadersdischarge linecheck valverelief valveControl PipingFor Dual ControlPilot valve is open (stem screwed out)pressure gaugefor Continuous Run operationPilot valve is closed (stem screwed in)release valvepilot valvewith lockout stempressure switchPIX 1186.epsQT-7.5 Air Master50121M201, May 2001Quincy Compressor133501 Wismann Lane, Quincy IL 62305-3116
PILOT VALVES110832 Series Pilot Valve (continuous run operation)110998 Series Pilot Valve (dual control operation)Add dash # listed below to 110832 (per pressure setting) toobtain correct pilot valve.Dash #Load PSIAdd dash # listed below to 110998 (per pressure setting) toobtain correct pilot valve.Unload PSI-10090100-997*30-70 adjustable-998*71-150 adjustable-999*151-175 adjustable* Customer to set, see differential setting chart. Additionalfactory preset valves are available upon request.Pilot Valve Repair Kit 110832-05112345PartNumber2111 see chart below1Load PSIUnload PSI-115-140-165100125150115140165Differential Setting ChartCan be used to repair 110832 series pilot valves only. Customer must specify which spring when ordering repair kit.Item#Qty.Dash #Applies to 110998 series pilot valves only.Descriptionscreenfilter"o"ringpilot valve springballUnload(p.s.i.)Min. Dif.(p.s.i.)Max. l Setting ChartSpring Part #(item 4)Unload(p.s.i.)110832-052 (red)30"40"50"60"70110832-053 (yellow) 80"90"100"110"120"130"140"150110832-054 (green) 160"170"175Min. Dif.(p.s.i.)Max. 152023WARNING !Not all pilots are for use with all compressor systems. Makesure that the pilot you order is set within the safe operatinglimits of your compressor. Failure to heed this warningcould result in an explosion.QT-7.5 Air Master50121M201, May 2001Quincy Compressor143501 Wismann Lane, Quincy IL 62305-3116
SUCTION VALVEUNLOADER ASSEMBLIESInstallationDescriptionThe Quincy suction valve unloader assembly consistsof unloading assemblies on the suction valves, havinga plunger to contact the suction valve reed and anunloader pilot valve (110832 or 110998 series) toautomatically regulate the passing of air tank pressure to the unloading arrangement.Continuous Run OperationSuction valve unloader assemblies are recommendedfor use on Quincy compressors where the compressoris to run continuously and a constant pressure is to bemaintained. The purpose is to automatically unseatthe suction valve of the compressor when the airsupply is greater than the demand.Unloading occurs when air tank pressure is sufficient to overcome pilot valve spring pressure. Thecheck ball is then unseated, allowing air tank pressure to pass to the unloader assemblies. The compressor will run unloaded until the air tank pressuredrops to a predetermined level. At this time, theaction of the ball is reversed, shutting off air tankpressure to the unloader assemblies and venting theunloader to atmosphere. This allows the compressorto load. The drive, either electric motor or engine,runs continuously and must be started and stoppedmanually. 110832 series pilot valves feature a togglelever which can be flipped to provide manual unloading.The pilot valve is mounted directly into the air tank. Compressors in the field, not equipped with these controls, can beconverted. Consult your local Quincy Compressor Distributorfor assistance with conversion procedures.ServiceIf a change in pilot valve operation is detected, remove the pilot valve from the air tank and check thescreen in the inlet of the pilot valve for obstructions.Clean the screen if necessary.AdjustmentThe unloading pressure is adjustable and is regulated by turning the unload adjustment hex nut (referto pilot valve illustrations). Turn the hex nut clockwise to increase and counterclockwise to decrease theunloading pressure.The differential (difference between unloadingand loading pressure) is set by turning the differential adjustment hex nut (refer to pilot valve illustrations). Increase the differential pressure by turningthe hex nut clockwise - decrease by turning counterclockwise. Make all adjustments in small increments.Tighten the locknuts after adjustment.DECALSDual Control OperationDual control operation is designed to provide achoice between "start/stop" or "continuous run" operation. The 110998 series pilot valve can be set for"start/stop" operation by turning the knurled knob atthe end of the pilot valve (refer to illustration for110998 series pilot valve) clockwise until it stops.Under these circumstances, a pressure switch isrequired to stop the motor. Failure to use a pressureswitch, with the pilot valve locked out, will result inunsafe conditions.WARNING !A pressure switch must be incorporated whenever 110998series pilot valve is employed as part of the control system.DecalsThe compressor will operate in the continuous runmode if the knurled knob is turned counterclockwise until itstops.QT-7.5 Air Master50121M201, May BDescriptionserial number & nameplatedecal, CAUTION!, MANUALdecal, DANGER!,"Air from this."Quincy Compressor153501 Wismann Lane, Quincy IL 62305-3116
Overhaul Kit 936-001113936-003Gasket Set 114418Item#DescriptionQty.11111Piston Ring SetPiston Ring SetGasket Setvalve plate assemblyair filter elementpiston pinpiston pincrankcase breatherconnecting rod assembly, LPconnecting rod assembly, riptiongasket,gasket,gasket,gasket,oil sealvalve plate to headcylinder to valve platecrankcase to cylinderbearing carrierRecommended Spare PartsItem#Head Kit 01 Replacement Valve Assembly110377E100 air filter elementQT-7.5 Air Master50121M201, May 2001Qty.PartNumberDescription110377E100 air filter element, (fits 110377F100110377S100 and 110377S101 airfilters)114418gasket set114419-001 replacement valve assemblyQuincy Compressor163501 Wismann Lane, Quincy IL 62305-3116
TYPICAL UNIT REPAIR PARTS LISTThe parts listed here are for standard QT-7.5 (up to 175 p.s.i.) units and may or may not be applicable to custom built units. Check withyour local authorized AirMaster Distributor for parts that can be used for custom built units. Make sure the components you order are ratedwithin the safe operating limits of your system. If you are doubtful about which components to order, contact your local AirMasterDistributor.(QT-7.5 simplex - horizontal tank - electric motor)PartQty Number111111114 ft.2180 K0171117.5 H.P.110258B06111082889301115/230v, 1Ø* 127466J018PartNumberPartNumber120 110945K017Descriptiontank (200 psi maximum operating pressure)tank drain valveservice valvepressure gaugepressure switchpressure relief valve (in tank; 200 psi)pressure relief valve (in discharge line; 215 psi)check valvedischarge tubetube fitting, nut with sleevebelt guard assemblydrive beltmotor pulleymotor bushing200v, 3Ø8393230/460v, 3Ø124517-0097.5 h.p. motor (O.D.P.)* 230 volt onlyPart numbers shown in italics apply to tank mounted units and base mounted units.(QT-7.5 duplex - horizontal tank - electric motor)PartQty Number1211121228 ft.22120 48-075110945K0172227.5 H.P.110258B06111082889301115/230v, 1Ø* 127466J018PartNumberPartNumber200 48-075110945K017Descriptiontank (200 psi maximum operating pressure)top platetank drain valveservice valvepressure gaugepressure switch, 135-175 p.s.i.pressure relief valve (in tank; 200 psi)pressure relief valve (in discharge line; 215 psi)check valvedischarge tubetube fitting, nut with sleevebelt guard assemblydrive beltmotor pulleymotor bushing200v, 3Ø8393230/460v, 3Ø124517-0097.5 h.p. motor (O.D.P.)* 230 volt onlyPart numbers shown in italics apply to tank mounted units and base mounted units.QT-7.5 Air Master50121M201, May 2001Quincy Compressor173501 Wismann Lane, Quincy IL 62305-3116
TYPICAL UNIT REPAIR PARTS LISTThe parts listed here are for standard QT-7.5 (up to 175 p.s.i.) units and may or may not be applicable to custom built units. Check withyour local authorized AirMaster Distributor for parts that can be used for custom built units. Make sure the components you order are ratedwithin the safe operating limits of your system. If you are doubtful about which components to order, contact your local AirMasterDistributor.(QT-7.5 vertical tank - electric motor)PartQty Number1111114 ft.211180 110945K0171117.5 H.P.110258B06111082889301115/230v, 1Ø* 127466J018PartNumberPartNumber120 110945K017Descriptiontank (200 p.s.i. max. working pressure)tank drain valveball valvepressure gaugepressure switch (135-175 p.s.i.)pressure relief valve (in tank; 200 p.s.i.)! discharge tube (3/4" copper tube to be formed by customer)tube fitting, nut with sleevecheck valverelief valve (in discharge line; 215 psi)belt guard assemblydrive beltmotor pulleymotor bushing200v, 3Ø8393230/460v, 3Ø124517-0097.5 h.p. motor (O.D.P.)! Pre-formed discharge tubes are available. Contact factory with model & tank size information.* 230 volt only.(QT-7.5 gasoline engine driven)PartQty Number1111112111113 ft.21111base 3701111089-215113708-1750114551-175PartNumbertank rtNumberDescriptiontank (200 p.s.i. maximum operating pressure)top platetank drain valveball valvepressure gaugepressure relief valve (in tank; 200 p.s.i.)drive beltengine pulleyengine pulley bushingbelt guard assemblythrottle control (bullwhip cable)Kohler engine group, 13 h.p. (includes exhaust system & throttle control)! discharge tube (3/4" copper tube to be formed by customer)tube fitting, nut with sleeverelief valve (in discharge line; 215 psi)check valvepilot (165-175 psi)discharge unloader valve! Pre-formed discharge tubes are available. Contact factory with model & tank size information.QT-7.5 Air Master50121M201, May 2001Quincy Compressor183501 Wismann Lane, Quincy IL 62305-3116
TYPICAL UNIT REPAIR PARTS LISTThe parts listed here are for standard QT-7.5 (up to 175 p.s.i.) units and may or may not be applicable to custom built units. Check withyour local authorized AirMaster Distributor for parts that can be used for custom built units. Make sure the components you order are ratedwithin the safe operating limits of your system. If you are doubtful about which components to order, contact your local AirMasterDistributor.(QT-7.5 diesel engine driven)PartQty Number1111112111112.5 ft.2111PartNumberbase 114080-001113708-175tank PartNumberDescriptiontank (200 p.s.i.)top platetank drain valveball valvepressure gaugepressure relief valve (200 p.s.i.)drive beltengine pulleyengine pulley bushingbelt guard assemblythrottle control! Yanmar engine group, 10 h.p. (includes throttle control)discharge tube (3/4" copper tube to be formed by customer)tube fitting, nut with sleevepressure relief valve (in discharge line; 215 p.s.i.)check valve (discharge line)pilot (165-175 p.s.i.)! Pre-formed discharge tubes are available. Contact factory with model & tank size information.QT-7.5 Air Master50121M201, May 2001Quincy Compressor193501 Wismann Lane, Quincy IL 62305-3116
Quincy Air Master Service isalways near. There areauthorized Quincy Air MasterDistributors located throughoutthe United States & Canada thatstock genuine Air Master parts &accessories for a wide range ofAir Master products.Quincy Air Master Servicespecialists are factory trained andwill help keep you in business.Call for Authorized Quincy AirMaster Service.See how Quincy Air Master Compressorscan work for you. Call 217.222.7700E-mail: airmaster@quincycompressor.com 2001 Quincy Compressor a BFGoodrich Company BusinessAll Rights Reserved. Litho in U.S.A.
Quincy Air Master Service is always near. There are authorized Quincy Air Master Distributors located throughout the United States & Canada that stock genuine Air Master parts & accessories for a wide range of Air Master products. Quincy Air Master Service specialists are factory trained and will help keep you in business. Call for Authorized .
