Graco 311338J User's Manual
Contents
1. 19 Models Includes ee mil Mix Module Tip Manifold Starter Flushing Kit Kit 297898 x Gun GX 8 Not Included 297860 Gun GX 8 Auto 295338 013 297192 201 24P633 x Gun GX 8 with manifold 24N996 297911 296980 CE 311338J Warnings Warnings The following warnings are for the setup use grounding maintenance and repair of this equip ment The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure specific risks When these symbols appear in the body of this manual refer back to these Warnings Product specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable 4 PERSONAL PROTECTIVE EQUIPMENT Yar You must wear appropriate protective equipment when operating servicing or when in the operating area of the equipment to help protect you from serious injury including eye injury inhalation of toxic fumes burns and hearing loss This equipment includes but is not limited to e Protective eyewear e Clothing and respirator as recommended by the fluid and solvent manufacturer e Gloves Hearing protection a TOXIC FLUID OR FUMES HAZARD AR Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin inhaled or swallowed e Read MSDS s to know the specific hazards of the fluids you are using e Store hazardous fluid in approved containers and2. 297841 202 7 in wide 1 4 Round Spray Pattern 295377 297914 295339 020 4 in diameter 1 0 098 diameter 018 diameter 295428 024 5 in diameter 1 4 Includes appropriate cleanout drills 311338J Technical Data Category Air Supply Maximum Operating Pressure Maximum Output Minimum Output Maximum sound pressure T Maximum sound power T Height Length Width Weight Mixing Wetted Parts Technical Data Data 100 125 psi 7 9 bars 3500 psi 24 MPa 240 bar 0 4 gallons min 1 52 liters min 0 1 gallons min 0 38 liters min 78 7 db A 100 psi 0 7 MPa 7 bar 85 7 db A 100 psi 0 7 MPa 7 bar 7 in 17 8 cm 7 5 in 19 cm 2 5 in 6 25 cm 3 5 Ibs 1 59 kg Internal impingement airless atomization sol vent free mechanically self cleaning Stainless Steel Carbon Steel HDPE Acetal Theoretical actual results will vary with operating conditions 1 Measured at typical operating conditions clean off valve on gun is a half turn open Sound pressure measured 3 feet 1 meter from equipment Sound power measured per ISO 94 16 2 311338J 41 Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use With the exception of any special extended or limited warranty published by Graco
3. 5 OPEN safety stop 21 Repair 6 To install mixing module hold down gun trigger and slide module over end of valving rod Make sure to align keypin with slot in gun block Keep gun trigger depressed and proceed to step 7 7 To install PCD hold gun trigger in and place PCD over mixing module If installing a fan tip position PCD according to which spray direction is needed vertical or hori zontal Keep gun trigger depressed and proceed to step 8 NOTE Parts must align properly or chemical flow from gun block ports will not enter mixing module when gun is triggered 8 Install PCD retainer a With gun trigger depressed thread PCD retainer in place by hand b Use 10 in adjustable wrench to care fully tighten PCD retainer until it is snug enough to ensure no leak will occur c Release gun trigger To avoid damage to module and gun block do not overtighten mixing module retainer 9 Install air cap and tighten by hand 10 Adjust valving rod see Valving Rod Adjustment page 14 22 Replace End Cap and Air Piston Assembly End Cap O Ring 8 Socket Head End Cap Safety Cap Screw Stop Assembly Retainin d Ring g Cylinder d Cup Seal r DES Piston O Ring Piston Piston Spring FIG 16 End Cap and Air Piston Assembly 1 Clean gun see Clean Spray Gun Proce dure on page 18 2 Disconnect air supply from gun 3 Use 5 16 in wrench to loosen
4. including solvent rags and gasoline e Do not plug or unplug power cords or turn power or light switches on or off when flammable fumes are present Ground all equipment in the work area See Grounding instructions Use only grounded hoses Hold gun firmly to side of grounded pail when triggering into pail If there is static sparking or you feel a shock stop operation immediately Do not use equipment until you identify and correct the problem e Keep a working fire extinguisher in the work area DE a Im e EQUIPMENT MISUSE HAZARD e Misuse can cause death or serious injury Do not operate the unit when fatigued or under the influence of drugs or alcohol Do not exceed the maximum working pressure or temperature rating of the lowest rated system component See Technical Data in all equipment manuals Use fluids and solvents that are compatible with equipment wetted parts See Technical Data in all equipment manuals Read fluid and solvent manufacturer s warnings For com plete information about your material request MSDS forms from distributor or retailer e Check equipment daily Repair or replace worn or damaged parts immediately with genuine Graco Gusmer replacement parts only e Do not alter or modify equipment e Use equipment only for its intended purpose Call your Graco Gusmer distributor for infor mation Route hoses and cables away from traffic areas sharp edges moving parts and hot s
5. 311338J Replace Trigger Valve O Rings 1 Clean gun see Clean Spray Gun Proce dure page 18 2 Perform Pressure Relief Procedure page 17 3 Disconnect air supply from gun Refer to Parts page 28 1 16 in Pipe Plug Spring 1 8 in lt Valve Pipe Nipple IK Spring Valve Trigger Mounting Spool Screw Valve Retainer Nut Trigger Lever FIG 18 Replace Trigger Valve O Ring 4 Use 6 in adjustable wrench and 6 in pliers to remove screw and locknut that hold trig ger lever in place Remove trigger lever 5 Use 3 8 in wrench to loosen and remove valve retainer nut 6 Remove valve spool and spring a Grab end of spool and pull out Spring will come out with spool Do not lose spring it belongs in hole at end of spool b Remove old rings 311338J 4 Optional 1 8 in Repair c Apply thin coat of Lubriplate grease to new rings and reinstall NOTE Follow steps 7 14 to replace rings on valve liner If rings do not need to be replaced proceed to step 15 7 Use 3 16 in hex key to remove 1 8 in rear internal plug This plug seals another air flow path in gun handle NOTE For guns configured with air inlet at rear of gun handle pipe nipple replaces pipe plug Remove pipe nipple 8 Use 5 32 in hex key to remove rear internal pipe plug under pipe plug 9 Use pin punch and hammer to gently tap spring seat until it and valve liner push out opp
6. SCREW mounting trigger RING retaining HANDLE gun CYLINDER air LINER valve SPOOL valve NUT retainer valve SEAT spring SPRING PISTON assembly CAP end NEEDLE adjust air KNOB gap PIN stop SPRING piston BRACKET assembly PACKING ring SCREW cap RING Qty SANA A N Aaa sch kh ch mk mk GA mk sch do A A sch sch A A sch AA AA da N LS O GX 8 Gun Kit 297832 202 Ref Part 201 297898 202 295383 203x296980 203a 203b 203c 203d 203e 203f 203g 203h 203k 204x297911 204a 204b 204c 204d 204e 204f 204g Not shown Description GUN BLOCK coupling KIT service includes 203a 203k SPRAYER solvent flush VALVE service air SCREW mounting block coupling VALVE manual NIPPLE JIC SCREW block coupling BLOCK service FITTING 3 8 in x 7 16 in HOSE 3 16 ID x 3 ft KIT starter includes 204a 204g PIN vise MODULE fan 013 TIP round 020 MODULE round 020 TIP round 024 TIP fan 201 TIP fan 202 201 Parts Qty i ll ld _ A hd sch sch N ch dl dd dodo 31 Parts GX 8P Spray Gun Final Assembly 297860 FIG 21 GX 8P Spray Gun Final Assembly 311338J 32 GX 8P Spray Gun Final Assembly 297860 116 123 124 125 126 127 128 129 130 131 Part 15B772 296128 295623 295624 295596 208536 191872 106560 295433 297680 297681 297682 297683 297684 295341 297861 297193 297686 2976
7. appropriate lubricant when reassem bling NOTE The amount of film formation and rate of crystallization varies depending on the blend of ISO the humidity and the temperature Important Two Component Material Information Foam Resins with 245 fa Blowing Agents Some foam blowing agents will froth at temper atures above 90 F 33 C when not under pressure especially if agitated To reduce frothing minimize preheating in a circulation system 311338J Important Two Component Material Information 311338J 7 Overall View Overall View Gun Block Mounting Screw Safety Stop Air Cap Air Cap Air Adjustment Valve Gun Block SJ Manual Valves Coupling Trigger Fic 1 GX 8P Overall View Block Centerline Components B Screen Screw TT O Ring Screen PA Jam Nut SE r Valving Rod Pattern Control o De Assembly Disc PCD Gun Block gt zz Ye Packing Nut Mixing a PCD Module Qa Rear Seal Retainer ema p ieee AS Screen Screw Screen Retainer 9 B Check Valve A Check Valve Air Cap Coupling Coupling Block Block Gasket Mounting Screw FIG 2 GX 8P Centerline Components 8 311338J Overall View Mixing Module Graco offers a variety of spray tip configura tions to meet most applications that spray fast reaction chemical systems at low outputs GX 8P spray tip components c
8. dispose of it according to applicable guidelines SKIN INJECTION HAZARD High pressure fluid from gun hose leaks or ruptured components will pierce skin This may look like just a cut but it is a serious injury that can result in amputation Get immediate surgical treatment Do not point gun at anyone or at any part of the body Do not put your hand over the spray tip Do not stop or deflect leaks with your hand body glove or rag Engage trigger lock when not spraying Follow Pressure Relief Procedure in this manual when you stop spraying and before cleaning checking or servicing equipment PRESSURIZED EQUIPMENT HAZARD Fluid from the gun dispense valve leaks or ruptured components can splash in the eyes or on skin and cause serious injury e Follow Pressure Relief Procedure in this manual when you stop spraying and before cleaning checking or servicing equipment e Tighten all fluid connections before operating the equipment e Check hoses tubes and couplings daily Replace worn or damaged parts immediately 311338J 3 Warnings FIRE AND EXPLOSION HAZARD Flammable fumes such as solvent and paint fumes in work area can ignite or explode To help prevent fire and explosion Use equipment only in well ventilated area e Eliminate all ignition sources such as pilot lights cigarettes portable electric lamps and plastic drop cloths potential static arc e Keep work area free of debris
9. lock VALVE control MANIFOLD air valve GASKET RING retaining CYLINDER air SPRING PISTON assembly CAP end NEEDLE air adjust KNOB gap PIN stop BRACKET BLOCK valve mount PLATE mounting gun PLATE cover manifold SPRING piston PACKING o ring SCREW cap O RING Qty SN DN A E mh sch kh kh ch mk mk mk mb sch mk mk sch sch sch sch sch DA DA NM sch N Parts 35 Parts Auto GX 8P Optional Parts Ref Part Description 1 297899 KIT auto GX 8 Gun 2 298752 WIRE 10 ft extension har ness 3 298753 WIRE 25 ft extension har ness 298754 WIRE 50 ft extension har ness 298611 ENCODER assembly 299083 CABLE VMU extension 25 ft 297730 CABLE encoder assembly 297741 CONTROL BOX TX50 pro cessor EN 0 N O O1 36 ch sch 311338J Parts Coupling Block Assembly 295383 Ref Part Description Qty 62 295662 Pipe plug flush seal 1 8 in 2 63 295888 B swivel fitting 1 64 295889 A swivel fitting 1 65 295693 Pipe plug flush seal 1 16 in 2 66 296970 Manual valve assembly 2 67 296215 Coupling block 1 311338J 37 Parts Coupling Block 297902 Ref Part 67 295662 70 296626 71 260810 38 Description PLUG pipe VALVE assembly manual Block coupling 311338J Coupling Block Assembly 24N996 Apply pipe sealant to all male threads prior to assembly Torque fittings to 120 130 in lb 14 15 Nem Ref 301 302 303 304
10. or 4 turns This relieves pres sure between seals and makes adjustment easier Valving Rod Assembly Packing Nut Jam Nut FIG 10 Valving Rod Adjustments 4 Use 3 8 in wrench on hex shaped valving rod shank and 1 2 in wrench on jam nut to loosen and back it away from valving rod by 3 or 4 full turns Then move valving rod toward gun cylinder Turn valving rod shank 2 or 3 full turns clockwise 5 Slowly turn valving rod counterclockwise to move it toward PCD until resistance is felt Valving rod tip should touch inside spheri cal surface of PCD 6 Carefully maintain 3 8 in wrench in position and tighten jam nut up against valving rod shank to lock adjustment into place 7 Retighten packing nut 8 Check rear safety stop by attempting to dis engage it If knob will not turn valving rod is adjusted too far forward Repeat steps 3 7 Make sure not to adjust valving rod past the point resistance is felt If safety stop dis engages proceed to step 9 9 Trigger gun with safety stop disengaged to confirm rear seal adjustment Make sure rod moves freely If not loosen packing nut slightly until it does Start to spray and check for chemical seepage from packing nut and retighten if necessary NOTE If valving rod required adjustment as part of initial mixing module and PCD installa tion on a new spray gun proceed to I
11. 06560 295433 297680 297681 297682 297683 297702 297684 295341 297193 297686 297687 295437 295338 297192 297705 297901 100030 311338J Description HOSE air 1 4 in x 23 in F x F GASKET block gasket VALVE check A VALVE check B PLUG coupler Coupler line air PACKING O ring SCREW mounting block coupling NUT seal rear RETAINER screen SCREW mounting block gun NUT jam HANDLE assembly RETAINER PCD ROD valving SCREEN gun block 100 mesh SCREW screen iso SCREW screen res PACKING seal rear MODULE fan TIP fan CAP air BLOCK gun Fitting Qty 1 sch sch ch sch sch y N N sch sch A sch ch sch dd sch ch Parts 29 Parts GX 8 Handle Assembly 297702 TAK VERS QEK amp 30 311338J GX 8 Handle Assembly 297702 Ref 72 73 74 75 Part 295435 295709 295662 295732 103337 106555 C02032 296627 295692 116624 295693 296971 108103 168518 295665 295671 296538 297689 16T691 295686 295687 295688 295689 295436 297691 296529 297693 296530 296526 295416 297694 114054 C20004 295685 311338J Description SEAL u cup SCREW cap socket head PLUG pipe SCREW cap sh 8 32 x 1 4 LG PACKING ring PACKING ring NUT SEAL u cup TRIGGER gun spray SCREW set socket head PLUG pipe SPRING PACKING ring PACKING ring FITTING nipple pipe
12. 3 Use 3 16 in hex key to install 1 8 in pipe plug in location previously occupied by 4 in pipe nipple 4 Use 6 in adjustable wrench to install pipe nipple in location previously occupied by 1 8 in pipe plug 311338J Mixing Module and PCD Installation 1 Loosen air cap by hand and remove 2 Install mixing module a b Disconnect gun from coupling block Connect air supply to gun Set safety stop to OPEN Hold down trigger and place module over tip of valving rod Align keying pin with slot in gun block and keep gun trigger held down 3 Install PCD a C Hold down gun trigger and thread PCD retainer in place by hand Use 10 in adjustable wrench to care fully tighten PCD retainer until snug enough to ensure no leak will occur Release gun trigger 4 Install air cap and tighten by hand 5 Adjust valving rod see Valving Rod Adjustment page 14 311338J Operation Basics Operation Basics Valving Rod Adjustment Valving rod should not require adjustment if it was shipped from factory with mixing module and PCD installed Valving rod should only re quire adjustment when Piston rod assembly ring is changed Valving rod is changed e PCD is installed or changed e Mixing module is installed or changed To adjust valving rod 1 Perform Clean Spray Gun Procedure see page 18 2 Connect air supply to gun 3 Use 5 16 in open end wrench to loosen packing nut 3
13. 305 306 307 308 309 Part 296215 295430 104071 112307 C20895 117506 122722 122963 117455 311338J 306 L NT ti19795a Description BLOCK coupling ss VALVE manual PLUG pipe FITTING street elbow FITTING bushing 1 4 x 1 8 FITTING swivel 1 4 npt x 6 jic ADAPTER jic06x1 4npt mm ms 6k ADAPTER swvl jic05x1 4npt fm ms 6 FITTING nipple 1 4 npt x 5 jic Qty lt A D ND MI sch 305 304 Parts 39 Set up Chart for GX 8P Modules Set up Chart for GX 8P Modules Pres Pattern Resin sure Output XDia Module Part Port No Iso Port No psi Ibs min inches No Size Orifices Size Orifices Tip Round Spray Pattern 2500 1 0 4 0 295377 013 1 013 1 295339 020 2500 1 4 5 0 295377 013 1 013 1 295428 024 Fan Spray Pattern 2500 1 0 6 295338 013 1 013 1 297192 201 2500 1 4 7 295338 013 1 013 1 297841 202 At 18 24 in above substrate GX 8P Model Specifications Module Tip Data for Chemical Sprayed at 2500 PSI XModule Kit Cleanout Drill Tip Fan Spray Pattern Pattern Output Ibs min 295338 098 diameter 297914 013 diameter 297192 201 6 in wide 1 0 Actual results may vary due to chemical sys tem characteristics temperature pressure and ratio Tool Kits 297966 GX 8P Tool Kit 40
14. 87 295437 297705 112307 297901 297192 295338 311338J Description HOSE air 1 4 X 23 in F X F GASKET block gasket VALVE check A VALVE check B PLUG coupler COUPLER line air FITTING pipe hex PACKING o ring SCREW mounting block coupling NUT seal rear RETAINER screen SCREW mounting block gun NUT jam RETAINER pod ROD valving CYLINDER GX 8P auto SCREEN gun block 100 mesh SCREW screen iso SCREW screen res PACKING seal rear AIR cap ELBOW street BLOCK gun TIP fan MODULE fan Qty 1 2 1 1 1 1 1 1 1 N py Z gt h dl dd dd sch Parts 33 Parts GX 8P Auto Cylinder Assembly 297861 9 N 7 FIG 22 GX 8P Auto Cylinder Assembly 311338J 34 GX 8P Auto Cylinder 297861 Ref Part 26 27 28 295435 295709 295732 104376 297743 C20988 103337 297253 104705 296627 116624 297862 108103 168518 297863 297975 297881 297882 297883 296538 297690 295436 297691 296529 297884 296530 296526 297885 297886 297888 297889 295416 114054 C20004 295685 311338J Description SEAL u cup SCREW cap socket head SCREW cap sh 8 32 X 1 4 LG SCREW cap sch TIE cable 6 PACKING o ring PACKING o ring WASHER helical 188 in diameter SCREW cap sch SEAL u cup SCREW set socket head SCREW cap flat head PACKING o ring PACKING o ring SCREW cap socket head WASHER
15. Graco will for a period of twelve months from the date of sale repair or replace any part of the equipment determined by Graco to be defective This warranty applies only when the equipment is installed operated and maintained in accordance with Graco s written recommendations This warranty does not cover and Graco shall not be liable for general wear and tear or any malfunction damage or wear caused by faulty installation misapplication abrasion corrosion inadequate or improper maintenance negligence accident tampering or substitution of non Graco component parts Nor shall Graco be liable for malfunction damage or wear caused by the incompatibility of Graco equipment with structures accessories equipment or materials not supplied by Graco or the improper design manufacture installation operation or maintenance of structures accessories equipment or materials not supplied by Graco This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect If the claimed defect is verified Graco will repair or replace free of charge any defective parts The equipment will be returned to the original purchaser transportation prepaid If inspection of the equipment does not disclose any defect in material or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation
16. Operation Parts Service Repair G g GRACO GX 8P Spray Gun 311338J EN For use with non flammable polyurethane foams two component coating systems polyureas and some two component epoxy systems For professional use only Not for use in explosive atmospheres 3500 psi 24 MPa 240 bar Maximum Working Pressure 125 psi 90 KPa 9 bar Maximum Air Working Pressure Important Safety Instructions D Read all warnings and instructions in this manual Save these instructions GX 8P Auto Model 297860 GX 8 Model 297898 PROVEN QUALITY LEADING TECHNOLOGY Models Contents Models e EE xa ka a kalana kya ea nan 2 R pal xu aa laga Sel eee a ada enam 20 Warnings Med kk kk kk kk kk kk kk kk kk kk kk kk tte 3 Service Screen Screw 20 Important Two Component Material Information 5 Remove Check Valve 20 Isocyanate Conditions 5 Remove Centerline Components 21 Material Self ignition 5 Install Centerline Components 21 Keep Components A and B R Separate 5 Replace End Cap and Air Piston Assembly 22 Moisture Sensitivity of Isocyanates 5 Replace Trigger Valve O Rings 25 Foam Resins with 245 fa Blowing Agents 6 Clean Mixing Module 26 Overall View 8 Troubleshooting 27 Centerline Com
17. THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE Graco s sole obligation and buyer s sole remedy for any breach of warranty shall be as set forth above The buyer agrees that no other remedy including but not limited to incidental or consequential damages for lost profits lost sales injury to person or property or any other incidental or consequential loss shall be available Any action for breach of warranty must be brought within two 2 years of the date of sale GRACO MAKES NO WARRANTY AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES EQUIPMENT MATERIALS OR COMPONENTS SOLD BUT NOT MANUFACTURED BY GRACO These items sold but not manufactured by Graco such as electric motors switches hose etc are subject to the warranty if any of their manufacturer Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties In no event will Graco be liable for indirect incidental special or consequential damages resulting from Graco supplying equipment hereunder or the furnishing performance or use of any products or other goods sold hereto whether due to a breach of contract breach of warranty the negligence of Graco or otherwise FOR GRACO CANADA CUSTOMERS The Parties
18. acknowledge that they have required that the present document as well as all documents notices and legal proceedings entered into given or instituted pursuant hereto or relating directly or indirectly hereto be drawn up in English Les parties reconnaissent avoir convenu que la r daction du pr sente document sera en Anglais ainsi que tous documents avis et proc dures judiciaires ex cut s donn s ou intent s la suite de ou en rapport directement ou indirectement avec les proc dures concern es Graco Information For the latest information about Graco products visit www graco com TO PLACE AN ORDER contact your Graco distributor or call to identify the nearest distributor Phone 612 623 6921 or Toll Free 1 800 328 0211 Fax 612 378 3505 All written and visual data contained in this document reflects the latest product information available at the time of publication Graco reserves the right to make changes at any time without notice For patent information see www graco com patents Original instructions This manual contains English MM 311338 Graco Headquarters Minneapolis International Offices Belgium China Japan Korea GRACO INC AND SUBSIDIARIES P O BOX 1441 MINNEAPOLIS MN 55440 1441 e USA Copyright 2006 Graco Inc All Graco manufacturing locations are registered to ISO 9001 www graco com Revised October 2012
19. aged Air Hose Connection NA e Connect Air Hoses Pull back sleeve of female fitting insert male fitting and slide sleeve forward to secure con nection Disconnect Air Hoses Pull back sleeve of female fitting and pull out male fitting 311338J Fic 6 Disconnect Air Hose Coupling Block Chemical hoses are joined to gun block by a coupling block to ease installation and removal of gun Manual Valves Two manual valves located on coupling block control flow of each chemical component to gun Never open manual valve unless coupling block is secured to gun or unless you point gun into waste container NOTE Triggering gun with manual valves closed may cause crossover if any residual chemical remains in gun ports Open Manual Valves Use 5 16 in nut driver to turn manual valve counterclockwise approximately three full turns Coupling Block Manual Valves lt 8 FIG 7 Open Manual Valves 311338J Operation Basics Close Manual Valves Use 5 16 in nut driver to turn manual valve fully clockwise To prevent accidental gun operation always set safety stop to CLOSED close both man ual valves and disconnect air supply Installation and Removal To prevent release of pressurized chemicals close both manual valves before coupling block is removed I
20. assembly Use gun block mounting screw screw that holds gun block to bracket to aid in removal of piston b Look into rear of air cylinder and thread mounting screw into center hole of pis ton at least 4 full turns c Use 6 in pliers to grab mounting screw and pull piston rod assembly out of air cylinder d Inspect ring and replace if damaged Apply light coat of Lubriplate grease and install new ring 10 Inspect air cylinder cup seal If air escapes 1 around piston rod during operation remove and replace cup seal located in front of air cylinder Lubricate new cup seal with Lubri plate grease and install it Make sure cup faces toward rear of cylinder Insert piston and rod assembly into air cyl inder Be careful not to damage cup seal in front face of air cylinder as rod passed though Remove gun block mounting screw from piston 23 Repair 12 Disassemble safety stop mechanism a Use 5 64 in hex key to remove two set screws from knob b Slide knob off stop pin and retain stop pin spring c Pull shaft out of end cap FIG 17 13 Remove cup seal from end cap and inspect for damage Remove if damaged Apply light coat of Lubriplate grease and install new end cap ring O ring End Cap Cup Seal Set Screws Stop Pin FIG 17 End Cap Safety Stop Assembly 14 Reassemble safety stop mechanism a Insert stop pin into end cap hole b Slide spring and knob onto stop pin
21. c Use 5 64 in hex key to reinstall two set screws into knob Ensure knob is secure 15 Reinstall end cap safety assembly and pis ton spring a Insert piston spring and align over raised center of piston b Line up raised center of end cap with spring and insert end cap into air cylin der c Press end cap until it moves past retain ing ring groove in cylinder 24 d Maintain pressure on end cap Ensure groove remains visible 16 Use retaining ring 45 pliers to reinstall retaining ring into groove Retaining ring must seat completely into groove to secure end cap in place when air cylinder is pressurized Keep clear of cap when air pressure is applied or gun is trig gered after reassembly 17 Use 9 64 in ball point hex key to install and tighten socket head cap screw which holds air cylinder to handle 18 Reinstall valving rod and jam nut a Thread jam nut as far as it will go onto threaded end of piston shaft b Ensure hex end of nut faces rear c Thread valving rod as far onto threaded portion of piston rod as possible 19 Thread packing nut into gun block by hand but do not tighten 20 Install gun block a Ensure ring is in place in top of gun block b Carefully slide gun block onto valving rod toward air cylinder c Use 5 16 in nut driver to install gun block onto gun block mounting bracket 21 Adjust valving rod see Valving Rod Adjustment on page 14
22. e Maintenance proce dures page 18 19 Repair Repair Shutdown proportioner and allow chemicals to cool before servicing gun Service Screen Screw To avoid static sparking that may result in fire or explosion ensure all equipment in flushing procedure is grounded Do not flush on or near foamed or coated surfaces 1 Flush gun see Clean Spray Gun Proce dure page 18 2 Unthread screen screw from gun block 3 Remove screen screw retainer before removing screen 4 Remove screen from screen screw Soak in gun cleaner or replace if clogged or dirty 5 Clean screen screw cavity If any particles are visible clean with clean out drills and flush with gun cleaner NOTE Any material left in cavity on down stream side of screen will clog mixing module 6 Inspect screen screw seal for damage Replace if necessary 7 Reinstall screen screw in gun block Ensure it is tight 8 Flush gun with mixing module removed 20 Remove Check Valve To avoid static sparking that may result in fire or explosion ensure all equipment in flushing procedure is grounded Do not flush on or near foamed or coated surfaces Check valves are located in cavities of gun block under each coupling block gasket Check valves are triangular pieces with a spring insert ed in one end The isocyanate valve is notched for easy identification To remove chec
23. ent to avoid static sparking that may result in fire or explosion 1 Connect air supply to gun 2 Adjust air cap adjustment valve Turn knob counterclockwise to open valve and clock wise to close valve 3 Open both manual valves 4 OPEN safety stop 5 Test spray on a disposable surface and evaluate Daily Shutdown Bew A NOTE Follow daily shutdown procedure when gun is out of service for any length of time or for mid or end of day service See Clean Spray Gun Procedure page 18 1 CLOSE safety stop 2 Close both manual valves 3 Disconnect air supply from gun 4 Shut down proportioning unit as required 5 Clean as required see Clean Spray Gun Procedure page 18 NOTE Disassembling gun for daily cleaning is not recommended if gun has been operating properly However if gun is removed from cou pling block it must be flushed and cleaned thoroughly 311338J Pressure Relief Procedure YES Nas Relieve pressure before cleaning or repairing gun 1 Close both manual valves Manual Valves Fic 11 Close Manual Valves 2 OPEN safety stop 3 Trigger gun onto cardboard or into waste container to relieve pressure FIG 12 Trigger Gun 311338J Pressure Relief Procedure 4 Release gun trigger CLOSE safety stop and close manual valves If fluid in hose and proportioner is still under pressu
24. er 5 Pressurize service kit container up to 100 psi DO NOT EXCEED 100 psi 0 7 MPa 7 bar 6 Clean gun a Set safety stop to OPEN b Open either manual valve on service block c Trigger gun and gun service kit simulta neously with gun aimed into waste con tainer d Release both triggers and close manual valves on service block e Repeat procedure for other side of gun f After initial cleaning remove air cap PCD retainer and PCD Flush a second time to ensure thorough cleaning 7 CLOSE safety stop 8 Disconnect air supply from gun 9 Remove service block of gun service kit from gun 10 Clean screens check valves and screen screw see Service Screen Screw page 20 NOTE Inspect air cap PCD mixing module and gun block for build up of material and clean as required Do not use metal cleaning devices to clean plastic components 311338J Maintenance Flush Gun To avoid static sparking that may result in fire or explosion ensure all equipment in flushing procedure is grounded Do not flush on or near foamed or coated surfaces 1 CLOSE safety stop 2 Close both manual valves 3 Loosen B Screen screw and then remove by hand 4 Use flush can to thoroughly flush screen screw and screen screw cavity 5 Loosen A Screen screw and then remove by hand 6 Use flush can to thoroughly flush screen screw and screen screw cavity 7 Service gun se
25. jects or metal tools to remove mixing module 8 Disconnect air supply from gun 9 Use 5 16 in wrench to loosen packing nut 3 or 4 turns 10 Remove gun block a Use 5 16 in nut driver to remove gun block retaining screw b Slide gun block away from valving rod and air cylinder If dried chemical is built up on gun block remove dried chemi cals to make removal easier 311338J Repair 11 Remove and clean check valves see Remove Check Valve page 20 12 Remove valving rod a Use 3 8 in wrench on hex shaped valv ing rod shank and a 1 2 in wrench on jam nut to loosen it and back it away from valving rod shank by 3 or 4 full turns b Unthread valving rod from piston shaft and remove 13 Clean all components thoroughly before reassembly 14 Inspect gun block to ensure proper opera tion of spray gun Install Centerline Components Before installation ensure all gun components are clean and dry Lubricate all moving parts and threads 1 To install valving rod thread jam nut as far back on piston shaft as possible Screw shank end of valving rod onto threaded end of piston rod 2 Install rear seal and packing nut if removed Thread packing nut into gun block by hand but do not tighten 3 To install gun block carefully slide gun block onto valving rod towards air cylinder Use 5 16 in nut driver to install gun block onto gun block mounting bracket 4 Connect air supply to gun
26. k valve 1 Clean gun see Clean Spray Gun Proce dure page 18 2 Use check valve seal removal cleaning tool to remove gaskets from recesses in cou pling block Inspect gaskets for damage and replace if necessary 3 Remove check valves If valve does not come out easily insert machined end of removal cleaning tool over valve and rotate it while extracting valve 4 Clean valves and springs with gun cleaner Inspect for damage and replace if neces sary 5 Inspect each check valve cavity Use clean ing tool to remove any visible particles Use gun cleaner to flush thoroughly 6 Insert each check valve into its cavity spring end first Ensure check valve is ori ented correctly Isocyanate valve is notched for easy identification 7 Install coupling block gaskets 311338J Remove Centerline Components Refer to page 8 for diagrams of centerline components for all gun models 1 Flush gun see Clean Spray Gun Proce dure page 18 2 Remove air cap loosen by hand 3 Use 10 in adjustable wrench to remove PCD 4 Connect air supply to gun 5 Lift PCD off nose of gun block and remove NOTE To remove PCD that is stuck set safety stop to OPEN depress and release gun trigger to unseat it CLOSE safety stop 6 Remove mixing module retainer 7 OPEN safety stop Depress and release gun trigger to unseat it Remove mixing module off end of valving rod CLOSE safety stop Do not use sharp ob
27. ner OPEN safety stop Depress and release gun trigger to unseat it Remove mixing module from end of valving rod CLOSE safety stop 9 Inspect valving rod for damage and replace as required Use cloth soaked in gun cleaner or steel wool to clean and remove buildup of mixed material from rod NOTE If valving rod is replaced reset forward stop 10 Cleanmixing module NOTE Ensure cleanout tool size matches module size used Insert cleanout tool into pin vise d Use cleanout tool to clean module ports Make sure not to insert tool too far it will damage inside bore of module Use cotton swab soaked in gun cleaner to clean bore of module FIG 20 Clean Module Ports 311338J Troubleshooting NARE Follow Pressure Relief Procedure page 17 before checking or repairing gun To prevent cross contamination of the equip ment s wetted parts never interchange com ponent A isocyanate and component B resin parts The gun is shipped with the A side on the left The gun block and the screen screw are marked Troubleshooting Use the following table to check all possible problems and causes before disassembling gun See Maintenance on page 18 for refer enced procedures Problem Cause Solution Gun does not fully actuate Safety lock engaged Disengage piston safety lock Air not vented on open close ports Vent open air port when closing vent clo
28. nitial Set Up page 15 311338J Initial Set Up ne2 1 Remove coupling block from gun 2 Use two 6 in adjustable wrenches to install female quick disconnect fitting onto air sup ply hose bundled with chemical supply hoses 3 Use two 6 in adjustable wrenches to con nect A isocyanate hose red taped to notched fitting on coupling block Connect B resin hose blue taped to fitting without notches on coupling block Close both manual valves E 5 Pressurize A and B chemical hoses and check for leaks see Proportioner manual as needed 311338J Operation Basics 6 Bleed air from chemical hoses a Hold coupling block with exit ports pointed into waste container b Use 5 16 in nut driver to open each manual valve this allows any trapped air to escape Bleed each side fora short time until chemicals leaving hoses are free of air c Close both manual valves 7 Use cloth soaked in gun cleaner to clean coupling block and mating surfaces Do not apply grease to mating surfaces of coupling block to avoid accumulation of dirt and other contaminants 8 CLOSE safety stop 9 Install coupling block to gun 10 Proceed with daily start up and shutdown procedures as required Operation Basics Daily Start up Wea eld Ensure gun is attached to coupling block and air hose Ensure proportioning unit is at desired temperature and pressure Properly ground equipm
29. nstall Coupling Block 1 Replace nicked damaged or worn cou pling block gaskets 2 Ensure A isocyanate and B resin check valves are inserted into their proper recesses in gun block Isocyanate valve is notched for easy identification 11 Operation Basics 3 Fit coupling block into gun block and insert coupling block mounting screw Use 5 16 in nut driver to tighten to gun block Coupling Block Gaskets Coupling Screw Mounting Screw FIG 8 Install Coupling Block Remove Coupling Block 1 CLOSE safety stop 2 Disconnect air hose 3 Close both manual valves 4 Remove coupling block mounting screw 5 Separate coupling block from gun 6 Wipe mating surfaces of gun block and coupling block to remove residual chemi cals 7 Cover exposed openings with grease NOTE To avoid accidental gun operation ensure coupling block manual valves are closed before attempting to service gun or any time gun is not in use Air Inlet Configuration There are two configurations for the air inlet In the standard configuration the air inlet is at base of handle In the alternate configuration the air inlet is at rear of gun Pipe Plug Optional Pipe Plug Pipe Nipple FIG 9 Air Inlet Configuration To change to alternate configuration 1 Use 6 in adjustable wrench to remove 4 in pipe nipple from base of gun 2 Use 3 16 in hex key to remove 1 8 in pipe plug from rear of gun
30. onsist of a Pat tern Control Disc PCD and a Mixing Module Figure 3 Tip components are available in a range of sizes in both round and fan spray pat terns Please contact your authorized Graco distributor to help you determine the best con figurations for your specific application Valving Rod Assembly Fan Spray aes Pattern we Mixing O S Module Round e Pattern Patt Control SE Disc PCD Fic 3 Mixing Module amp PCD 311338J 9 Operation Basics Operation Basics EE To prevent accidental gun operation always disconnect air supply before servicing gun or anytime gun is not in use Grounding On Check your local electrical code and propor tioner manual for detailed grounding instruc tions Ground spray gun through connection to Graco approved grounded fluid supply hose Safety Position GX 8P guns have a two position safety stop When engaged it prevents accidental trigger ing of gun during servicing or down time When disengaged it allows gun to dispense Engage Safety Stop To engage safety stop push in and turn safety stop clockwise to place gun in CLOSED safety position A Engage the Safety Stop w woe FIG 4 Safety Stop Engaged Disengage Safety Stop To disengage safety stop push in and turn safety stop counterclockwise to place gun in OPEN position Disengage the Safety Stop e RAN FIG 5 Safety Stop Diseng
31. osite end of hole 10 Remove rings on liner Apply thin coat of Lubriplate grease to new rings and install 11 Clean valve hole Remove any dirt and debris Apply thin coat of Lubriplate grease to inside of valve hole 12 Slide spring seat into gun handle air valve hole tapered end first until it bottoms out 13 Push valve liner in as far as it will go Install valve retainer nut it will align valve liner and spool to their proper depth 14 Use 5 32 in hex key to screw 1 16 in pipe plug back into place Apply think coat of pipe thread sealant to threads prior to insertion to help prevent air leaks 15 Apply small amount of pipe thread sealant to 1 8 in plug threads Screw pipe plug in place 16 Insert valve spool into valve liner with valve spool spring still in place Screw in valve retainer nut tighten until snug 25 Repair 17 Use screw and locknut to reinstall trigger lever Clean Mixing Module 1 Flush gun see Clean Spray Gun Proce dure page 18 Connect air supply to gun OPEN safety stop Remove air cap by hand FIG 19 Unthread Cap from PCD Body 4 6 Trigger gun and hold it to relieve pressure on PCD retainer Turn PCD retainer counterclockwise and remove Remove PCD from mixing module retainer NOTE To remove PCD that is stuck set safety stop to OPEN depress and release gun trigger to unseat it CLOSE safety stop 7 8 26 Remove mixing module retai
32. packing nut 3 or 4 turns remove nut completely if rear seal needs to be replaced 4 Remove gun block a Use 5 16 in nut driver to remove gun block mounting screw b Carefully slide gun block away from valving rod and air cylinder If dried chemical has built up on gun block remove dried chemical to make removal easier c Remove valving rod and jam nut see Remove Check Valve page 20 311338J d Use 3 8 in wrench on hex shaped valv ing rod shank and 1 2 in wrench on jam nut e Loosen jam nut and back it away from valving rod shank by 3 or 4 full turns f Unthread valving rod and jam nut from piston shaft 5 OPEN safety stop 6 Use 9 64 in ball point hex key to remove socket head cap screw that holds air cylin der to handle FIG 16 7 Use retaining ring 45 pliers to remove retaining ring that holds end cap in place inside air cylinder 8 Remove end cap safety stop assembly and piston spring a Pull safety stop and attached end cap out of air cylinder b Remove piston spring located inside cylinder Be sure to retain spring for reinstallation NOTE Force will be required to remove end cap because ring is tightly compressed 9 Inspect end cap ring Replace if damaged Apply light coating of Lubriplate grease and install new end cap ring NOTE Skip steps 11 13 and go to step 14 if only end cap ring and cup seal need to be replaced 311338J Repair a Remove piston rod
33. ponents 8 Parts as ku ee te ta ALAN Bi sek Ae nara eee an 28 Mixing Module 9 GX 8 Gun Final Assembly 297898 28 Operation Basics 10 GX 8 Handle Assembly 297702 30 Grounding 10 GX 8P Spray Gun Final Assembly 297860 32 Safety Position 10 GX 8P Auto Cylinder Assembly 297861 34 Air Hose Connection anaua 10 Auto GX 8P Optional Parts 36 Coupling Block 11 Coupling Block Assembly 295383 37 Air Inlet Configuration 12 Coupling Block 297902 38 Mixing Module and PCD Installation 13 Coupling Block Assembly 24N996 39 Valving Rod Adjustment 14 Set up Chart for GX 8P Modules 40 Initial Set Up 15 GX 8P Model Specifications 40 Daily Start up 16 TOOL RIS yn cath eh aa Sd naa nan 40 Daily Shutdown 16 Technical Data 41 Pressure Relief Procedure 17 Graco Standard Warranty 42 Maintenance 18 Graco Information 42 Gun Service Kits 18 Clean Spray Gun Procedure 18 Flush Gun
34. re follow Pressure Relief Procedure in proportioner manual To relieve pressure in hose after gun is removed place fluid manifold over containers facing away from you Very carefully open fluid valves FIG 13 Under high pressure fluid will spray sideways from fluid ports FIG 13 Open Manual Valves Maintenance Maintenance Gun Service Kits Use either 1 Quart Gun Service Kit 296980 or 3 Gallon Gun Service Kit 296981 to per form daily flushing of spray gun without disas sembly Fic 14 1 Quart Gun Service Kit For more information about 1 Quart Gun Ser vice Kit see Manual 311340 Fic 15 3 Gallon Gun Service Kit For more information about 3 Gallon Gun Ser vice Kit see Manual 311341 Clean Spray Gun Procedure Wea Aw To avoid static sparking that may result in fire or explosion ensure all equipment in cleaning procedure is grounded Do not clean on or near foamed or coated surfaces or any other flammable surfaces or objects Thoroughly flush gun block with gun cleaner before removing valving rod or mixing compo nents from gun block Also allow chemicals in spray gun to cool before cleaning This procedure makes use of the 1 Quart or 3 Gallon Gun Service Kit 1 CLOSE safety stop 2 Close both manual valves 3 Remove gun from coupling block 311338J 4 Attach service block of gun service kit to spray gun and then tighten using 5 16 in nut driv
35. rial Self ignition Some materials may become self igniting if applied too thick Read material manufacturer s warnings and material MSDS Keep Components A and B R Separate NS Cross contamination can result in cured material in fluid lines which could cause serious injury or damage equipment To prevent cross contamina tion Never interchange component A and compo nent B R wetted parts e Never use solvent on one side if it has been contaminated from the other side 311338J Moisture Sensitivity of Isocyanates Exposure to moisture such as humidity will cause ISO to partially cure forming small hard abrasive crystals which become sus pended in the fluid Eventually a film will form on the surface and the ISO will begin to gel increasing in viscosity NOTICE Partially cured ISO will reduce performance and the life of all wetted parts Always use a sealed container with a desiccant dryer in the vent or a nitrogen atmosphere Never store ISO in an open container Keep the ISO pump wet cup or reservoir if installed filled with appropriate lubri cant The lubricant creates a barrier between the ISO and the atmosphere Use only moisture proof hoses compati ble with ISO e Never use reclaimed solvents which may contain moisture Always keep sol vent containers closed when not in use Always lubricate threaded parts with an
36. se air port when opening Loss of air Check air source Fluid does not pour when gun is Closed manual valves Open valves fully actuated Plugged orifice ports Clean orifice ports Plugged check valves Clean check valves Safety lock engaged Disengage piston safety lock Gun actuates slowly Loss of air pressure Check air source Damaged piston o rings Replace air piston o rings rod Gun delays then actuates abruptly Cured material around the purge Inspect purge rod mix module and orifices Replace if necessary Gun does not actuate Air supply to gun is shut off Open air supply Foam build up around front tip Clean off front tip Pressure imbalance Plugged orifice ports Clean orifice ports Plugged check valves Clean check valves Plugged fluid screens Clean screens housing Fluid does not shut off when fluid Damaged fluid valves Replace valves are closed Leak between air cylinder and fluid Damaged o ring Replace Material leaking out weep ports in fluid housing near air cylinder Mix module and rear seal worn Inspect and replace mix module and rear seal clean fluid housing 311338J 27 Parts Parts GX 8 Gun Final Assembly 297898 28 311338J GX 8 Gun Final Assembly 297898 Ref Part 1 O O O1 gt N 15B772 296128 295623 295624 295596 208536 1
37. ur faces Do not kink or over bend hoses or use hoses to pull equipment e Keep children and animals away from work area e Comply with all applicable safety regulations PRESSURIZED ALUMINUM PARTS HAZARD A Do not use 1 1 1 trichloroethane methylene chloride other halogenated hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment Such use can cause serious chemical reaction and equipment rupture and result in death serious injury and prop erty damage 4 311338J Important Two Component Material Information Important Two Component Material Information Isocyanates ISO are catalysts used in two component materials Isocyanate Conditions 11 NA Spraying or dispensing materials containing iso cyanates creates potentially harmful mists vapors and atomized particulates Read material manufacturers warnings and material MSDS to know specific hazards and precautions related to isocyanates Prevent inhalation of isocyanate mists vapors and atomized particulates by providing sufficient ventilation in the work area If sufficient ventila tion is not available a supplied air respirator is required for everyone in the work area To prevent contact with isocyanates appropriate personal protective equipment including chemi cally impermeable gloves boots aprons and goggles is also required for everyone in the work area Mate
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