Graco D, Operation, Parts, Service And Repair

Page 1: ...flammable polyurethane foams For professional use only Not for use in explosive atmospheres See page 2 for model information 1000 psi 7 MPa 70 bar Maximum Working Pressure Important Safety Instructions Read all warnings and instructions in this manual Save these instructions ENG ...

Page 2: ... Relief Procedure 13 Spray Pattern Adjustment 14 Maintenance 17 Gun Service Kits 17 Clean Spray Gun Procedure 18 Repair 19 Filter Screen Removal and Service 19 Clean Injection Slots 20 Valving Rod Adjustment 21 Centerline Component Removal 22 Centerline Component Installation 24 Parts 26 Model D Spray Gun Assembly 26 Air Cylinder Assembly 30 Coupling Block Assembly 31 Notes 32 Technical Data 33 Gr...

Page 3: ...g and respirator as recommended by the fluid and solvent manufacturer Gloves Hearing protection TOXIC FLUID OR FUMES HAZARD Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin inhaled or swallowed Read MSDS s to know the specific hazards of the fluids you are using Store hazardous fluid in approved containers and dispose of it according to applicable guidelin...

Page 4: ...ng 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 Check equipment daily Repair or replace worn or damaged par...

Page 5: ...FIG 1 Major Components Spring Retainer Case Valving Rod Closure Spring Valving Rod Positioner Valving Rod Adjustment Screw Valving Rod Stop Bar Valving Rod Piston Rod Trigger Air Cap Adjustment Valve Gun Block Coupling Block Coupling Block Mounting Screw ...

Page 6: ...line Components Coupling Block Gaskets Air Cap Mixing Chamber Case Snap Ring Screen Seal A Iso Check Valve Screen Screw Gun Block Mounting Screw O Ring Closure Screw Valving Rod Assembly Felt Wiper Retainer Gun Block R Resin Check Valve Screen Mounting Screw ...

Page 7: ...materials containing isocyanates creates potentially harmful mists vapors and atomized particulates Read material manufacturer s warnings and material MSDS to know specific hazards and precautions related to isocyanates Prevent inhalation of isocyanate mists vapors and atomized particulates by provid ing sufficient ventilation in the work area If sufficient ventilation is not available a sup plied...

Page 8: ... Remove coupling block mounting screw FIG 3 4 Separate coupling block from gun Do not lose gaskets 5 Use gun cleaner to wipe clean mating sur face of gun block and coupling block Cover exposed opening with grease Triggering gun with manual valves closed may cause crossover if gun ports contain residual chemical Never open manual valves unless coupling block is secured to gun or exit port is direct...

Page 9: ...rew Use to regulate amount of valving rod travel when gun trigger is depressed with air supply connected Turn clockwise to decrease travel and counterclockwise to increase travel 1 Use 5 64 in hex key wrench to loosen fric tion lock 2 Turn adjustment screw as required and tighten friction lock until screw no longer easily turns by hand 3 Check friction lock periodically and tighten as required to ...

Page 10: ...od To OPEN valve turn knob approximately 1 8 turn counterclockwise To CLOSE valve turn knob fully clockwise FIG 7 Air Valve Adjustment Felt Wiper Adjust Felt Wiper 1 Use 5 16 in open end wrench to loosen retainer slightly 2 Slowly tighten it by hand until it seats against rear packings in mixing chamber 3 Use 5 16 in open end wrench to tighten retainer another half turn FIG 8 Felt Wiper Clean Felt...

Page 11: ...upling block Then con nect R resin hose blue taped to fitting without notches on coupling block 6 Close both manual valves 7 Pressurize the A and R chemical hoses and check for leaks See Proportioning Unit manual 8 Bleed air from chemical hoses a Hold coupling block with exit ports pointed into disposable container b Open each manual valve to allow trapped air to escape Bleed each side until chemi...

Page 12: ...equired Ensure gun is attached to coupling block and air hose and the proportioning unit is at desired temperature and pressure CAUTION Sluggish valving rod action may result in valving rod sticking in open position when fluid pressure is applied Always have a 5 16 in nut driver available to quickly close manual valves on coupling block Do not exceed 1000 psi 7 MPa 70 bar maximum fluid working pre...

Page 13: ...upling block fol low Clean Spray Gun Procedure page 18 Relieve pressure before cleaning or repairing gun If fluid in hose and proportioner is still under pressure 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 Under high pressure fluid will spray side...

Page 14: ...target while simultaneously with drawing valving rod adjustment screw from retainer case by 1 4 turn incre ments in counterclockwise direction c Point of valving is reached when chemi cal stream mists as shown in FIG 11 FIG 11 Point of Valving 4 Adjust spray pattern Note position of notch in hexhead of adjustment screw then back screw out counterclockwise the number of turns specified in Table 1 N...

Page 15: ...aterial temperature and spray pressure are correct If pattern remains closed upon reaching maxi mum specified number of turns out from point of valving material temperature is too low c If pattern splits or has hollow center even with the adjustment screw at mini mum number of turns from point of valv ing material temperature is too high Refer to FIG 12 d After reaching satisfactory spray pat tern...

Page 16: ...g section of Proportioning Unit Operation Manual for the proportioner in use Ensure flow of air to air cap is adequate but not excessive Table 1 Valving Rod Adjustment for Standard Mixing Chambers Chamber Turns Out From Point of Valving Recommended Distance of Gun from Surface Pattern Size Minimum Maximum 46 800 1 2 turn 2 turns 12 in 304 8 mm 6 in 152 4 mm 46 810 1 2 turn 2 turns 12 in 304 8 mm 6...

Page 17: ... 3 Gallon Gun Service Kit 296981 to perform daily flushing of spray gun without disassembly FIG 15 1 Quart Gun Service Kit For more information about the 1 Quart Gun Service Kit see manual 311340 FIG 16 3 Gallon Gun Service Kit For more information about the 3 Gallon Gun Service Kit see manual 311341 ...

Page 18: ...valve on service block 6 Trigger gun while holding against a grounded waste container until there is a fine unobstructed mist of gun cleaner 7 Release trigger of gun and 1 quart kit and close manual valves on service block 8 Repeat steps 5 7 for other side of gun 9 After initial cleaning remove air cap and flush a second time to ensure thorough cleaning 10 Remove service block of gun service kit f...

Page 19: ...lush thoroughly with gun cleaner 5 Inspect seal and replace if worn or dam aged 6 Reinstall filter screen assembly With seal in place install screen and retainer clip on screen screw 7 Install screen assembly to gun block Ensure screw is tight to prevent leakage 8 Flush gun after cleaning cavity and screen See Clean Spray Gun Procedure page 18 Shut down proportioner and allow chemicals to cool bef...

Page 20: ...n depress and hold trigger to keep valving rod in open position Insert appropriate cleanout spade into cleanout hole and mixing chamber 7 Flush injection slots With valving rod in open position flush each injection slot with gun cleaner Press flush can needle firmly into cleanout hole to create seal Continue until gun cleaner sprays out chamber tip 8 Inspect and clean check valves page 22 9 Instal...

Page 21: ...g rod Push back firmly on piston rod until end of Stop Bar emerges from cylinder FIG 21 Valving Rod Removal 6 Loosen stop bar from positioner Turn posi tioner to adjust length of valving rod as required Retighten stop bar against posi tioner 7 Replace valving rod spring and spring retainer case Grasp firmly push in and turn clockwise to lock in place 8 Adjust felt wiper and soak with gun cleaner 9...

Page 22: ...possible loss of internal chamber parts Ensure brass retaining sleeve is not stuck to felt wiper Place wiper assembly in gun cleaner 11 Remove mixing chamber Hold gun block in one hand with chamber tip pointing into your palm Insert mixing chamber knockout tool into rear of gun block and tap with hammer until chamber ejects Place cham ber in gun cleaner FIG 22 Mixing Chamber Removal 12 Remove clos...

Page 23: ...emove damaged check valve sleeve Remove ball and spring Insert check valve into check valve sleeve removal block FIG 24 While holding block and keeping pressure on head of check valve slice check valve sleeve with razor knife at a 10 15 degree angle rel ative to the plane of removal block Remove check valve from block and peel sleeve off If check valve sleeve remains in gun block after removing ch...

Page 24: ...7 FIG 27 Chamber Seating 7 With o ring in place on underside of gun frame assemble block to frame 8 Install valving rod assembly If using new felt wiper push valving rod through felt with retainer case off chamber Remove felt wiper and any felt buildup on tip of rod Install wiper hand tighten into rear of chamber in gun block Then insert valving rod through piston in air cylinder guiding it throug...

Page 25: ...place 11 Replace air cap 12 Replace check valves and screen screw assembly 13 Replace closure screw in top of gun block 14 Mount gun onto coupling block 15 Connect air supply to gun 16 Adjust felt wiper and soak felt with gun cleaner 17 Close manual valves and press trigger sev eral times to ensure valving rod moves freely ...

Page 26: ...Parts 26 311320G Parts Model D Spray Gun Assembly M L K AF Z B X U V E W AC AK AB AA G AP AL AS Y J F B AD H A S AG AJ D AM D R AE N AN AR AQ T D C AT ...

Page 27: ... 295595 Snap ring 1 X 296624 Kit gun block screen screw includes U V W 1 Y 296611 297139 Felt wiper assembly includes retainer wiper washer pack of 5 Felt wiper pack of 15 and retainer washers pack of 3 Z 111450 O ring 1 AA 296625 Coupling block gasket pack of 10 AB 296121 D gun block complete includes G AA AP 1 AC Mixing chamber includes Y see Table 1 1 AD 295590 Gun frame 1 AE 296629 Spring reta...

Page 28: ...6579 296580 296581 296582 AC chamber 296594 N 800 296595 N 810 296584 L 800 296590 L 800 LM 296585 L 810 296591 L 810 LM 296597 N 296586 L 296592 L LM 296598 N 296587 L 296599 N 296588 L 296600 N 297592 L AK air cap 296838 296634 296634 296635 296635 Cleanout spade 297007 pack of 2 295934 pack of 2 295935 pack of 2 295935 pack of 2 295935 pack of 2 ...

Page 29: ...e same uses as above These chambers have an increased output of approximately 3 to 4 1 2 pounds min 1 4 to 2 0 kg min 55 Size 296597 N 296586 L 296592 L LM Designed for stud areas of trucks and small to medium sized wall applica tions Pattern diameter is about 8 in 20 3 cm with gun 18 to 20 in 45 7 to 50 8 cm from target Output is approximately 6 to 8 pounds min 2 7 to 3 6 kg min 62 Size 296598 N ...

Page 30: ...nd cards are available at no cost Ref No Part No Description Qty A 107083 O ring fluoroelastomer 1 B 295494 Pan head machine screw 8 32 x 3 16 in 1 C 295177 Front head blank 1 D 296627 U cup pack of 5 E 296628 U cup pack of 5 F 295178 Cylinder 1 G 296631 Wear ring 1 H 295179 Buttonhead cap screw 3 J 295484 Piston assembly 1 K 295492 Label warning 1 B A C D E J F G K H ...

Page 31: ...295888 R swivel fitting 1 C 295889 A swivel fitting 1 D 296626 Manual valve assembly pack of 2 E 295619 Mounting screw 15 16 in 1 F 295693 Flush seal pipe plug 1 36 in 2 G 295886 Coupling block 1 Ref No Part No Description Qty A 295889 A swivel fitting 2 B 296626 Manual valve assembly pack of 2 C 295619 Mounting screw 1 D 295693 Pipe plug 2 E 112307 Street elbow 2 F 295886 Coupling block 1 G 29588...

Page 32: ...Notes 32 311320G Notes ...

Page 33: ...ar Minimum Air Inlet Pressure 90 psi 0 6 MPa 6 bar Maximum Output flow rate 16 lbs min 7 3 kg min Minimum Output flow rate 2 lbs min 0 9 kg min Air Inlet Size x npt A Component ISO Inlet Size 5 JIC 1 2 20 UNF R Component Resin Inlet Size 6 JIC 9 16 18 UNF Length 9 25 in 24 cm Height 8 in 20 cm Width without coupling block 2 4 in 6 cm Weight 3 lbs 1 4 kg Wetted Parts Stainless steel carbon steel br...

Page 34: ...al or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation 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 sha...