SprayTECH GPX 750 Owner's Manual

Gas piston pump

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GPX 750

G a s Pi s to n Pu m p

Printed in the U. S. A.

Model Number 0509004

Owner's Manual

SprayTECH

1770 Fernbrook Lane

Minneapolis, MN 55447

Technical Assistance: 1-800-292-4637

Order Entry: 1-800-443-4500

ww w.s pray t e chi nc . c o m

Fax: 1-800-525-9501

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Summary of Contents for SprayTECH GPX 750

Page 1 1770 Fernbrook Lane Minneapolis, MN 55447 Technical Assistance: 1-800-292-4637 Order Entry: 1-800-443-4500 Fax: 1-800-525-9501 ww w.s pray t e chi nc . c o m Printed in the U. S. A. 0103 © 2003 SprayTECH. All rights reserved. Form No. 0509811A...
Page 2: Table Of Contents
• Plastic can cause static sparks. Never hang plastic to 228BAR fluid pressure. enclose a spray area. Do not use plastic drop cloths when spraying flammable materials. • Use lowest possible pressure to flush equipment. © SprayTECH. All rights reserved.
Page 3: Gasoline Engine Safety
• Wear clothing to keep paint off skin and hair. • Always unplug cord from outlet before working on equipment. • Do not use this equipment to spray water or acid. CAUTION Do not lift by cart handle when loading or unloading. © SprayTECH. All rights reserved.
Page 4: General Description
Refer to the engine 5. Move the engine ON/OFF switch to the ON position. manufacturer's service manual (supplied). 9. Close the fuel shut-off lever and fill the gas tank with gasoline. Use only high quality, unleaded gasoline. © SprayTECH. All rights reserved.
Page 5: Painting
Open the fuel valve lever. NOTE: Turning the pressure up higher than needed to atomize the paint will cause premature tip wear b. Move the throttle lever away from the gas tank. and additional overspray. © SprayTECH. All rights reserved.
Page 6: Pressure Relief Procedure
If the pressure is set too low, tailing will appear or the paint will spatter out in gobs rather than in a fine spray. Paint tailing pattern Do not flex wrist while spraying. © SprayTECH. All rights reserved.
Page 7: Cleanup
4. If you have any further questions concerning your SprayTECH airless sprayer, call SprayTECH: 16. Continue to trigger the spray gun into the waste container until the solvent coming out of the gun is clean.
Page 8: Maintaining The Engine
(Replacement elements can be purchased from your local SprayTECH dealer.) • After each 50 hours of operation: Change the engine oil. Spark Plug •...
Page 9: Replacing The Potentiometer
WARNING Electrostatic discharge (ESD) potential could cause Electrostatic discharge (ESD) potential could cause damage to electronic pressure control. Use SprayTECH damage to electronic pressure control. Use SprayTECH ESD wrist strap P/N 0507958 or equivalent when working ESD wrist strap P/N 0507958 or equivalent when working on electronic pressure control.
Page 10: Replacing The Gears And/Or Slider Assembly
Socket Screw pins with their corresponding holes in the pump housing. Slide the pump housing onto the gear housing until there Slider Assembly is no gap between the housings and gasket. © SprayTECH. All rights reserved.
Page 11: Replacing The Electronic Pressure Control (Epc) Board
7. Install the four screws that secure the EPC assembly to Fitting Fitting the EPC housing. Tighten securely. Cart 8. Take the sprayer to a SprayTECH Authorized Service Center for re-calibration. Filter Assembly Hex Screw © SprayTECH. All rights reserved.
Page 12: Servicing The Clutch Assembly
9. Using an 1/8” hex wrench, remove the two set screws the EPC housing. Tighten securely. from the taper lock bushing 22. Take the sprayer to a SprayTECH Authorized Service 10. Thread one of the set screws into the unused, threaded hole Center for re-calibration.
Page 13 Plug WARNING Electrostatic discharge (ESD) potential could cause Housing Gasket damage to electronic pressure control. Use SprayTECH ESD wrist strap P/N 0507958 or equivalent when working Grease Seal on electronic pressure control. 5. Using a Phillips screwdriver, remove the four screws that secure the EPC assembly to the EPC housing.
Page 14: Servicing The Fluid Section
WARNING Electrostatic discharge (ESD) potential could cause Before proceeding, follow the Pressure Relief Procedure damage to electronic pressure control. Use SprayTECH outlined previously in this manual. Additionally, follow all ESD wrist strap P/N 0507958 or equivalent when working other warnings to reduce the risk of an injection injury, on electronic pressure control.
Page 16: Troubleshooting
1. Turn the pressure control knob clockwise to supply power to the unit and increase the pressure setting. 2. Faulty or loose wiring. 2. Inspect or take to a SprayTECH authorized service center. 3. The gas tank is empty. 3. Fill the gas tank.
Page 17 4. Add solvent to the material according to the viscous. manufacturer's recommendations. The unit lacks power. 1. The pressure adjustment is too low. 1. Rotate the pressure control knob clockwise to increase the pressure setting. © SprayTECH. All rights reserved.
Page 18: Consignes De Sécurité
• Tous les accessoires doivent être homologués pour une pression égale ou supérieure à 3 200 lb/po2 / 228BAR. Cela s'applique, entre autres, aux têtes de pulvérisation, aux accessoires du pistolet et aux flexibles. Français © SprayTECH. Tous droits réservés.
Page 19 à une pression égale ou supérieure à 3 200 lb/po2 / 228BAR. • Ne jamais pulvériser lorsqu'il vente. • Porter des vêtements pour protéger la peau et les cheveux contre tout contact avec la peinture. Français © SprayTECH. Tous droits réservés.
Page 20: Precauciones De Seguridad
Consulte el manual del motor • Todos los accesorios deben tener una capacidad de 3300 para obtener información completa de seguridad. lb/pulg2 / 228BAR o mayor. Esto incluye las boquillas de atomizador, pistolas, extensiones y mangueras. Español © SprayTECH. Todos los derechos reservados.
Page 22: Parts Listings
0509924 Front cover..........1 0509551 Lock nut ............4 0509552 Screw............4 0507786 Lock washer..........2 0509636 Plug, nylon ..........2 0507787 Hex screw ...........2 0509142 Fluid section assembly .......1 0509553 Screw............2 0509633 Socket screw ..........2 0509928 Grounding cable .........1 © SprayTECH. All rights reserved.
Page 23: Drive Assembly
0509615 Hex screw ...........4 0507749 Seal nut............1 0507786 Lock washer..........4 0509557 Mounting plate ..........1 NOTE: All electrical work should be performed by a 0507784 Grommet, 7/16”...........1 Spraytech authorized service center. 0509531 Grommet, liquid tight ........1 © SprayTECH. All rights reserved.
Page 24: Fluid Section Assembly
NOTE: When repacking the fluid section, make sure the raised lip on the bottom of the lower packing is fully outside the packing around the piston rod after insertion of the piston rod. © SprayTECH. All rights reserved.
Page 25: Cart Assembly
Outlet fitting, 3/8” ........1 9885571 Plug.............2 0507738 Plug, 1/4” ............1 0295606 Lock washer..........4 0507793 Fitting, 1/4”..........1 0295608 Screw............4 0509522 Filter housing ..........1 0509575 Cart (includes item 9) .........1 0507690 PRIME/SPRAY valve assembly....1 0509624 Wheel ............2 © SprayTECH. All rights reserved.
Page 26: Prime/Spray Valve Assembly
Cam base ...........1 0089799 5006543 Groove pin ..........1 Engine 0507662 Valve handle ..........1 Labels Part # Description 0509519 Logo label, front 0295840 Warning label, explosion 0295841 Warning label, injection 0295805 Shock hazard label 0509819 “No Oil” label © SprayTECH. All rights reserved.
Page 27: Accessories
G-10 Four Finger Spray Pack with 50’ x 1/4” airless hose 0502012 G-10 Two Finger Spray Pack with 50” x 1/4” Airless Hose 0279920 Separating oil 0507958 Electrostatic discharge (ESD) wrist strap 9870307 Grease, 6 lb. can © SprayTECH. All rights reserved.
Page 28: Limited Warranty
SprayTECH’s option, refund to the original purchaser the full purchase price for the product in exchange for the return of that product. However, SprayTECH will not replace or repair any fluid pump component on account of wear more than once during the two year warranty period.

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0509004