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                                                                   © 2012 Finishing Brands UK Ltd.

 

 

Parts Replacement/ 
Maintenance 

 
SPRAY HEAD SEAL 
REPLACEMENT 
 

1.

 

Remove air cap and retaining ring. (See fig 37) 

2.

 

Remove fluid adjusting knob, spring, and spring pad. (See 
figs 38 & 39) 

3.

 

Remove fluid needle from gun body. (See fig 40) 

4.

 

Remove fluid nozzle using SN-28 (10 mm) ring Spanner, 
and then remove the Front Plate. (See figs 41, 42 & 43) 

5.

 

Remove Spray Head. (See fig 44). 

6.

 

Clean Spray Head with a soft brush (See fig 45). 

7.

 

Remove Spray Head seal using a small screwdriver or 
pick. (See fig 46) 

8.

 

Clean front of gun if required, using a soft brush, as well 
as the Spray Head, fluid nozzle, air cap, and retaining ring. 
(See fig 47) 

9.

 

Place a new Spray Head Seal onto the front of the gun, 
making sure the flat on the seal is aligned with the flat in 
the gun. (See fig 48). 

10.

 

Fit the Front Plate onto the Spray Head, fit Spray Head to 
the Gunbody, ensuring the flat on the underside of the 
Spray Head locates with the flat in the Gun Body. Fit Fluid 
Nozzle, Air Cap, and Retaining Ring. Torque the Fluid 
Nozzle to 18–20 nm. Don’t over torque the fluid nozzle. 
(See figs 44, 43, 42, 41 and 37) 

11.

 

Insert Fluid Needle all the way into the Gun Body, seating 
in the Fluid Nozzle. (See fig 40) 

12.

 

Reassemble Needle Spring, Spring Pad, and Fluid 
adjusting Knob. (See figs 39 & 38) 

13.

 

Trigger gun fully and screw in Fluid Adjusting Knob until it 
stops. Back it off 1/2 turn and gun will have full needle 
travel. 

14.

 

Trigger gun several times to verify correct operation

.

 

 

Summary of Contents for GFG PRO

Page 1: ...SB E 2 810 ISS 05 Technical Bulletin GFG PRO Gravity Spray Gun AUTOMOTIVE REFINISHING EN...

Page 2: ...ical Data 4 Safety Precautions 5 Parts List 6 Exploded parts View 7 Installation Operation Preventive Maintenance Cleaning 8 Parts Replacement Maintenance 9 A Servicing Air Valve 9 B Replacing Air Val...

Page 3: ...Aircaps and 3 Nozzles C1 for base and clearcoat application C2 is used for higher viscocity materials The ordering code for the spray guns is Eg GFGPRO C1 14 where C1 C1 Aircap Alternative is C2 14 1...

Page 4: ...G 1 4 1 4 NPS 15 500cc Acetal Cup easy clean anti static 7 Self Adjusting Needle Packing for trouble free operation 16 Cup Lid with Drip Free Vent avoid drips 8 Trigger ergonomic for comfort 17 Air Va...

Page 5: ...erial before spraying If in doubt contact your material supplier The use of respiratory protective equipment is recommended at all times The type of equipment must be compatible with the material bein...

Page 6: ...rflow Valve PRO 411 K 1 13 Body Bushing 1 45 Circlip 25746 007 K5 1 14 Body Bushing Seal SN 6 K 1 46 Valve Head 1 15 Fluid Needle GFGPRO 320 K 1 47 Washer 1 16 Needle Spring 1 48 Valve Body 1 17 Needl...

Page 7: ...2012 Finishing Brands UK Ltd 7...

Page 8: ...e 10 The pattern size can be reduced by turning spreader valve knob 23 clockwise 11 Hold gun perpendicular to surface being sprayed Arcing or tilting may result in uneven coating 12 The recommended sp...

Page 9: ...g 7 7 CLEAN a Remove all paint build up See fig 8 b The 4 poppet holes must be clear See fig 9 c Stem must be free to float in poppet See fig 10 d Stem must slide through cage bore with slight resista...

Page 10: ...Tool 56 See figs 18 19 6 Clean air valve bores in gun body with the brush supplied in the kit 7 Place new rear seal onto Service tool 56 grooves must fit in service tool form See fig 20 8 Push rear se...

Page 11: ...then tighten See figs 30 and 31 19 Insert fluid needle all the way into gun body seating in fluid nozzle See fig 34 20 Insert needle spring spring pad and fluid adjusting knob See figs 28 27 Reinstal...

Page 12: ...ring See fig 47 9 Place a new Spray Head Seal onto the front of the gun making sure the flat on the seal is aligned with the flat in the gun See fig 48 10 Fit the Front Plate onto the Spray Head fit...

Page 13: ...n air cap Chart 2 Fluid Nozzle Range Fluid Needle NOTE When replacing the fluid nozzle or fluid needle replace both at the same time Torque to 18 20 nm 13 15 ft lbs Don t over tighten the fluid nozzle...

Page 14: ...ot inverted it is on the fluid nozzle Clean nozzle If problem persists renew nozzle Heavy centre pattern Spreader adjustment valve set too low Atomising pressure too low Material too thick Turn out co...

Page 15: ...nd out needle adjusting screw or use larger nozzle size Fluid leaking from packing nut Packing worn Replace Fluid leaking or dripping from front of gun Fluid nozzle or fluid needle worn or damaged For...

Page 16: ...office Finishing Brands UK Limited 400 Capability Green Luton Bedfordshire LU1 3AE UK Registered in England No 07656273 Vat No GB 113 5531 50 ACCESSORIES DGi PRO Digital Pressure Gauge DGIPRO 502 BAR...

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