Needle Packing, Fluid Insert, Spreader Valve Assembly - DeVilbiss HD Series Technical Bulletin

Parts Replacement/Maintenance
NEEDLE PACKING
REPLACEMENT INSTRUCTIONS
13. Remove trigger using SPN-8 or TORX (T20) driver. (See
figs 25 & 26)
14. Remove fluid adjusting knob and needle spring with
spring pad from gun. (See figs 27 & 28)
15. Remove fluid needle from gun body. (See fig 29)
16. Loosen and remove packing nut using SPN-8 Key or a
straight blade screwdriver. (See figs 30 & 31)
17. Discard old packing and packing spring if replacing.
Clean packing if reusing. Also clean packing spring and
nut. (See fig 32).
18. Re-assemble the packing, (See fig 32). Assemble into
gunbody by hand (see fig 33) and 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). Reinstall trigger. (See figs 25 &
26).
21. 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.
22. Trigger gun several times to verify correct operation.
FLUID SUPPLY INSERT
The fluid insert and seal are NOT replaceable.
Do not remove these parts.
No maintenance is required for these parts other than
regular cleaning.
SPREADER VALVE ASSEMBLY
REPLACEMENT/MAINTENANCE
The spreader valve assembly can be replaced if damaged.
Remove using SN-28 (14 mm) Spanner (See figs 35 & 36).
The internal seal can be replaced and is included in the GTI
PRO Gun Rebuild Kit.
© 2013 Finishing Brands UK Ltd.
11