HP GRACO OR PRO TI1681A - Manual (Page 42)

Repair
42 309293J
Air Cap/Nozzle Replacement
1. Prepare gun for service, page 41.
2. Remove the retaining ring (27) and air cap (9). See
F
IG . 24..
3. Point gun up and squeeze trigger while removing
the fluid nozzle (7) assembly with the multi-tool (37).
Fig. 24. Air Cap/Nozzle Replacement
Use non-silicone grease, Part No. 111265, on the small
o-ring (7b). Do not over-lubricate. Do not lubricate the
contact ring (7a).
4. Lightly lubricate the o-ring (7b). Install it and the
contact ring (7a) on the nozzle (7).
Make sure the electrode needle (29) is finger- tight
(page 43).
5. Trigger gun while installing the fluid nozzle (7) with
the multi-tool (37). Tighten until the fluid nozzle
seats in the gun barrel (1/8 to 1/4 turn past
hand-tight).
6. Install the air cap (9) and retaining ring (27). Make
sure the u-cup (27a*) is in place with the lips facing
forward.
7. Test gun resistance, page 30.
CAUTION
Hold the front end of the gun up and trigger the gun
while removing the nozzle to help drain the gun and
prevent any paint or solvent left in the gun from enter-
ing the air passages.
ti1501a
27
9
7
7a
7b
27a*
37
WARNING
Fire, Explosion, and Electric Shock Hazard
The nozzle contact ring (7a) is a conductive
contact ring, not a sealing o-ring. To reduce
the risk of sparking or electric shock, do not
remove the nozzle contact ring (7a) except
to replace it and never operate the gun with-
out the contact ring in place. Do not replace
the contact ring with anything but a genuine
Graco part.