Repair Packing Rod - Graco PRO Xs Instructions - Parts Manual

Repair Packing Rod

You may replace the packing rod as individual parts or
as an assembly. The assembly is pre-adjusted at the
factory.
NOTE: Before installing the fluid packing rod into the
gun barrel, make sure the internal surfaces of the barrel
are clean. Remove any residue with a soft brush or
cloth. Check the inside of the barrel for marks from high
voltage arcing. If marks are present, replace the barrel.
To assemble the individual parts:
1. Place the packing nut (8e) and seal (8b†) on the
fluid rod (8h). Flats on the packing nut must face the
back of the fluid rod. The seal o-ring must face away
from the packing nut. See F
2. Fill the inner cavity of the spacer (8g†) with dielec-
tric grease (49). Place the spacer on the fluid rod
(8h) in the direction shown. Generously apply
dielectric grease to the outside of the spacer.
3. Place the u-cup packing (8c†), packing spreader
(8d†), and housing (8f) on the packing rod (8h).
8d†
8f
8a†
F . 25. Packing Rod
IG
313227E
. 25
IG
8e
8b†
8g†
8c†
4. Lightly tighten the packing nut (8e). The packing nut
is properly tightened when there is 3 lb (13.3 N) of
drag force when sliding the packing housing (8f)
assembly along the rod. Tighten or loosen the pack-
ing nut as needed.
5. Install the o-ring (8a†) on the outside of housing
(8f). Lubricate the o-ring with non-silicone grease,
Part No. 111265. Do not over-lubricate.
6. Install the spring (25) against the nut (E) as shown.
7. Install the packing rod assembly (8) into the gun
barrel. Using the multi-tool (37), tighten the assem-
bly until just snug.
8. Install the electrode needle (7), page 31.
9. Install the nozzle (4), gun shroud (48), and air cap
(3), page 30.
10. Install the charging probe (2), see page 9.
11. Test gun resistance, page 22.
8h
Gun Repair
25
E
TI12719a
33