Graco Inc. 224200 - Manual (Page 26)

26 308131
Service
Fluid Packing Rod Repair
The fluid packing rod can be replaced as individual
parts or as an assembly. The overall 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 the marks are present, replace
the barrel.
If the parts are purchased separately, assemble them
as instructed below and as shown in Fig. 17.
1. Place the packing nut (28c) and o-ring (28g) on the
fluid rod (28b). Flats on the packing nut must be
facing toward the back of the fluid rod.
2. Fill the entire inner cavity of the spacer (28d) with
petroleum jelly. Place the spacer on the fluid rod
(28b) in the direction shown in Fig. 17. Generously
apply petroleum jelly to the outside of the spacer.
3. Place the fluid packing (28f), needle packing (28e),
and housing (28a) on the fluid rod (28b) as shown
in Fig. 17.
4. Lightly tighten the packing nut (28c). The packing
nut is properly tightened when there is 2 lbs. (9 N)
of drag force when sliding the packing housing
(28a) assembly along the shaft. Tighten or loosen
the packing nut as needed.
5. Install the o-ring (28h) on the outside of housing
(28a) and lubricate the o-ring.
6. Make sure the spring (30) is installed against the
nut (E) as shown in Fig. 17.
7. Install the fluid packing rod assembly (28) into the
gun barrel. Using the multi-tool (62), tighten the
assembly until just snug, then check the drag on
the fluid rod.
8. Install the trigger (13) and tighten the trigger
screws (4).
9. Install the electrode needle, nozzle and resistor
stud assembly and the air cap assembly as
instructed on page 23.
10. Test the gun resistance as instructed on page 20.
Fig. 17
28
28e
28a 28d
28b
28h
0383
28c
28f
28g
30 E
Item 30 is not included with the Packing/Needle Assy. (28)
Apply a very light coat of lubricant
Fill entire inner spacer cavity with petroleum jelly and
generously lubricate outside of spacer
Tighten packing nut to 2 lbs (9 N) of drag force