WA R N I N G
!
CAUTION
!
DO NOT
overtighten the hexagon adjustment
nuts or damage may occur to the plastic threads or
the needle shaft may break. Finger tight is typically
sufficient. (Maximum torque of 18-24 in•oz).
Figure 29: Trigger Adjustment Nut Dimensions
Figure 27: Spring Washer Assembly Sequence
All six (6) spring washers
MUST
be replaced al-
ternately as shown in Figure 33, or the applicator will
malfunction.
12. Place the packing nut (large bore first) on the rear
needle shaft section.
13. Screw the trigger adjustment nut onto the rear needle
shaft section with the hexagon rearward and the spring
retainer with the hexagon forward. Do not lock the
hexagon nuts in place.
14. Install the needle shaft sub-assembly into the packing
chamber from the rear of the barrel with the needle/
electrode forward.
15. Push the needle shaft sub-assembly forward until the
packing nut will engage its mating thread in the barrel
and screw it into place by hand, approximately 3 turns.
16. Pull the needle shaft rearward as far as it will go.
17. Install the fluid nozzle, air cap, and retaining nut (refer
to "Air Cap" and "Fluid Nozzle" in the "Maintenance"
section).
18. Tighten the packing nut using the spanner tool on the
special multi-purpose wrench until a firm resistance is
felt on the needle shaft while reciprocating it by hand.
Figure 28: Needle Shaft Assembly Into Barrel
19. Push the needle shaft forward until the needle/electrode
seats into the fluid nozzle.
20. Adjust the trigger adjustment nut as far forward on the
needle shaft as possible.
21. Adjust the needle shaft spring retainer until the rear of
the hexagon is 11/16-inch from the rear surface of the
barrel packing chamber (refer to Figure 29).
22. Hold the spring retainer in place and screw the front
trigger adjustment nut rearward until contact is made.
Use two 3/8" open-end wrenches to tighten and lock
the adjustment nuts in place on the needle shaft.
AH-06-01-R17 (08/2019)
46 / 79
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