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2. Examine the plastic section of the needle shaft
and the packing tube for signs of carbon tracking.
Also inspect the air passages and packing chamber
of the barrel for signs of scratches, additional
carbon tracking, or dried paint. Shine a small
flashlight into the front of the barrel to highlight any
damage in these areas.
C A U T I O N
C A U T I O N
C A U T I O N
C A U T I O N
C A U T I O N
! ! ! ! !
Barrels with dry paint, scratches, or high
>
voltage tracking marks in the air and/or
packing chamber passages MUST BE
REPLACED. Neglecting to replace the
barrel may lead to reduced gun efficiencies
and premature component failure.
3. From time to time it is desirable to test the
electrical integrity of the resistive electrode. See
"Needle/Electrode Resistance Testing" in the
"Maintenance" section.
Reassembly
Reassembly
Reassembly
Reassembly
Reassembly
(Refer to Figures 10, 11, 12, and 13)
(Refer to Figures 10, 11, 12, and 13)
(Refer to Figures 10, 11, 12, and 13)
(Refer to Figures 10, 11, 12, and 13)
(Refer to Figures 10, 11, 12, and 13)
Item #
Item #
Item #
Item #
Item #
Description
Description
Description
Description
Description
9
Electrode Assembly
11
Cartridge Seal Assembly
13
2-Piece Needle Shaft Assembly
Figure 10: Front Needle Shaft Assembly
Figure 10: Front Needle Shaft Assembly
Figure 10: Front Needle Shaft Assembly
Figure 10: Front Needle Shaft Assembly
Figure 10: Front Needle Shaft Assembly
AH-94-04.7
REA-90 and 90L Spray Applicators - Maintenance
1. Prior to installing the non-adjustable cartridge
seal, fill the internal bore with dielectric grease.
Then place the cartridge seal, with the black
plastic section rearward, onto the front of the
needle shaft. Then screw it on and over the
external threads of the needle shaft. Once both
internal o-rings have cleared the threads, slide it
onto the sealing area.
Do NOT push the cartridge seal straight
>
over the shaft threads. The threads will
damage the internal o-rings and cause fluid
leaks.
2. Screw the needle/electrode onto the front of the
needle shaft and hand tighten.
Item #
Item #
Item #
Item #
Item #
Figure 13: Rear Needle Shaft Assembly
Figure 13: Rear Needle Shaft Assembly
Figure 13: Rear Needle Shaft Assembly
Figure 13: Rear Needle Shaft Assembly
Figure 13: Rear Needle Shaft Assembly
3. Fill the inner diameter of the packing tube with
dielectric grease.
C A U T I O N
C A U T I O N
C A U T I O N
C A U T I O N
C A U T I O N
! ! ! ! !
Description
Description
Description
Description
Description
13
2-Piece Needle Shaft Assembly
14
Packing Tube
15
Seal Retainer
16
O-Ring
17
U-Cup
18
Spacer
20
Packing Nut
21
Trigger Adjustment Nut
82
Needle Shaft Spring Retainer
3 8
3 8
3 8
3 8
3 8
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