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30843812
Service
WARNING
INJECTION HAZARD
To reduce the risk of an injection injury,
follow the Pressure Relief Procedure
on page 7 before checking or servicing
the gun and whenever you are instructed to relieve
the pressure.
Repair Notes
The needle and seat are available only as a kit which
includes items 2a to 2e.
The Standard Needle and Seat Kit, 237398, has the
number 090 stamped on the needle and seat.
A Non-diffused Needle and Seat Kit, 237260, has the
number 125 stamped on the needle and seat. It is
recommended only for use with mastics, sealers and
other high viscosity materials which have fillers that
cannot pass through the standard seat’s diffuser.
Use high quality, general purpose grease where
grease is indicated.
Disassembly
NOTE: If replacing only the needle and seat, Step 5 is
not required.
1. Relieve the pressure.
Fig. 6
30
21
A
03967
2. Disconnect the fluid hose (A). Remove the tip
guard (30). Unscrew the spring screw (21) about
1/4 in. (7 mm) to release spring tension.
See Fig. 6.
Fig. 7
2a
2b
03969
3. Unscrew the valve seat (2a). Remove the gasket
(2b). See Fig. 7.
Fig. 8
29
28
27
18
25
03970
4. Remove one e-clip (27). Push out the pin (18).
Remove the screw (29), pivot pin (28), and trigger
(25). See Fig. 8.
Fig. 9
24
03971
5. Remove the screws (24). See Fig. 9.