Technical data
22 309030
Service
Reassembly
1. Non-circulating guns only: Lubricate the backup
(20) and o-ring (21) and install them on the fluid
outlet port plug (19). Install the plug in the fluid
outlet port of the fluid housing (2). See Fig. 15.
2. All guns: Reinstall the gasket (22) in the fluid
housing (2).
3. Install the o-rings (8*, 9*) on the piston (3). Install
two o-rings (10*, 11*) on each of the piston stems
(T). Lubricate all the o-rings, the piston, and the
piston stems.
4. Insert the piston (3) into the piston housing (1).
5. Remove the protective paper from the sticky side
of the gasket (12*) and adhere the gasket to the
bottom of the piston housing (1), making sure the
three holes in the gasket are properly aligned with
the matching holes in the housing.
6. Lubricate the new fluid packing (17) and insert it
into the packing nut (16). Insert the packing nut
into the fluid housing (2) and torque to 95–105 in-lb
(10.7–11.8 Nm).
7. Align the gasket (15*) as shown in the exploded
view in Fig. 15. Place the gasket on the piston
housing (1), then install the fluid housing (2) onto
the piston housing. Torque the four screws (14) to
65 in-lb (7.3 Nm).
8. To avoid galling of the fluid nozzle seat in the fluid
housing, apply a thin film of lubricant to the seat.
Install the nozzle into the fluid housing. Torque the
nozzle securely to 145–155 in-lb (16.4–17.5 Nm).
NOTE: If you are replacing the needle tip (5a), apply
semi-permanent anaerobic sealant to two threads at
the end of the needle shaft. Assemble the needle tip to
the shaft and hand tighten. Allow adequate time for the
sealant to cure before installing the needle assembly
into the gun.
9. Lubricate and install the needle (5) into the back of
the gun assembly. Push it straight in through the
piston.
10. Install the needle stop (29) on the needle. Coat the
setscrew (30) with semi-permanent anaerobic
sealant and install the screw into the needle stop.
Torque to 4–5 in-lb (0.45–0.56 Nm). Pull on the
needle to make sure it seats fully.
11. Install the springs (6, 7).
12. Lubricate the threads of the piston housing (1).
Screw the cap (4) onto the housing until it bottoms
out.
13. Install the air cap (24) and air cap retainer (25).
14. Reinstall the gun on the manifold with the four
screws (13). Torque to 65 in-lb (7.3 Nm).