Repair
311001C 21
4. Inspect the o-rings (5e*, 5f*, and 5g*) in place.
Carefully remove the o-rings from the diffuser hous-
ing (5a) and replace if necessary.
5. Remove the seat nut (5d†), seat (5c†) and seat gas-
ket (5b†, model G40 gun only) using a 7/32 in. hex
wrench.
6. Inspect the seat (5c†) and seat gasket (5b†) and
replace if necessary.
7. Reinstall the seat gasket (5b†, model G40 gun
only), seat (5c†), and seat nut (5d†). Torque to
45-50 in-lb. Be sure not to overtighten the nut.
Needle Repair
1. Remove the diffuser, see Seat Repair, page 20.
2. Remove the trigger pivot pin nut (14‡), pivot pin
(13‡), and trigger (3‡) using the gun tool (30) and
nut driver (29). See FIG. 38.
3. Remove the fluid needle assembly (2) from the front
of the gun by using the nut driver tool (29). If the
needle is bent or damaged, or the packing is worn
or leaking, replace the entire needle assembly. If
replacement is necessary, be sure to remove the
o-ring (2a*) as it may stick inside the gun body. See
FIG. 39.
• When reinstalling the carbide seat (5c†), the
tapered end of the seat must point toward the
gun tip.
• The acetal seat (5c†), standard in model G15
guns (249233), can be reinstalled in either
direction.
FIG. 37
TI6572A
5a
1
30
5c†
5g*
5f*
5e*
5d†
5b†
(G40 only)
FIG. 38
FIG. 39
TI6574A
14‡
13‡
3‡
TI6575A
2
29
1
2a*