SERVICE
ES ON±OFF Valve Removal & Replacement
1.Loosen and remove the nut (35). Remove the lever (37) and washer (36). See Fig 22. Insert the hex head wrench into the hex end of the valve (39), and turn it to loosen and remove the valve.
2.Clean and inspect parts for wear or damage. Re- place if necessary. Lubricate the o±rings (38) and valve (39) with petroleum jelly.
3.Install the regulator disc (4) so that the beveled face of the disc faces into the valve (39).
4.Install the valve (39) with the regulator disc (4) and o±rings (38) into the gun handle (2) so that the larger opening of the valve cylinder faces toward the front of the gun handle (2).
5.Install the wave washer (36), lever (37), and nut (35) on the valve stem. Tighten the nut (35) and torque it to 0.225 NSm (2 in±lb).
Fluid Adjusting Screw Replacement
Remove the retaining ring (23) from the fluid adjusting screw (28). Refer to the Parts Drawing. Unscrew and re- move the fluid adjusting screw from the back of the gun handle. Install the new assembly.
KEY
2 | Key | 37 | Valve Lever |
4 | Regulator Disk | 38 | O±Ring |
35 | Nut | 39 | Air Valve |
36Wave Washer
| 39 | 2 |
|
| |
38 |
| 38 |
|
| |
| 4 |
|
36
37
35
Torque to 0.225 NSm (2 in±lb)
Fig 22
Muffler and Check Valve Replacement
1.Remove the screw (71), adapter retainer (70) and bulkhead retainer (85) from the gun handle. See Fig 23.
2.Pull the muffler (80) from the gun handle and replace with a new muffler.
3.Insert a 3.18 mm (0.125 in.) rod into one of the holes in the valve check retainer (78) and pry it out of the adapter retainer (70). Be ready to catch the ball (77) and spring (81).
4.Install a new ball (77) and spring (81) in the adapter retainer (70) and snap the valve check retainer (78) back into place on the adapter retainer.
5.Install the adapter retainer (70) and bulkhead retainer (85) on the gun handle using the screw (71).
71
80
Apply sealant to outside surface
70
77
KEY81
70 Adapter Retainer | 78 |
71Screw
77 Ball
78Valve Check Retainer
80Muffler
81Spring
85 Bulkhead Retainer
85
Fig 23
768 5
