Model | Graco Inc 309739D, ti3795a, ti4057a, ti3810a, 12004, 12006

14.Hold adapter (9) stationary and screw nozzle and collar (16) into adapter. Do not over tighten collar.

15.Reconnect flow gun to material supply line.

16.Turn on material supply line.

17.Return flow gun to normal operating condition.

Model 12005

1.Actuate gun to purge material and relieve pressure in gun. Pressure Relief Procedure, page 5.

2.Disconnect material supply line from gun handle.

3.Hold adapter (9) stationary and unscrew nozzle and collar (16).

4.With trigger depressed, unscrew adapter (9) from gun body (17).

5.Remove o-ring (10) from adapter (9).

6.Loosen lock nut (14).

7.Carefully unscrew and remove spring retainer (15)

8.Remove screws (11) and lock washers (28) from trigger pins (12).

9.Pull trigger pins (12) from gun body (17) and remove trigger (18).

10.Remove piston valve (20) from front of gun.

11.Unscrew packing nut (5) from gun body (17).

12.Remove cartridge assembly from gun.

Service

1. Remove guide (22) from needle (8).

ti4035a

2. Remove two o-rings (23) from guide (22).

ti4036a

3.Unwind spiral PTFE o-ring backup (21) from guide(22).

4.Loosen adjustment screw (3) while holding packing nut (5).

5.Extract needle (8) from packing nut (5).

6.Remove o-ring (4) from groove in packing nut (5).

7.Remove adjustment screw (3).

8.Push three seal-needles (6) out of packing nut (5) with soft rod or dowel.

ti4039a

9. Hold yoke (1) in soft-jawed vice. Unlock stop nut (2).

ti4040a

10. Separate needle (8) from yoke (1).

309739