Graco Inc. 12004X - Manual (Page 9)

Service
309739 9
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
Disassembly
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.
Cartridge Disassembly Procedure
1. Remove guide (22) from needle (8).
2. Remove two o-rings (23) from guide (22).
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.
9. Hold yoke (1) in soft-jawed vice. Unlock stop nut (2).
10. Separate needle (8) from yoke (1).
ti4035a
ti4036a
ti4039a
ti4040a