Graco Inc. 12004X - Manual (Page 11)

Service
309739 11
Model 12006
Disassembly
1. With trigger (20) depressed, remove collar (17)
securing nozzle (18) to gun.
2. Remove nozzle (18), holding adapter (10) firmly to
prevent it from turning.
3. Remove gasket (9). Clean and inspect for damage.
4. Remove adapter (10) from gun body.
5. Remove both screws (12) and lock washers (25) on
one side of trigger (20) and push both trigger pins
(13) out of body.
6. Loosen lock nut (15) at rear of gun.
7. Unthread spring retainer (16) and remove spring
(14).
8. Loosen and remove adjustment screw (6) on pack-
ing nut (3) and pull needle assembly from rear of
gun. Inspect for damage, replace if needed.
9. Remove packing assembly from gun.
10. Unthread packing nut (3) from body.
11. Remove adjustment screw (6) and o-ring (5) and
seals (4).
Reassembly
Clean all parts thoroughly before reassembling. Check
them carefully for damage or wear. Replace parts as
needed. For best results replace the original parts with
new parts in repair kits.
Prior to assembly, lubricate all seals and o-rings with
PARKER-O-LUBE or an equivalent lubricant.
1. Replace o-ring (5) and seals (4) in packing nut (6).
2. Thread packing nut (3) into gun body.
3. Install packing assembly through rear of gun.
4. Install needle assembly through rear of gun.
5. Install spring (14) and spring retainer (16) into gun
body. Adjust spring retainer to allow approximately
1/32 in. of free play on trigger.
6. Tighten lock nut (15).
7. Install trigger (20) and insert trigger pins (13) in gun
body.
8. Secure trigger pins (13) using screws (12) and lock
washers (25).
9. Replace o-ring (11). Lubricate with petroleum jelly to
aid in reassembly.
10. With trigger (20) retracted, screw adapter (10) into
gun body.
11. Insert gasket (9) in collar (17).
12. While holding adapter stationary, screw collar (17)
and nozzle (18) into adapter. Do not overtighten col-
lar.
13. Reconnect flow gun to material supply line.
14. Turn on material supply line.
15. Return flow gun to normal operating condition.
Needle
O-Ring
Yoke
Packing Nut
Adjusting Screw
Nut
Packing Support
Seal
ti4057a