Graco A Series Instructions-Parts List Manual page 10

Changing the Needle (Fig. 7)
NOTE: Needle (C), diffuser/seat (A), gasket (B) and
locknut (D) must be replaced together. They are
included in Repair Kit 218070.
A B
C
Fig. 7
Disassembly
1. Follow Pressure Relief Procedure on page 4.
2. Remove tip guard assembly.
3. Squeeze trigger while unscrewing diffuser/seat (A)
and gasket (B).
4. Remove locknut (D) and bracket (10).
5. Tap rear of gun with a plastic mallet to push needle
assembly out front.
Reassembly
1. Guide threaded end of needle assembly into front
of gun.
10 309237
Service
2. Install bracket (10) and locknut (D) loosely on
3. Squeeze trigger while installing gasket (B) and
11
10
D
4. If gun handle (13) was removed, hand tighten into
5. Adjust needle before using gun.
6. Be sure trigger guard and tip guard are installed
Adjusting the Needle (Fig. 7)
1. Engage gun safety latch.
2. Hold gun with nozzle straight up.
3. Remove trigger guard (3). (Fig. 6).
4. Hold your finger against trigger with light pressure.
5. Turn adjusting nut 3/4 turn counter--clockwise.
6. Connect fluid hose. Install tip guard and prime the
threaded end of needle (C). Squeeze trigger to pull
needle assembly (C) into gun body (11). Tighten
locknut (D) as required to install needle (C).
diffuser/seat (A). Torque diffuser/seat to 26--32
ft--lb (35--43 NSm).
fluid housing (11). It should fit easily.
before using gun.
Using a 5/16--in, open--ended wrench, turn locknut
(D) clockwise until you feel trigger depress slightly.
system. Trigger gun and release it. The fluid flow
should stop immediately. Engage safety latch and
try to trigger gun. No fluid should flow. If the
gun fails either test, relieve pressure, disconnect
hose and readjust needle.