Service - Graco C Series Instructions Manual

B
1
A
Torque to 26–32 ft-
1
lb (35–43 N.m)
2
Torque to 80–90 in-lb
(9–10 N.m)
Fig. 7
NOTE: The needle (C), diffuser/seat (A), gasket (B)
and locknut (D) must be replaced together. They are
included in Kit 218070.
Disassembly
(See Fig 7 )
1. Follow the Pressure Relief Procedure on page
5.
2. Remove the tip guard assembly. See Fig 2.
3. Squeeze the trigger while unscrewing the diffuser/
seat (A) and gasket (B).
4. Remove the locknut (D) and end cap (23).
5. Tap the rear of the gun with a plastic mallet to
push the needle assembly out the front.
Reassembly
(See Fig 7)
1. Guide the threaded end of the needle assembly
into the front of the gun.
2. Install the end cap, aligning its guides with the
holes in the rear of the gun. Install the locknut (D)
loosely.
3. Squeeze the trigger while installing the gasket (B)
and diffuser/seat (A). Torque the diffuser seat to
26–32 ft-lb (35–43 N.m).
10 307614

Service

D
23
C
4. If the gun handle (6) was removed, hand tighten it
into the fluid housing (26); it should fit easily. Only
if necessary, loosen the setscrew (4), align the
handle with the fluid housing and torque the
setscrew to 80–90 in-lb (9–10 N.m).
4
5. Adjust the needle before using the gun. Procedure
below.
6. Be sure the trigger guard and tip guard are
installed before using the gun.
Adjusting the needle
1. Engage the gun safety latch.
2. Hold the gun with the nozzle straight up so the
trigger falls onto the safety latch.
3. With light pressure, hold the trigger against the
latch. Turn the locknut (D) clockwise until there is
enough tension for you to feel and see the trigger
raise slightly off the latch.
4. Turn the adjusting nut 3/4 turn counterclockwise.
5. Connect the fluid hose. Install the tip guard and
prime the system. Trigger the gun and release it.
The fluid flow should stop immediately. Engage the
safety latch and try to trigger the gun. No fluid
should flow. If the gun fails either test, relieve
pressure, disconnect the hose and readjust the
needle.
Engage trigger
1
safety latch
Arrows indicate
2
clockwise turn
Fig 8
(See Fig 8)
1
D
2
01705