Remove Fluid Head Component - Graco GUSMER D Series Instructions Manual

Remove Fluid Head Component

NOTE: Refer to Figure 2 to view Fluid Head
components.
1. Perform Pressure Relief Procedure (page 13) and
Clean Spray Gun, page 16.
2. Remove air cap by hand, turning it
counterclockwise.
3. Remove screen screw assembly. Flush and place in
gun cleaner.
4. Remove check valves. Flush and place in gun
cleaner.
5. Flush screen screw and check valve ports.
6. Remove spring retainer case by firmly grasping
knob of case. Push in and rotate counterclockwise
to remove from air cylinder. Pull spring out of air
cylinder.
7. Loosen felt wiper retainer 2-3 turns. DO NOT
REMOVE.
8. Remove valving rod. Push back firmly on piston rod
until end of valving rod stop bar emerges from
cylinder.
9. Remove gun block from frame.
10. Unscrew felt wiper assembly from rear of mixing
chamber. Keep rear of mixing chamber in upright
position to prevent possible loss of internal chamber
parts. Ensure brass retaining sleeve is not stuck to
felt wiper. Place wiper assembly in gun cleaner.
11. Remove mixing chamber. Hold gun block in one
hand with chamber tip pointing into your palm. Insert
mixing chamber knockout tool into rear of gun block
and tap with hammer until chamber ejects. Place
chamber in gun cleaner.
Mixing Chamber
Chamber
Knockout
Tool
F . 22 Mixing Chamber Removal
IG
311320K
Matching tapers on mixing chamber and center hole in
gun block are machined to an exact fit to hold
chambers in place and create a leak-proof seal. When
handling or cleaning these parts be careful not to
damage finish. Do not use metal tools to clean these
parts.
12. Remove closure screw in top of gun block. Place
screw in gun cleaner and clean entire gun using
appropriate cleanout tools and brass brushes. Then
flush thoroughly with gun cleaner.
13. Disassemble check valve assemblies.
Screw
F . 23 Check Valves
IG
a. Remove ball and spring assembly. Hold ball
and unscrew assembly. If dirt or material
build-up prevents complete removal of the
spring, screw it back in. Soak assembly in gun
cleaner and try to remove it again. If ball and
spring assembly cannot be removed
undamaged, replace it.
NOTICE
Sleeve
Ball and Spring
Repair
19