Piston - Graco Fusion CS20F1 Instructions - Parts Manual

Repair
8. Liberally lubricate o-rings (44e, 44f) and
carefully reinstall in fluid housing (F). Use
hex nut driver to tighten.
9. Attach fluid manifold (M). Connect air (D).
Return gun to service.

Piston

1. Follow Pressure Relief Procedure, page
17
2. Disconnect air (D) and remove fluid mani-
fold (M).
M
F . 60
IG
3. Remove Front End, page 36.
4. Unscrew variable flow adjustment knob (X)
and inspect o-ring (3a).
F . 61
IG
42
5. Push piston shaft to remove piston (4b).
Inspect piston o-ring (4c) and shaft o-rings
(4a).
F . 62
IG
6. Remove dosing piston.
a. Use supplied screw driver to remove
b. Use screw driver to push dosing piston
D
7. Clean and inspect o-rings on dosing piston
(4e). Clean dosing bore in piston (4b) with
TI11330a
a nylon brush and compatible solvent.
8. Lubricate dosing piston (4e) o-rings with
ClearShot Liquid prior to reassembly.
9. Liberally lubricate piston o-ring (4c) and
lightly lubricate shaft o-rings (4a).
10. Reinstall retaining ring (4g). Press it into
X
groove of dosing piston (4e).
3a
TI12100a
spiral retaining ring (4g).
(4e) out back of piston (4b) through
access hole on front side.
4b
4c
4a
TI12101a
312666P