Graco HydroShield Instructions Manual page 103

Reassemble Reassemble the Reassemble the the Bottom Bottom Housing Bottom
Isolation Isolation Valve Isolation Valve Valve
Use this procedure after replacing the seals
in the lower piston housing as described in
Service the Bottom Piston Housing, page
This procedure requires the piston tool (111). See
Isolation System, page
NOTICE
NOTICE NOTICE
Assembly of the piston (211) without the use of the
piston tool (111) will damage U-cups within the
housing (201).
1. Replace the U-cup spacer (206) and the packing
U-cup (204):
a. On the smaller side of the U-cup spacer
(206) is a recessed groove that helps align
the packing U-cup (204). Snap or set the
packing U-cup (204) into the groove on the
U-cup spacer (206)
b. Grease around the lip of the seal (204) and
pop, seal side first, into place in the housing
(201).
2. Grease around the o-ring (208) and screw into
the housing (201). Tighten with a 15/16 inch
socket until the retainer (202) bottoms out.
3. Insert the piston tool (111) into the piston (211).
Grease the sides of the tool, especially the top,
so that it can be pulled past the U-cups in the
housing assembly (201) more easily.
3A7370C
Housing of of of the Housing the the
100.
119.
4. Together, insert the piston tool (111) and piston
(211) into the retainer (202) on the housing (201).
Push the piston (211) until the tool comes through
the housing (201) and the piston (211) is in place.
Figure 46 Piston Tool Through Lower Housing
Note
If the piston tool (111) and piston (211)
come apart within the housing (201), pull
the piston tool (111) through the housing.
Pull the piston (211) back out. Join the
parts and try again.
5. In the piston cap (216), grease the sides and the
o-ring (230).
6. Insert the spring (215) into the piston cap (216).
7. Screw the piston cap (216) onto the housing
(201). Push forward to overcome the force of the
spring. Tighten until the piston cap (216) bottoms
out.
Note
Be careful not to cross threads while
assembling.
Repair
103