34
ServiCing
HELIX
9.6
pAcKINgS
1. Remove inlet valve housing in accordance with the steps
in Section 9.5.
2. It is not necessary to remove the outlet valve.
3. Pull the lever on the underside of the sprayer toward the
front of the sprayer. This will un-clamp the entire fluid
section.
4. Slide the fluid section forward to remove it from the gear
housing.
5. Place the fluid section cylinder upright in a vise by clamping
on the wrench flats (Fig. 24, Item 2).
Attention
Do not over-tighten the vise. Damage to the
cylinder may occur.
6. Using a wrench, remove the upper seal retainer (Fig. 24,
Item 3).
7. Slide the piston rod (4) out through the bottom of the
cylinder (1).
8. Inspect the piston rod for wear and replace if necessary.
9. Remove the upper support ring (8) and upper packing
assembly (5) from the top of the cylinder (1).
10. Remove the adapter (6) and lower packing assembly (7)
from the bottom of the cylinder.
Attention
Be careful not to scratch, score, or otherwise
damage the cylinder during removal of the
packings.
2
1
3
5
8
6
7
4
9
10
11. Clean the cylinder (1). Inspect the cylinder for damage and
replace if necessary.
12. Place the cylinder upright (1) in a vise by clamping on the
wrench flats (2).
13. Locate the new upper and lower packings and remove the
pre-form tools. Save the upper packing pre-form tool for
use as the piston insertion tool later in this procedure.
i
Do not remove the pre-form tools from the upper
and lower packings until immediately before
they are installed into the cylinder.
14. Lubricate upper packing (5) and lower packing (7) with
machine grease.
15. Insert upper packing (Fig. 25) with O-ring and protruding
lip (11) downward.
11
