Helix 25
GB
Servicing
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5
8
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4
9
10
11. Clean the upper housing (2) and cylinder (3-5). Inspect
the upper housing and cylinder for damage and replace if
necessary.
12. Place the cylinder upright (1) in a vise by clamping on the
wrench ats (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.
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.
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16. Insert upper support ring (8) on top of the upper packing (5)
17. Thread the upper seal retainer (3) into the cylinder (1).
18. Rotate the cylinder in the vise so that the bottom end is facing
up.
19. Insert the lower packing (Fig. 26) partially into the bottom of
the cylinder with the large beveled edge (12) facing toward
the cylinder (beveled edge will be facing up when the cylinder
is upright).
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20. Push the lower packing assembly (Fig. 24, Item 7) into position
using the lower packing insertion tool (see Fluid Section
AssemblypartslistforlowerpackinginsertiontoolP/N).
Coat the piston insertion tool (i.e. upper packing
pre-form tool) and the piston rod with grease before
inserting them into the cylinder.
21. Place the piston insertion tool over the top of the piston rod
(4).
22. Insert the piston rod (4) into the bottom of the cylinder (1),
through the lower packing assembly (7), through the upper
packing assembly (5), and out through the upper seal retainer
(3).
Make sure the raised lip on the bottom of the lower
packing is fully outside the packing around the
piston rod after insertion of the piston rod.
23. Remove the piston insertion tool from the top of the piston
rod (4).
24. Replace the cylinder (1) back into the uid section clamp on
the gear housing. Make sure to slide the top of the piston rod
extension into the T-slot (9) on the slider assembly (10).
25. Push the lever on the underside of the unit toward the rear of
the sprayer to lock the uid section back into place.
26. Insert the adapter (6) into the bottom of the cylinder (1).
27. Making sure that the bearing ring (Fig. 22, item 9) and O-rings
(Fig. 22, items 7-8) are lubricated and in place, reassemble
the inlet valve assembly and and thread it into the cylinder.
Tighten the inlet valve housing until the o-ring engages,
then continue to tighten until snug. Once snug, tighten an
additional 1/8–1/4 turn.
28. Attach the high-pressure hose to the nipple on the back of the
cylinder and tighten by hand. Do not kink the hose.
i
Make sure the hose does not touch the cart frame. If
it does, reposition the nipple by turning the cylinder
until the hose is clear of the frame and the nipple is
within 45º of the back of the unit.
29. Install front cover.
