Titan IMPACT 740 Mode D'emploi page 12

Repacking the Fluid Section
1. Remove the foot valve assembly
and the lower housing using the
steps in the "Servicing the Valves"
procedure above.
NOTE: The outlet valve does not
need to be disassembled
from the piston rod for
this procedure.
2. Tap the knock-off nut with a
soft hammer so that it turns
counterclockwise and loosens.
3. Turn the fluid section
counterclockwise to remove it
from the gear box housing.
4. Place the upper housing upright in
a vise by clamping on the wrench
flats.
NOTE: Do not over-tighten
the vise. Damage to
the upper housing may
occur.
5. Using a wrench, remove the upper
seal retainer.
6. Slide the piston rod forward until
the piston is out of the T-slot on
the slider assembly.
7. Pull the piston out through the
bottom of the upper housing.
8. Inspect the piston rod for wear and
replace if necessary.
9. Remove the upper and lower
packings from the upper housing.
NOTE: Be careful not to scratch,
score, or otherwise
damage the upper
housing during removal
of the packings.
10. Clean the upper housing. Inspect the upper housing for
damage and replace if necessary.
11. Remove the plastic wrap from the upper packing and pre-
form tool.
IMPORTANT: Cut the plastic wrap with a scissors. Do not cut
plastic wrap with a utility knife as damage can occur to the
O-rings.
12. Slide the upper packing off the sizing/ insertion tool (towards
the tip) and install into the top of the upper housing with the
raised lip on the packing facing down.
13. Insert the spacer on top of the
upper packing.
14. Thread the upper seal retainer into
the upper housing and torque to
25-30 ft. lbs.
15. Pre-form the lower packing using
the lower packing sizing tool
(included in the repacking kit).
16. Insert the lower packing partially
into the bottom of the upper
housing so that the side that has
the o-ring closest to the face of
the packing faces up.
17. Push the lower packing into
position using the lower packing
insertion tool (see Fluid Section
Assembly parts list for lower
packing insertion tool P/N).
18. Place the piston insertion tool
(included in the repacking kit) over the top of the piston rod.
English
Crankshaft
Slider
Assembly
Knock-O
Nut
Upper Seal
Retainer
Spacer
Upper
Packing
Upper
Housing
Lower
Packing
Wear Ring
Piston Rod
Install upper packing
with raised lip
facing down.
Raised Lip
Install lower packing with
the side that has the o-ring
closest to the face of the
packing facing up.
Closer
Top
12
19. Insert the piston rod into the bottom of the upper housing,
through the lower packing, through the upper packing, and
out through the upper seal retainer.
NOTE: When repacking the fluid section, 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.
20. Remove the piston insertion tool from the top of the piston
rod.
21. Slide the top of the piston rod into the T-slot on the slider
assembly.
22. Turn the knock-off nut counterclockwise until it is flush
against the upper housing.
23. Lubricate the threads on the upper housing with anti-seize
compound. Remove the upper housing from the vise.
24. Thread the upper housing into the gear box housing, turning
clockwise.
25. Continue to turn the upper housing clockwise until the knock-
off nut is flush against the gear box housing.
NOTE: If the nipple on the upper housing does not face
the back of the unit, turn the upper housing
counterclockwise until the nipple faces the back of
the unit. Do not turn the upper housing more than
one full turn.
26. Once the nipple is positioned, turn the knock-off nut
clockwise until it contacts the gear box housing.
27. Tap the knock-off nut with a soft hammer to tighten it against
the gear box housing.
28. Making sure that the Viton o-ring and PTFE back-up ring are
lubricated and in place, thread the lower housing into the
upper housing. Using two wrenches, hold the upper housing
at the wrench flats with one wrench and tighten the lower
housing with the other.
29. Attach the high-pressure hose to the nipple on the back of the
housing and tighten with a wrench. Do not kink the hose.
NOTE: For low rider units, make sure the hose does not
touch the cart frame. If it does, reposition the nipple
by turning the upper housing until the hose is clear
of the frame and the nipple is within 45º of the back
of the unit.
30. Making sure that the Viton o-ring and PTFE back-up ring are
lubricated and in place, reassemble the foot valve assembly
and and thread it into the lower housing. Tighten securely.
31. Thread the siphon tube/siphon set into the foot valve and
tighten securely. Make sure to wrap the threads on the down
tube/siphon tube adapter with PTFE tape before assembly.
32. Replace the return hose into the clamp on the siphon tube.
33. Place the front cover on the gearbox housing and secure in
position using the four front cover screws.
34. Turn on the sprayer by following the procedure in the
"Operation" section of this manual and check for leaks.
NOTE: Repacking kit P/N 805-1010 is available. For best
results use all parts supplied in this kit.
© Titan Tool Inc. All rights reserved.