Repacking the Fluid Section
1. Remove the foot valve assembly using the steps in the
“Servicing the Valves” procedure above.
2. Using 3/8” a hex
wrench, loosen
and remove the
two pump block
mounting screws.
3. Pull the pump
block down
approximately 1/2”
from the gear box
housing.
4. Slide the pump
block and piston
rod forward until
the piston rod is
out of the T-slot on
the slider
assembly.
5. Slide the piston
rod out through the
bottom of the
pump block
6. Loosen and
remove the
retainer nut and piston guide from the pump block.
7. Remove the upper and lower packings from the pump
block.
8. Clean the pump block.
9. Locate the new upper and lower packings and pack the
areas between the packing lips with grease. Lubricate the
o-rings on the exterior of the packings with grease.
10. Insert the upper packing into the
top of the pump block with the
raised lip on the packing facing
down.
11. Insert the piston guide into the
retainer nut. Thread the retainer
nut into the pump block until it is
hand tight.
12. Pre-form the lower packing using the lower packing sizing
tool (included in the repacking kit).
13. Insert the lower packing partially
into the bottom of the pump
block so that the side that has
the o-ring closest to the face of
the packing faces up.
14. 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).
15. Inspect the piston rod for wear
and replace if necessary.
16. Place the piston insertion tool (included in the repacking
kit) over the top of the piston rod.
NOTE: Coat the piston insertion tool and the piston
rod with grease before inserting them into the
pump block.
Install lower packing with
the side that has the o-ring
closest to the top of the
packing facing up.
Closer
Top
Install upper packing
with raised lip and
o-ring facing down.
O-Ring
Raised Lip
Slider
Assembly
Retainer
Nut
Piston
Guide
Upper
Packing
Pump
Block
Lower
Packing
Pump Block
Mounting
Screw
Piston Rod
T-Slot
Transducer
Gasket
NOTE: The outlet valve does not need to be
disassembled from the piston rod for this
procedure.
NOTE: The factory-installed packings are black in
color. The replacement packings in the
packing replacement kit are white.
17. Insert the piston rod into the bottom of the pump block,
through the lower packing, through the upper packing, and
out through the retainer nut. Using a rubber mallet, tap
the bottom of the piston rod lightly until the piston rod is in
position in the pump block.
18. Remove the piston insertion tool from the top of the piston
rod.
19. Using a wrench, tighten the retainer nut into the pump
block. Torque to 25-30 ft. lbs.
20. Slide the top of the piston rod into the T-slot on the slider
assembly.
21. Position the pump block underneath the gear box housing
and push up until it rests against the gear box housing.
Make sure the transducer is aligned properly with the hole
in the pump block during reassembly. Improper alignment
may cause damage to the transducer gasket.
22. Thread the pump block mounting screws through the
pump block and into the gear box housing. Tighten
securely.
23. Reassemble the foot valve assembly into the pump block.
24. For High Rider units, thread the siphon tube into the foot
valve housing and tighten securely. Make sure to wrap
the threads on the siphon tube with
PTFE
tape before
assembly. Replace the return hose into the clamp on the
siphon tube.
25. For Low Rider units, insert the elbow on the suction set
assembly into the bottom of the foot valve housing.
Position the retaining clip up into the foot valve housing to
secure the suction set assembly.
26. Thread the return hose into the pump block and tighten
securely.
27. Place the front cover on the gear box housing and secure
in position using the four front cover screws.
28. Turn on the sprayer by following the procedure in the
“Operation” section of this manual and check for leaks.
NOTE: Repacking kit P/N 800-450 is available. For
best results use all parts supplied in this kit.
NOTE: During reassembly, make sure the o-ring
between the pump block and foot valve housing
is lubricated with grease and in position.
CAUTION
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.
© Titan Tool Inc. All rights reserved.
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