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15
Repacking the Fluid Section
1. Remove the foot valve assembly 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.
Retainer Nut
Piston Guide
Upper Packing
Assembly
Pump Manifold
Pump Manifold
Mounting Screw
Piston Rod
Lower Packing
Assembly
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. Inspect the piston rod for wear and replace if necessary.
11. Insert the upper packing into the top of the pump block with
the raised lip on the packing facing down.
12. Insert the piston guide into the retainer nut. Thread the
retainer nut into the pump block until it is hand tight.
13. Pre-form the lower packing using the lower packing sizing
tool (included in the repacking kit).
14. 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.
Large Beveled Edge
Install upper packing
with raised lip
facing down.
Raised Lip
Install lower packing
with large beveled
edge facing up.
15. 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).
16. Inspect the piston rod for wear and replace if necessary.
NOTE: coat the piston guide tool and the piston rod with
grease before inserting them into the pump block.
17. Place the piston insertion tool (included in the repacking kit)
over the top of the piston rod.
18. 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.
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.
19. Remove the piston insertion tool from the top of the piston
rod.
20. Using a wrench, tighten the retainer nut into the pump block.
Torque to 300-360 in. lbs.
21. Slide the top of the piston rod into the T-slot on the slider
assembly.
22. Position the pump block underneath the gear box housing
and push up until it rests against the gear box housing.
ImPORTANT: 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.
23. Thread the pump block mounting screws through the pump
block and into the gear box housing. Torque to 400-440 in.
lbs.
24. Reassemble the foot valve assembly into the pump block.
NOTE: During reassembly, make sure the o-ring between
the pump block and foot valve housing is lubricated
with grease and in position.
25. 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.
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 0555960 is available. For best
results use all parts supplied in this kit.
