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11
1. Using a wrench, loosen and remove the inlet valve
housing from the pump manifold.
2. Clean out any debris in the inlet valve housing and
examine the valve housing and seat. If the seat is
damaged, reverse or replace the seat.
3. Using a 5/16” hex wrench, loosen and remove the outlet
valve retainer from the piston rod.
Outlet Valve
Retainer
Outlet Valve
Seat
Outlet Valve
Ball
Outlet Valve
Cage
Piston Rod
NOTE: always service the
outlet valve with the
piston rod attached
to the pump. This will
prevent the piston rod
from rotating during
disassembly of the
outlet valve.
4. Clean out any debris and
examine the valve housing
and seat. If the seat is
damaged, reverse or replace the seat.
5. Remove, clean, and inspect the outlet valve cage and
outlet valve ball. Replace if they are worn or damaged.
6. Reassemble the valves by reversing the steps above.
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.
Slider Assembly
Connecting Pin
Retaining Ring
Retainer Nut
Piston Guide
Upper Packing
Assembly
Pump Manifold
Pump Manifold
Mounting Screw
Piston Rod
Lower Packing
Assembly
Spacer
2. Slide the retaining
ring up on the slider
assembly to expose
the connecting pin.
3. Push the connecting
pin forward through
the slider assembly
and piston. The
connecting pin will
fall into a recessed
area of the gear box
housing where it can
be retrieved.
4. Using 3/8” a hex
wrench, loosen and
remove the two pump
manifold mounting
screws.
5. Pull the pump manifold
down off of the gear
box housing.
6. Slide the piston rod out
through the bottom of
the pump manifold.
7. Loosen and remove
the retainer nut and
piston guide from the
pump manifold.
8. Remove the upper and
lower packings from
the pump manifold.
9. Clean the pump
manifold and install
the new upper and
lower packings. Refer to the illustration below for proper
packing orientation.
Install lower packings
with raised lip and O-ring
facing up.
Install upper packing
with raised lip and O-ring
facing down.
O-Ring
O-Ring
Raised Lip
Raised Lip
10. Inspect the piston rod for wear and replace if necessary.
11. Insert the piston guide into the retainer nut. Thread the
retainer nut into the pump manifold until it is hand tight.
12. Slide the piston guide tool (included in the repacking kit)
over the top of the piston rod and insert the piston rod
through the bottom of the pump manifold. Using a rubber
mallet, tap the bottom of the piston rod lightly until the
piston rod is in position in the pump manifold.
NOTE: coat the piston guide tool and the piston rod
with grease before inserting them into the pump
manifold.
13. Using a wrench, tighten the retainer nut securely.
14. Position the pump block underneath the pump housing
and push up until it rests against the pump housing.
When the connecting pin hole on the piston rod lines up
with the hole in the slider assembly, insert the connecting
pin.
15. Slide the retaining ring down over the connecting pin.
IMPORTaNT: Make sure the transducer is aligned properly
with the hole in the pump manifold during reassembly.
Improper alignment may cause damage to the transducer
gasket.
16. Thread the pump manifold mounting screws through the
pump manifold and into the gear box housing. Tighten
securely.
17. Reassemble the inlet valve assembly into the pump
manifold.
18. Insert the elbow on the suction set assembly into the
bottom of the inlet valve housing. Push the retaining ring
up into the groove inside the inlet valve housing to secure
the suction set assembly in position. Push the return hose
onto the return hose fitting on the pump manifold and
secure in position with the return hose clamp.
19. Place the front cover on the gear box housing and secure
in position using the four front cover screws.
20. Turn on the sprayer by following the procedure in the
“Operation” section of this manual and check for leaks.
NOTE: Repacking kit P/N 0551533 is available. For best
results use all parts supplied in this kit.
