Repacking the Fluid Section
1. Remove the inlet valve
and outlet valve
assemblies using the
steps in the “Servicing
the Valves” procedure
above.
2. Using a 11/16” open-end
wrench, loosen and
remove the fluid hose
from the fitting on the
back of the fluid section.
3. Using a 3/8” hex wrench,
remove the two socket
screws that secure the
fluid section to the pump
housing.
4. Remove the fluid section
by pulling it straight down
from the pump housing
until the dowel pins on the
pump housing disengage
form the fluid section
housing. Then, pull the
fluid section forward to
disengage the piston from
the T-slot on the slider
assembly.
5. Slide the piston rod out
through the bottom of the
fluid section housing.
6. Using a wrench, loosen
and remove the retainer
nut and piston guide from
the fluid section housing.
7. Remove the upper and
lower packings from the
fluid section housing.
8. Clean the fluid section housing thoroughly
9. Locate the new upper and lower packing assemblies. .
Remove the piston insertion tool from the upper packing
and the seal sizing tool from the lower packing.
10. Pack the areas between the
packing lips with grease
(included in repacking kit).
Lubricate the o-rings on the
exterior of the packings with
grease.
11. Insert the upper packing
assembly into the top of the
fluid section housing with the raised lip facing down into
the housing.
12. Insert the lower packing
assembly into the bottom of the
fluid section housing with the
large beveled edge facing
toward the housing (beveled
edge will be facing up when
the housing is upright).
13 Inspect the piston rod for wear
and replace if necessary.
Install lower packing so
large beveled edge will
be facing up when the fluid
section housing is upright.
Large Beveled Edge
Install upper packing
with raised lip
facing down.
Raised Lip
NOTE: Be careful not to scratch, score, or otherwise
damage the inside of the fluid section housing
during removal of the packing assemblies.
Slider
Assembly
Retainer
Nut
Piston
Guide
Fluid
Section
Housing
Upper
Packing
Lower
Packing
Socket
Screw
Piston
Rod
Fitting
T-Slot
NOTE: The factory-installed packings are red in color.
The replacement packings in the packing
replacement kit are white.
14 Reassemble the outlet valve assembly into the piston rod
using the new o-ring, outlet valve seal, and outlet valve ball
that came with the repacking kit. Apply blue Loctie to the
threads of the outlet valve retainer. Torque the outlet valve
retainer to 150 in./lbs.
Never use a wrench on the piston rod itself. This could
cause damage to the piston and cause leakage.
15. Insert the new piston guide into the retainer nut. Thread
the retainer nut into the fluid section housing until it is
hand tight.
16. Slide the piston guide tool (included in the repacking kit)
over the top of the piston rod.
17. Insert the piston rod into the bottom of the fluid section
housing, 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 fluid section housing.
18. Using a wrench, tighten the retainer nut. Torque to 550-
600 in./lbs.
19. Slide the top of the piston rod into the T-slot on the slider
assembly.
20. Position the fluid section underneath the pump housing by
lining up the pump housing dowel pins with their
respective holes in the top of the fluid section housing.
Push the fluid section up towards the pump housing,
engaging the dowel pins, until the fluid section housing
rests against the pump housing.
21. Insert the two socket screws that secure the fluid section
to the pump housing and alternately snug, tighten, and
torque the screws to 400-440 in./lbs.
22. Reassemble the inlet valve using the new inlet valve seal,
o-ring, and inlet valve ball. Thread the inlet valve
assembly into the fluid section housing and torque to 350-
400 in./lbs.
23. Position the front cover over the pump housing. Secure
the front cover using the four front cover screws.
24. Using a 11/16” open-end wrench, attach the fluid hose to
the fitting on the back of the fluid section. Tighten
securely.
25. Turn on the sprayer by following the procedure in the
“Operation” section of this manual and check for leaks.
NOTE: Repacking kit P/N 0509909 is available. For
best results use all parts supplied in this kit.
NOTE: Make sure the raised lip on the bottom of the
lower packing assembly is fully outside the
packing around the piston rod after insertion
of the piston rod.
NOTE: Coat the piston guide tool and the piston rod
with grease before inserting them into the fluid
section housing.
CAUTION
NOTE: Use the T-slot on the slider assembly to hold
the piston rod in position while securing the
outlet valve retainer.
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