Servicing the Fluid Section
Use the following procedures to service the valves and repack
the fluid section. Perform the following steps before
performing any maintenance on the fluid section.
1. Loosen and remove the four front cover screws. Remove
the front cover.
2. Position the crankshaft/slider assembly at the bottom,
dead-center of its stroke so that the connecting pin and
retaining ring are visible below the slider assembly. This
is done by turning the sprayer on and off in short bursts
until the connecting pin is visible below the slider housing.
3. Turn off and unplug the sprayer.
Before proceeding, follow the Pressure Relief Procedure
outlined previously in this manual. Additionally, follow all
other warnings to reduce the risk of an injection injury,
injury from moving parts or electric shock. Always
unplug the sprayer before servicing!
4. Remove the return hose from the hose clamp on the fluid
section.
5. Loosen and remove the high-pressure hose from the
fitting on the upper housing of the fluid section.
Servicing the Valves
The design of the fluid section
allows access to the foot valve and
seat as well as the outlet valve and
seat without completely
disassembling the fluid section. It
is possible that the valves may not
seat properly because of debris
stuck in the foot valve seat or outlet
valve seat. Use the following
instructions to clean the valves and
reverse or replace the seats.
1. Loosen and remove the foot
valve housing from the lower
housing.
2. Clean out any debris in the
foot valve housing and
examine the housing and the
foot valve seat. If the seat is
damaged, reverse or replace
the seat.
3. Using two wrenches, hold the
upper housing at the wrench flats with one wrench and
loosen the lower housing with the other. Remove the
lower housing.
4. Using a 3/4” wrench, loosen and
remove the outlet valve retainer
from the piston rod.
5. Clean out any debris and
examine the retainer and outlet
valve seat. If the seat is
damaged, reverse or replace the
seat.
6. Remove, clean, and inspect the
outlet valve cage and outlet
valve ball. Replace if they are
worn or damaged.
7. Reassemble the valves by reversing the steps above.
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.
Outlet Valve
Retainer
Nylon
Washer
Outlet Valve
Seat
Outlet Valve
Ball
Outlet Valve
Cage
Outlet Valve
Seal
Piston Rod
Upper
Housing
Lower
Housing
Foot Valve
Housing
Viton
O-Ring
O-ring
Teflon
Back-Up
Ring
Foot Valve
Seat
Foot Valve
Ball
Foot Valve
Cage
Lower
Housing
Upper
Housing
WARNING
12
© Titan Tool Inc. All rights reserved.
Repacking the Fluid Section
1. Remove the foot valve
assembly and the lower
housing using the steps in the
“Servicing the Valves”
procedure above.
2. Turn the upper housing
counterclockwise to loosen it
from the cylinder.
3. Slowly pull down the upper
housing just far enough to
expose the extension slider
and the connecting pin that
connects the piston rod to the
extension slider.
4. Push the connecting pin out of
the extension slider and piston
rod and remove the piston
rod/upper housing.
5. Place the upper housing
upright in a vise by clamping
on the wrench flats.
6. Using a wrench, remove the
upper seal retainer.
7. Slide the piston rod 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.
10. Clean the upper housing. Inspect the upper housing for
damage and replace if necessary.
11. 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.
12. Insert the upper packing 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).
Install upper packing
with raised lip
facing down.
Raised Lip
NOTE: Be careful not to scratch, score, or otherwise
damage the upper housing during removal of
the packings.
NOTE: Do not over-tighten
the vise. Damage to
the upper housing
may occur.
NOTE: The outlet valve does
not need to be
disassembled from
the piston rod for this
procedure.
Cylinder
Connecting
Pin
Extension
Slider
Upper Seal
Retainer
Spacer
Upper
Packing
Lower
Packing
Upper
Housing
Piston Rod
Wear Ring
NOTE: During reassembly, make sure the Viton o-rings
and the Teflon back-up rings between the upper
housing and lower housing as well as between
the lower housing and the foot valve housing
are lubricated with grease and in position.
