Replacing the PRIME/SPRAY Valve
Perform the following procedure using PRIME/SPRAY valve
replacement kit P/N 800-915.
1. Push the groove pin out of the valve handle.
2. Remove the valve handle and the cam base.
3. Using a wrench, loosen and remove the valve housing
assembly.
4. Make sure the gasket is in place and thread the new valve
housing assembly into the filter block. Tighten securely
with a wrench.
5. Place the cam base over the valve housing assembly.
Lubricate the cam base with grease and line up the cam
with the filter block using the dowel pin.
6. Line up the hole on the valve stem with the hole in the
valve handle.
7. Insert the groove pin into the valve handle and through
the valve stem to secure the valve handle in position.
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 unit.
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 clamp on the siphon
tube.
5. Unscrew the siphon tube/siphon set from the foot valve.
6.
Loosen and remove the high-pressure hose from the
nipple on the back of the upper housing of the fluid
section.
Gasket
Dowel Pin
Cam Base
Valve Stem
Filter
Housing
Valve Housing
Assembly
Valve
Handle
Groove Pin
12 © Titan Tool Inc. All rights reserved.
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: During reassembly, make sure the Viton o-rings
and the PTFE 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.
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
PTFE
Back-Up
Ring
Foot Valve
Seat
Foot Valve
Ball
Foot Valve
Cage
Lower
Housing
Upper
Housing
