Replacing The Prime/Spray Valve; Servicing The Fluid Section - Titan 740i Owner's Manual

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 pump block. Tighten securely
with wrench.
5. Place the cam base over the valve housing assembly.
Lubricate the cam base with grease and line up the cam
with the pump 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.
Pump Block
Dowel Pin
Valve Housing
Assembly
Gasket
Valve Stem
Cam Base
Valve
Handle
Groove Pin

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. Stop the sprayer at the bottom of its stroke so that the
piston is in its lowest position. 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!
3. For High Rider units, remove the return hose from the
clamp on the siphon tube. Unscrew the siphon tube from
the foot valve housing.
4. For Low Rider units, remove the retaining clip from the
bottom of the foot valve housing. Unscrew the return
hose from the pump block and remove the suction set
assembly.
5. Tilt the pump back for easy access to the fluid section.
Servicing the valves
The design of Titan's 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 pump
block.
2. Remove the lower cage, foot
valve ball, foot valve seat, and
o-ring from the foot valve housing.
3. Clean out any debris in the foot valve housing and
examine the valve housing and seat. If the seat is
damaged, reverse or replace the seat.
4. Remove the adapter from the pump block.
5. Using a 3/8" hex wrench, loosen and remove the outlet
valve retainer from the 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.
6. Remove the upper seal, upper
cage, nylon washer, outlet valve
ball, and outlet valve seat from
the outlet valve retainer.
7. Clean out any debris and
examine the outlet valve retainer
and outlet valve seat. If the seat is damaged, reverse or
replace the seat.
8. Clean and inspect the upper cage and outlet valve ball.
Replace if they are worn or damaged.
9. Reassemble the valves by reversing the steps above.
NOTE: During reassembly, make sure the o-ring
between the pump block and foot valve housing
is lubricated with grease and in position.
10
Pump Block
Adapter
Lower Cage
Foot Valve
Ball
Foot Valve
Seat
O-Ring
Lower Seal
Foot Valve
Housing
Piston Rod
Upper Seal
Upper Cage
Nylon Washer
Outlet Valve
Ball
Outlet Valve
Seat
Outlet Valve
Retainer
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