Replacing The Prime/Spray Valve; Servicing The Fluid Section - Titan IMPACT 440 Manuel D'entretien

Replacing the PRIME/SPRAY Valve

Perform the following procedure using PRIME/SPRAY valve
replacement kit P/N 700-258
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.
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.
Valve housing
assembly
English
Pump block
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.
3. Perform the Pressure Relief Procedure 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. Unscrew the return hose assembly from the pump block.
Remove the retaining clip from the bottom of the foot valve
housing. Remove the siphon assembly.
5. Tilt the sprayer back for easy access to 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. Remove the pusher stem clip
and slide the pusher stem
housing from the foot valve
housing.
2. Using a wrench, loosen and
remove the foot valve housing
from the pump block.
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. Using a 5/16" 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.
5. Clean out any debris and examine the
outlet valve housing and seat. If the
seat is damaged, reverse or replace the
seat.
6. Remove, clean, and inspect the outlet cage, crush washer, and
outlet valve ball. Replace if they are worn or damaged.
NOTE: The outlet cage always must be used with the
crush washer. They are included together in the
repacking kit as assembly P/N 704-642.
7. Reassemble the valves by reversing the steps above.
NOTE: During reassembly of the outlet valve, apply one
drop of Loctite (included in the repacking kit) to
the threads of the outlet valve retainer before
threading it into the piston rod. Then, torque the
retainer to 144 in./lbs. (12 ft./lbs.).
6
Pump
block
Bushing
Foot valve
seal
Inlet cage
Foot valve
ball
Foot valve
seat
PTFE
O-ring
Foot valve
O-ring
Pusher
stem
housing
Piston rod
Outlet cage
Crush
washer
Outlet valve
ball
Outlet valve
seat
Outlet valve
retainer
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