Servicing The Fluid Section - Titan Skid Basic Owner's Manual

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. For High Rider cart units, remove the return hose from the
hose clip on the siphon tube. Unscrew the siphon tube
from the foot valve housing.
5. For Skid and Low Rider units, 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.
6. 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. Using a wrench, loosen and
remove the foot valve housing
from the pump block.
2. 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.
3. 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.
4. Clean out any debris and
examine the outlet valve housing
and seat. If the seat is damaged,
reverse or replace the seat.
5. 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.
6. 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.).
Repacking the Fluid Section
1. Remove the foot valve assembly using the steps in the
"Servicing the Valves" procedure above.
NOTE: The outlet valve does not need to be
2. Using 3/8" a hex
wrench, loosen and
remove the two pump
block mounting
screws.
3. Pull the pump block
down approximately
1/2" from the pump
housing.
4. Slide the pump block
and piston rod
forward until the
piston rod is out of
the T-slot on the
slider assembly.
5. Slide the piston rod
out through the
bottom of the pump
block
6. Loosen and remove
Pump Block
the retainer nut and
Bushing
piston guide from the
pump block.
Foot Valve
Seal
7. Remove the upper
and lower packings
Inlet Cage
from the pump block.
Foot Valve
8. Clean the pump block
Ball
and install the new upper and lower packings. Refer to
the illustration below for proper packing orientation.
Foot Valve
Seat
Install upper packing
Teflon
with raised lip and O-ring
O-Ring
Foot Valve
Housing
9. Inspect the piston rod for wear and replace if necessary.
10. Reassemble the outlet valve assembly into the piston rod.
Tighten the outlet valve retainer with a wrench until secure.
Piston Rod
NOTE: Use the T-slot on the slider assembly to hold
Outlet Cage
Crush
Washer
Outlet Valve
IMPORTANT: Never use a wrench on the piston itself.
Ball
This could cause damage to the piston and cause leakage.
Outlet Valve
11. Insert the piston guide into the retainer nut. Thread the
Seat
retainer nut into the pump block until it is hand tight.
Outlet Valve
12. Slide the piston guide tool (included in the repacking kit)
Retainer
over the top of the piston rod and insert the piston rod
through the bottom of the pump block. Using a rubber
mallet, tap the bottom of the piston rod lightly until the
piston rod is in position in the pump block.
NOTE: Coat the piston guide tool and the piston rod
13. Using a wrench, tighten the retainer nut securely.
14. Slide the top of the piston rod into the T-slot on the slider
assembly.
15. Position the pump block underneath the pump housing
and push up until it rests against the pump housing.
16. Thread the pump block mounting screws through the
pump block and into the pump housing. Tighten securely.
12
disassembled from the piston rod for this
procedure.
T-Slot
facing down.
O-Ring
Raised Lip
the piston rod in position while securing the
outlet valve retainer.
with grease before inserting them into the
pump block.
© Titan Tool Inc. All rights reserved.
Slider
Assembly
Retainer
Nut
Piston
Guide
Upper
Packing
Pump
Block
Pump Block
Mounting
Screw
Lower
Packing
Piston Rod
Install lower packing
with the beveled
edge facing up.
Beveled Edge