Titan RentSpray 450 Owner'S Manual Download

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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.

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.
5. Remove the retaining clip that holds the suction set in the

foot valve. Pull the suction set out of the foot valve.

6. 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. 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 3/4" socket wrench, loosen and remove the outlet

valve retainer from the piston rod.

4. Clean out any debris and

examine the outlet valve retainer
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.

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.).

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

Outlet Valve

Seat

Outlet Valve

Ball

Outlet Cage

Crush Washer

Piston Rod

Foot Valve
Housing

Foot Valve
Seat

Foot Valve
Ball

Bushing

O-Ring

Lower Cage

Lower Seal

Repacking the Fluid Section

1. Remove the foot valve and outlet valve assemblies using

the steps in the “Servicing the Valves” procedure above.

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
connecting rod.

5. Slide the piston rod

out through the
bottom of the pump
block.

6. Loosen and remove

the retainer nut and
piston guide from the
pump block.

7. Remove the upper

and lower packings from the pump block.

8. Clean the pump block and install the new upper and lower

packings. Refer to the illustration below for proper
packing orientation.

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.

IMPORTANT: Never use a wrench on the piston itself.
This could cause damage to the piston and cause leakage.

11. Insert the piston guide into the retainer nut. Thread the

retainer nut into the pump block until it is hand tight.

12. Slide the piston guide tool (included in the repacking kit)

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.

13. Using a wrench, tighten the retainer nut securely.
14. Slide the top of the piston rod into the T-slot on the

connecting rod.

NOTE: Coat the piston guide tool and the piston rod

with grease before inserting them into the
pump block.

NOTE: Use the T-slot on the connecting rod to hold

the piston rod in position while securing the
outlet valve retainer.

Install lower packings

with raised lip and O-ring

facing up.

Install upper packing

with raised lip and O-ring

facing down.