Replacing the Transducer
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. Tilt the sprayer back for easy access to the fluid section.
5. Slide the retaining ring up on the slider assembly to
expose the connecting pin.
6. Push the connecting pin forward through the slider
assembly and piston. The connecting pin will fall into a
recessed area of the gear box housing where it can be
retrieved.
7. Using 3/8” a hex wrench, loosen and remove the two
pump manifold mounting screws.
8. Pull the pump manifold down off of the gear box housing.
9. Remove the four heat sink assembly mounting screws.
Pull back the heat sink assembly for access to the
transducer wire.
10. Follow the transducer wire from the transducer to the
motor electronic control assembly and unplug the wire
from the electronic control assembly.
11. Using a wrench, remove the transducer assembly from
the pump manifold.
12. Thread the new transducer assembly into the pump
manifold. Tighten securely with a wrench.
13. Plug the transducer wire into the motor electronic control
assembly where the old transducer wire was located.
14. Reassemble the pump by reversing steps 1–8.
Make sure the transducer is aligned properly with the hole
in the pump manifold during reassembly. Improper
alignment may cause damage to the transducer o-ring.
Gear Box
Housing
Heat Sink
Assembly
Slider
Assembly
Pump
Manifold
Pump
Manifold
Mounting
Screw
Front
Cover
Front
Cover
Screw
Heat Sink
Assembly
Screw
Transducer
Assembly
Connecting Pin
Retaining Ring
CAUTION
WARNING
10
© SprayTECH. All rights reserved.
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 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. 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 Upright Cart units, remove the return hose from the
hose clip on the siphon tube. Unscrew the siphon tube
from the inlet valve housing.
5. For Low Boy cart units, remove the retaining ring from the
bottom of the inlet valve housing using a snap ring pliers.
Remove the return hose clamp and pull the return hose
from its fitting on the pump manifold. Remove the suction
set assembly.
6. Loosen and remove the high-pressure hose from the
outlet fitting on pump manifold.
Servicing the Valves
The design of the fluid section
allows access to the inlet 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 inlet valve housing
from the pump manifold.
2. Clean out any debris in the
inlet valve housing and
examine the valve housing and
seat. If the seat is damaged,
reverse or replace the seat.
3. Using a 3/8" hex wrench,
loosen and remove the outlet valve retainer from the
piston rod.
4. Clean out any debris and
examine the valve housing
and seat. If the seat is
damaged, reverse or replace the seat.
5. Remove, clean, and inspect the outlet valve cage and
outlet valve ball. Replace if they are worn or damaged.
6. Reassemble the valves by reversing the steps above.
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 Valve
Cage
Nylon Washer
Piston Rod
Outlet Valve
Seal
Inlet Valve
Housing
PTFE
O-Ring
Inlet Valve
Seat
Inlet Valve
Ball
Inlet Valve
Cage
Nylon
Washer
Piston
Bushing
Pump
Manifold
WARNING
