10
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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. Using a wrench, remove the transducer assembly from the
pump manifold.
10. Thread the new transducer assembly into the pump
manifold. Tighten securely with a wrench.
11. Reassemble the pump by reversing steps 1–8.
IMPORTaNT: 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
Slider
Assembly
Pump
Manifold
Pump
Manifold
Mounting
Screw
Front
Cover
Front
Cover
Screw
Transducer
Assembly
Connecting Pin
Retaining Ring
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.
Inlet Valve
Housing
O-Ring
Inlet Valve
Seat
Inlet Valve
Ball
Inlet Valve
Cage
Nylon
Washer
Piston
Bushing
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.
