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English
10
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Replacing the Potentiometer
Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. use Titan ESD
wrist strap P/N 0507958 or equivalent when working
on electronic pressure control.
1. Perform the Pressure Relief Procedure.
2. Pry off the pressure control knob cap to expose the knob
tension nut.
3. Turn the pressure control knob fully counterclockwise to the
minimum pressure setting.
4. Using a 5/16” socket, loosen the tension nut in the center of
the knob. Remove the knob.
5. Using a Phillips screwdriver, remove the four screws that
secure the electronic pressure control (EPC) assembly to the
EPC housing. Carefully remove the EPC assembly from the
housing. Gently move the assembly away from the sprayer
and allow the assembly to hang from the housing.
EPC
Housing
Pressure Control Knob
Seal Nut
Cap
EPC
Board
EPC
Assembly
EPC
Assembly
Screw
Potentiometer
6. Hold the potentiometer inside the EPC housing while using
a 1/2” thin wall socket to remove the seal nut that secures
the potentiometer to the mounting plate. Remove the
potentiometer from the EPC housing.
7. Carefully remove the potentiometer wires from their
connection point on the EPC board.
8. Insert the stem of the new potentiometer through the hole in
the mounting plate from inside the EPC housing. Position the
protruding tab on the potentiometer face into the hole on the
underside of the mounting plate (the wires will face the open
side of the EPC housing).
9. Thread the seal nut onto the threaded portion of the stem and
tighten using a 1/2” thin wall socket.
ImPORTANT: Do not over-tighten the seal nut.
10. Turn the potentiometer stem fully counterclockwise.
11. Place the pressure control knob on the potentiometer stem
with the indicator tab resting at the “minimum pressure” tab
on the mounting plate.
12. Tighten the knob tension nut using a 5/16” socket.
ImPORTANT: Do not over-tighten the knob tension nut. Over-
tightening will damage the potentiometer.
13. Connect the potentiometer wires to the EPC board. The
protruding tab on the EPC board connector will mate with the
slot on the potentiometer wires connector. The connector
on the end of the potentiometer wires and the connector
on the EPC board will mate only one way. Do not force the
connectors together.
14. Carefully place the EPC assembly over the EPC housing taking
care not to pinch any wires.
15. Install the four screws that secure the EPC assembly to the EPC
housing. Tighten securely.
Replacing the Sprayer ON/OFF Switch
Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. use Titan ESD
wrist strap P/N 0507958 or equivalent when working
on electronic pressure control.
1. Perform the Pressure Relief Procedure.
2. Using a Phillips screwdriver, remove the four screws that
secure the electronic pressure control (EPC) assembly to the
EPC housing. Carefully remove the EPC assembly from the
housing. Gently move the assembly away from the sprayer
and allow the assembly to hang from the housing.
3. Locate the bottom of the sprayer ON/OFF switch inside the
EPC housing.
EPC
Housing
Sprayer ON/OFF
Switch
EPC
Board
EPC
Assembly
EPC
Assembly
Screw
4. Disconnect the switch wires from the sprayer ON/OFF switch.
Remember the locations of each of the two wires (label the
wires, if necessary).
5. Depress the mounting tabs on each corner of the sprayer ON/
OFF switch inside the EPC housing and remove the switch
through the top of the housing.
6. Snap the new sprayer ON/OFF switch into the switch hole in
the EPC housing.
7. Connect the two switch wires to the new sprayer ON/
OFF switch. Make sure the wires are connected to the
corresponding terminals from which they were removed (refer
to the labels created earlier in this procedure or the electrical
schematic in the Parts List section of this manual).
8. Carefully place the EPC assembly over the EPC housing taking
care not to pinch any wires.
9. Install the four screws that secure the EPC assembly to the EPC
housing. Tighten securely.
Replacing the Transducer
Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. use Titan ESD
wrist strap P/N 0507958 or equivalent when working
on electronic pressure control.
1. Perform the Pressure Relief Procedure.
EPC
Housing
EPC Assembly Screw
EPC Assembly
EPC
Board
2. Using a Phillips
screwdriver, remove the
four screws that secure
the electronic pressure
control (EPC) assembly
to the EPC housing.
Carefully remove the
EPC assembly from the
housing. Gently move
the assembly away from
the sprayer and allow the
assembly to hang from
the housing.
3. Locate the transducer wire in the EPC housing. This wire will
be protruding from a hole in the lower left hand corner of the
EPC housing. Disconnect this wire from the EPC board (it has
a phone jack-style connector).
4. Break off the locking tab from the phone jack-style connector
at the end of the transducer wire.
5. Using a 7/8” open-end wrench, loosen and remove the fluid
hose from the fitting on the bottom of the filter assembly.
