Replacing the Potentiometer
Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. Use Titan ESD
wrist strap P/N 700-1037 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.
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.
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.
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.
Accessories
Liquid Shield Plus
Cleans and protects spray systems
against rust, corrosion and premature
wear.
Part No.
Description
314-483...........4 ounce bottle
314-482...........1 quart bottle
Piston Lube
Specially formulated to prevent materials
from adhering to the piston rod, which
becomes abrasive to the upper seals.
Piston Lube will break down any material
that may accumulate in the wet cup and
keep it from drying.
Part No.
Description
314-481...........4 ounce bottle
314-480...........8 ounce bottle
Miscellaneous
Part No. Description
730-397...........High-pressure fluid Gauge
314-171...........Lubriplate, 14 ounce individual
314-172...........Lubriplate, 6 lb. can
700-1037..........Electrostatic discharge (ESD) wrist strap
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