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Pressure Control Repair
309977H 19
Pressure Control Transducer
Removal
Refer to Wiring Diagram, page 29.
1. Relieve pressure; page 6.
2. Remove five screws (12) and motor cover (18).
3. Disconnect lead (E) from motor control board (38).
4. Remove strain relief (49) from circuit board bracket
(21). Thread transducer connector through bracket.
5. Remove pressure control transducer (43) and pack-
ing o-ring (89) from pump housing (202).
Installation
1. Install packing o-ring (89) and pressure control
transducer (43) in pump housing (202). Torque to
30-35 ft-lb.
2. Thread transducer connector through circuit board
bracket (21). Install strain relief (49) in circuit board
bracket.
3. Connect lead (E) to motor control board (38).
4. Install motor cover (18) with five screws (12).
Pressure Adjust Potentiometer
Removal
Refer to Wiring Diagram, page 29.
1. Relieve pressure; page 6.
2. Remove five screws (12) and motor cover (18).
3. Disconnect potentiometer lead (47) from motor con-
trol board (38).
4. Remove potentiometer knob (16), gasket (88) and
pressure adjust potentiometer (47).
Installation
1. Install pressure adjust potentiometer (47), gasket
(88) and potentiometer knob (16).
a. Turn potentiometer full clockwise.
b. Install knob at full clockwise position.
2. Connect potentiometer lead (47) to motor control
board (38).
3. Install motor cover (18) with five screws (12).