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308868 13
Pressure Control
Control Board
Removal
1.
Relieve pressure; page 4.
2. Fig. 15. Remove five screws (307) and
cover (322).
3. Fig. 22. Disconnect at control board (302):
D Four clutch leads: two violet and two black.
D Lead (D) from potentiometer.
D Lead (E) from transducer.
D Two red leads (A) to ON/OFF switch (309).
4. Fig. 15. Remove five screws (303), green ground
wire and control board (302).
Installation
When installing replacement control board, follow
instructions with control board to set model type.
1. Fig. 15. Install green ground wire and control
board (302) with five screws (303).
2. Fig. 22. Connect to control board (302):
D Two red leads (A) to ON/OFF switch (309).
D Lead (E) to transducer.
D Lead (D) to potentiometer.
D Four clutch leads: two violet and two black.
3. Fig. 15. Install cover (322) with five screws (307).
Pressure Control Transducer
Removal
1.
Relieve pressure; page 4.
2. Fig. 15. Remove five screws (307) and
cover (322).
3. Disconnect lead (E) from control board (302).
4. Remove three screws (319) and fluid filter (318)
from control plate (301). Carefully pull transducer
connector through rubber grommet (315).
5. Remove pressure control transducer (318z) and
packing o-ring (318aa) from filter housing (318a).
Installation
1. Fig. 15. Install packing o-ring (318aa) and pres-
sure control transducer (318z) in filter
housing (318a). Torque to 30–35 ft-lb.
2. Carefully feed transducer connector through
rubber grommet (315). Install fluid filter (318) on
control plate (301) with three screws (319).
3. Connect lead (E) to motor control board (302).
4. Install cover (322) with five screws (307).
Pressure Adjust Potentiometer
Removal
1.
Relieve pressure; page 4.
2. Fig. 15. Remove five screws (307) and
cover (322).
3. Disconnect lead (D) from control board (302).
4. Loosen set screws on potentiometer knob (313)
and remove knob, shaft nut, lockwasher (310) and
pressure adjust potentiometer (310).
5. Remove seal (311) from potentiometer (310).
Installation
1. Install seal (311) on potentiometer (310).
2. Fig. 15. Install pressure adjust potentiometer
(310), shaft nut, lockwasher (310) and potentiome-
ter knob (313).
a. Turn potentiometer shaft (310) clockwise to
internal stop. Assemble potentiometer knob
(313) to strike pin on plate (312).
b. After adjustment of step a., tighten both set
screws in knob 1/4 to 3/8 turn after contact
with shaft.
3. Connect lead (D) to control board (302).
4. Install cover (322) with five screws (307).