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):
DFour clutch leads: two violet and two black.
DLead (D) from potentiometer.
DLead (E) from transducer.
DTwo 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):
DTwo red leads (A) to ON/OFF switch (309).
DLead (E) to transducer.
DLead (D) to potentiometer.
DFour 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).
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