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Repair
24 311594Z
Position Sensor
NOTE: The Position Sensor (80) measures motor posi-
tion by detecting holes in the motor coupler (28). The
sensor is available separately (see Parts on page 45),
or as part of the Sensor Circuit Kit 24J305 (see manual
311603).
1. Jog the motor to bring the lower on the side oppo-
site from the motor to the bottom of its stroke.
2. Relieve pressure, page 9.
3. Shut off electrical power to the unit.
4. Remove two screws (12) and the cover (32).
5. See F
IG
. 12. Remove six screws (12), the circuit
board cover (34), and the gasket (33).
6. Disconnect the position sensor wires and the IS cir-
cuit field wires from the two terminal blocks (46).
Retain the terminal blocks. See the Electrical Dia-
grams, page 12.
7. See F
IG
. 9 on page 20. Loosen the nut (N) on the
strain relief (35).
8. See F
IG
. 13. Loosen the nut (M) on the conduit (44)
and unscrew the sleeve (79) from the position sen-
sor adapter (78). Remove the position sensor (80),
pulling its wires through the conduit (44).
NOTE: If the adapter (78) was removed, apply thread
lubricant and torque to 75-80 ft-lb (102-108 N•m).
9. Install the new position sensor (80) into the adapter
(78) and secure with the sleeve (79).
NOTE: The Position Sensor nuts are locked in place to
ensure correct positioning. Do not adjust.
10. Thread the position sensor wires through the long
length of the conduit (44) into the circuit board cav-
ity. Connect a terminal block (46) to each wire.
Reconnect the IS circuit field wires to the terminal
blocks. See the Electrical Diagrams, page 12.
11. Secure the conduit (44) to the position sensor
sleeve (79) with the nut (M). Torque to 15-20 ft-lb
(21-27 N•m).
12. See F
IG
. 13. Tighten the nut (N) on the conductive
strain relief (35) securely to ensure that the shield
and drain wire (G) has firm metal-to-metal contact
between the nut and bushing (B).
13. Install the new gasket (33), the cover (34), and six
screws (12).
14. Reinstall the cover (32) with two screws (12).