MacDon FD75 OM - Manual (Page 385)

MAINTENANCE AND SERVICING
3. Maintain a 1/8 in. (3 mm) gap between sensor disc (A)
and sensor (B). Adjust with nuts (C) as required.
4. Replace sensor as follows:
a. Disconnect connector (D).
b. Remove top nut (C) and remove sensor (B).
c. Remove top nut from new sensor (C) and position
sensor in support.
d. Secure with top nut (C).
e. Adjust gap between sensor disc (A) and sensor (B)
to 1/8 in. (3 mm) with nuts (C).
f. Connect to harness at (D).
IMPORTANT:
Ensure sensor electrical harness does NOT
contact chain or sprocket.
Figure 6.249: Speed Sensor
A - Sensor Disc B - Speed Sensor
C - Nuts D - Connector
Replacing Lexion 500/700 Series Reel Speed Sensor - Double Reel
To replace the reel speed sensor for a Lexion 500 or 700 series combine on a double reel header, follow
these steps:
WARNING
Stop combine engine and remove key before making adjustments to machine. A child or even a pet could
engage the drive.
1. Lower header and reel, shut down combine, and remove key from ignition.
2. Remove six screws (A) and remove upper cover (B).
Figure 6.250: Drive Cover
169894 371 Revision A