MacDon R85 Rotary Disc 13 Foot Self-Propelled Windrower Header - Manual (Page 152)

MAINTENANCE AND SERVICING
Replacing the Gearbox Speed Sensor
To replace the gearbox speed sensor, follow these steps:
1. Loosen bolts (A) and remove cover (B).
Figure 7.71
2. Disconnect the sensor wire from header wiring harness
at connector (A).
3. Remove bolt through clip (B).
4. Pull harness through grommet and into
drive compartment.
5. Remove nut and bolt (C) securing sensor (D) to bracket
and remove sensor.
6. Install new sensor (D) onto bracket with bolt and
nut (C). Ensure sensor is aligned with pulley rim.
7. Check that gap between sensor and pulley is 0.08 in.
(2 mm). Adjust as required.
8. Route connector and harness through hole in frame
and through grommet in cover.
9. Connect sensor wiring to existing connector (A).
NOTE: Top panel removed for clarity.
Figure 7.72
10. Reinstall cover (B) and secure with bolts (A).
Figure 7.73
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Rev. E