Gearbox Speed Sensor; Adjusting The Gearbox Speed Sensor; Replacing The Gearbox Speed Sensor - MacDon R85 Operator's Manual

7.7.4 Gearbox Speed Sensor

The gearbox speed sensor monitors the rotational speed of the gearbox output shaft and sends a signal to the
systems monitor in the operator's station that is displayed as disc speed.
The sensor does not require regular maintenance, and if it malfunctions or is damaged, it can be easily adjusted
or replaced.

Adjusting the Gearbox Speed Sensor

DANGER
Stop engine and remove key from ignition before leaving operator's seat for any reason. A child or even a
pet could engage an idling machine.
To adjust the gearbox speed sensor, follow these steps:
1. Lower header to ground, turn off engine, and
remove key.
2. Loosen bolts (A) and slide cover (B) off opening.
3. Check gap (E) between sensor (A) and pulley.
required, adjust gap by loosening bolts (B) and moving
bracket (C) to achieve 0.08 in. (2 mm) 0.08–0.12 in.
(2–3 mm) gap (E). When correct gap is achieved,
tighten bolts (B).
4. Check position of sensor. If required, adjust position
by loosening bolt (D) and moving sensor to align it with
rim of pulley.
NOTE:
Top panel removed for clarity.

Replacing the Gearbox Speed Sensor

To replace the gearbox speed sensor, follow these steps:
169455
MAINTENANCE AND SERVICING
If
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Figure 7.77: Gearbox
Figure 7.78: Gearbox Speed Sensor
Revision F