MacDon R85 Rotary Disc 13 Foot Self-Propelled Windrower Header - Manual (Page 151)

MAINTENANCE AND SERVICING
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
To adjust the gearbox speed sensor, follow these steps:
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.
1. Lower header to ground, turn off engine, and
remove key.
2. Loosen bolts (A) and slide cover (B) off opening.
Figure 7.69
3. Check gap (E) between sensor (A) and pulley. If
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.
Figure 7.70
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143
Rev. E