MacDon R80 Rotary Disc - Manual (Page 90)

MAINTENANCE/SERVICE
Form # 169089
88
Model Year - 2009
7.9.12 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.
a. Lower header to ground, turn off engine, and
remove key.
b. Open LH drive shield door (A).
c. Gap (B) between speed sensor and pulley
should be 0.08 in (2 mm).
d. To adjust gap, loosen bolts (C) and move
bracket (D) to achieve gap. Tighten bolts.
e. To replace speed sensor:
1. Remove bolts (C) and remove bracket (D)
and sensor from gearbox.
2. Disconnect sensor wire from wiring harness.
3. Remove nut and bolt (E) securing sensor (F)
to bracket and remove sensor.
4. Install new sensor onto bracket with bolt (E)
and nut.
f. Install bracket (D) onto gearbox and adjust gap
(B) between sensor and pulley to 0.08 in (2
mm). Tighten bolts (C).
g. Connect sensor to wiring harness.
h. Close shield (A).
C
B
D
A
E
F