25
Magnet Operating Side Check
Bring the magnet near the end of the sensor and check the operating side.
* This is the side at which the displayed value increases in the "Revolution sensor testing"
menu within the "Governor Basic Setting" section earlier in this manual. Install the mag-
net with this side facing the sensor. Mark this side of the magnet with a felt tip pen.
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1. Drill a hole in the fan at the magnet mounting position. Make the hole about 4.1mm in
diameter and 1.5 to 1.7mm deep.
2. Embed the magnet in this hole in the direction in which an output is obtained. Use
epoxy adhesive that cures in 30 minutes or longer. Do not use epoxies that contain
metal such as JB Weld.
Sensor
Magnet
3. If the cooling fan is unbalanced and vibrates, etc., balance it by mounting the spare
magnet to the opposite side of the cooling fan in the opposite polarity (so that it does
not output a signal).
Magnet
Cement the magnet to the cool-
ing fan so that the magnet is
level with this side of the cooling
fan.
Sensor Mounting
The sensor mounting method depends on the model and engine.
1. Temporary the sensor to the sensor mount.
2. Drill a hole in the fan cover at the part corresponding to the sensor so that the distance
between the sensor and magnet can be made 1 to 2mm.
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