33
APPENDIX 1
WHEEL DRIVE SPEED SENSOR INSTALLATION AND
CALIBRATION PROCEDURE
1.
MOUNTING WHEEL DRIVE SPEED SENSOR
The Wheel Drive Speed Sensor consists of four magnets, a switch assembly with cable, and
mounting hardware.
Sequence of mounting Speed Sensor:
l)
Select a non-driven wheel (left front tractor wheel or implement wheel).
2)
Check for predrilled holes in rim. If not predrilled, see "RIM DRILLING INSTRUCTIONS FOR
WHEEL DRIVE SPEED SENSOR".
3)
Mount the four magnets to the inside of rim and tighten (See Figures below). Magnets must be
mounted in alternating red-black order.
4)
Mount switch assembly to stationary column with the hardware provided (See below). The switch
assembly need not pivot with the wheel.
5)
Position switch assembly so that as the wheel rotates the magnets pass across the center of the
black, molded switch assembly.
6)
Clearance gap between magnets and switch assembly must be between 1/4 inch [6 mm] and 1 inch
[25 mm]. With wheels pointed straight ahead, rotate wheel to ensure gap is correct. Make sure
vehicle wheels can be turned to their extremes in each direction without the magnets hitting the
switch assembly.
7)
Tighten switch assembly bracketry.
8)
Secure cable to column with plastic cable ties.
MAGNET LOCATION
MAGNET ASSEMBLY
SWITCH ASSEMBLY
