DAVIS DriveRight Installation - GD (All DriveRight Models) - Manual (Page 11)

10
Step 3. S ENSOR I NSTALLATION
The sensor installation requires mounting a magnet on the drive shaft of a rear
wheel drive vehicle or on the in-board CV joint hub of a front wheel drive vehicle.
The reed switch sensor (25) is mounted on a bracket opposite to the magnet rotat-
ing on the drive shaft or in-board CV joint hub. The sensor detects the magnet as it
passes. The gap between the magnet mount and sensor must be 3/8” - 5/8”
(10-16mm) (Figure 11 and Figure 15). There should be a clearance zone of at least
3/4” (19mm) above the drive shaft or in-board CV joint hub where the magnet is
mounted (Figure 11 and Figure 15).
R EAR W HEEL D RIVE
NOTE: Thinking ahead...Consider the mounting locations carefully. Are the attachment points
strong enough? What is behind any surface you want to drill into? Do not drill into your gas
tank or foot wells in the vehicle cabin or any location where wires might be present. Check
both sides of the surface before you drill.
A typical rear wheel drive installation is shown in Figure 12. Select a location on the
drive shaft within 12 inches (30cm) of the universal joint to account for vehicle sus-
pension movement while driving (Figure 10). Install the magnet (22) in its mount
(23) using the large tie wrap (24) as shown in Figure 13. Loosely cinch the large tie
wrap around the drive shaft, with the magnet mount oriented as shown, so you can
adjust its final position after the sensor is installed. Do not cinch tight the tie wrap.
Figure 10: Positioning the Sensor (Rear Wheel Drive)
Figure 11: Determining Proper Clearances and Gap (Rear Wheel Drive)