micro-trak MT-3405 M - Speed Sensor Installation; Magnets; Attaching Magnets

PLEASE NOTE: If you have purchased a Trak-Star speed
sensor, disregard the section on magnetic speed sensors
and install the Trak-Star as described in the instructions
packed with the unit.
Locations where the sensor may be installed:
Non-driven wheel on tractor, vehicle or implement. This 1.
is less susceptible to errors resulting from wheel slip.
12
Installation (cont)
Speed Sensor Installation
Locate the Following Parts
• Speed Sensor Cable • Mounting “L” Bracket
• Magnet Clips • Magnets
• Cable Ties
Illustration 7
Illustration 8
Illustration 6
Illustration 5
S
N
North
North
North
South
South
South
1
2
4
3
5
6
Test magnet
should alternately
attract and repel.
1” Minimum
Drill lug
bolt hole
and bend
to t hub
Magnet
Tractor, vehicle or planter drive shaft. This type of 2.
mounting is recommended for trucks, four-wheel drive
tractors or other equipment that has poor or no access
to a non-driven wheel.
Magnets
The number of magnets that must be used depends on
where you mount the sensor. The general rule for tractor
or implement wheels is one magnet for each wheel bolt
(minimum of two, and always use an even number). For drive
shafts or small wheels (ATV’s), two magnets are generally
sufficient.
The magnets provided by Micro-Trak are marked with a
dashed line on the SOUTH pole side of the magnet. See
Illustration 5.
NOTE: Always use an even number of magnets, and always
alternate the polarities of the magnets as you go around
the wheel hub or drive shaft.
To install, mount the first magnet with the SOUTH pole
side (dashed line) facing toward the hub or shaft. The long
dimension of the magnet must wrap around the hub or shaft.
Mount the second magnet with the NORTH pole side facing
toward the hub or shaft. See Illustration 6.
For proper operation, the magnets must be evenly spaced
around the wheel or drive shaft. The magnets must be at
least 1” apart. See Illustration 7.
Attaching Magnets
Refer to Illustration 8 for general mounting instructions. For
specific mounting instructions, refer to Appendix A in the
back of this manual.
NOTE: Magnets may be attached mechanically as shown or
adhered with epoxy or other high quality adhesive. When
using adhesive, thoroughly clean the area of dirt and oil.