Speed Sensors
g258929
Figure 94
1.
Front axle motor mount
3.
Rear speed sensor (view from above)
2.
Front speed sensor (view from underneath)
4.
Rear steering cylinder
The traction system uses two speed sensors to monitor the ground speed of the
machine. One speed sensor is located in the front axle hydraulic motor mount
and the second speed sensor is located in the rear axle hydraulic motor mount.
The T1: TEC compares information from the speed sensors and the tandem
piston (traction) pump control solenoid valves to regulate traction speed. The
sensor signals are constantly monitored for fault detection.
A speed sensor fault will disable the cruise control and PTO, and the machine
will be forced to stop. Once the traction pedal is returned to the rest position,
the machine will operate in limp home mode (reduced ground speed and PTO
disabled) until the ignition key is cycled OFF and ON.
Testing the Speed Sensors
The speed sensors and their circuit wiring can be tested as a T1: TEC input using
the InfoCenter Display; refer to
Using the InfoCenter Display for Troubleshooting
(page 3–23)
. If testing determines that a sensor and its circuit wiring are not
functioning correctly, proceed with the following test procedure:
Note:
Testing the speed sensor requires the use of specialized equipment. In this
procedure, visually inspect and clean the sensor then test the wire harnesses.
1. Park the machine on a level surface, lower any attachments and stop the
engine.
Note:
It may be necessary to remove the bed to gain access the rear speed
sensor.
2. Disconnect the wire harness connector from the sensor and remove the
sensor from the hydraulic motor mount.
3. Clean any corrosion from the sensor and wire harness connector contacts.
4. Check the face of the sensor for damage. Replace the sensor if the face is
chipped or scratched.
5. Test the machine wire harness to the speed sensor:
Outcross 9060
Page 6–55
Electrical System: Electrical Component Testing
18234SL Rev B
Summary of Contents for 07511AA
Page 4: ...Reader Comments Page 4 Outcross 9060 18234SL Rev B ...
Page 18: ...Safety Safety and Instructional Decals Page 1 10 Outcross 9060 18234SL Rev B ...
Page 38: ...Specifications and Maintenance Special Tools Page 2 20 Outcross 9060 18234SL Rev B ...
Page 96: ...Engine Service and Repairs Page 4 24 Outcross 9060 18234SL Rev B ...
Page 208: ...Hydraulic System Service and Repairs Page 5 112 Outcross 9060 18234SL Rev B ...
Page 294: ...Electrical System Service and Repairs Page 6 86 Outcross 9060 18234SL Rev B ...
Page 384: ......