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Rev. B
Workman 200 Spray System Page 2 -- 9 Electrical System
Traction Speed Sensor
The traction speed sensor is attached to the upper
transaxle cover (Fig. 13). It uses a magnetically based,
Hall Effect integrated circuit. As the differential in the
transaxleturns,thesensoraccuratelysenses themove-
ment of the differential ring gear teeth passing by the
sensor. The red striped connector wire is the positive
lead, the black wire is the ground lead, and the gray
striped wire is the signal output.
Testing
6. Locate traction speed sensor on the transaxle as-
sembly.Disconnectthewireharnessconnectorfromthe
traction speed sensor.
7. Remove cap screw and lock washer that secure
speed sensor to transaxle. Remove speed sensor from
transaxle.
8. Connect positive multimeter test lead to the sensor
connector gray striped wire terminal and the negative
multimeter lead to the connector black wire terminal
(Fig. 14). Set multimeter to ohms setting.
IMPORTANT: Incorrect jumper wire connections
during testing can damage the sensor.
9. Using a+12 VDC battery, amultimeter, a 1Kohm re-
sistorand appropriatejumper wires,connectthe battery
and multimeter to the speed sensor using Figure 14 as
a guide.
10.Set multimeter to DC volts setting.
11.The multimetershoulddisplayverylowvoltagewhen
ametalobjectis heldnearthesensortip.Themultimeter
should display battery voltage when the metal object is
moved away from the sensor tip.
12.After testing is complete, remove jumper wires, re-
sistor and multimeter leads from sensor connector.
13.Replace speed sensor if necessary.
14.After testing is complete, remove jumper wires and
multimeter leads from sensor connector. Reinstall
speed sensor into transaxle and secure with cap screw
and lock washer. Reconnect speed sensor to wire har-
ness.
1. Transaxle assembly 2. Traction speed sensor
Figure 13
1
2
1. Speed sensor
2. Sensor tip
3. Sensor connector
4. Red striped wire
5. Gray striped wire
6. Black wire
Figure 14
BAC
--
+
12 VDC
6
4
2
3
1
5
1K ohm
resistor
Electrical
System