Speed Sensor (Workman HDX and HDX--D)
The speed sensor is attached to the upper transaxle
cover (Fig. 34). It uses a magnetically based, Hall Effect
integrated circuit. As the differential in the transaxle
turns, the sensor accurately senses the movement of
thedifferentialringgearteethpassingbythesensor.The
redstripedconnectorwireisthesensorpositivelead,the
black wire is the ground lead and the gray striped wire
is the signal output.
2
1
Testing
1.
gine, apply parking brake and remove key from ignition
switch.
Park machine on a level surface, raise bed, stop en-
2.
Install bed support on bed lift cylinder to prevent bed
from lowering.
3.
sembly.Disconnect thewireharness connector fromthe
traction speed sensor.
Locate traction speed sensor on the transaxle as-
Figure 34
1.
Speed sensor
2.
Flange head screw
4.
sor to transaxle. Remove speed sensor from transaxle.
Remove flange head screw that secures speed sen-
1K ohm
resistor
IMPORTANT: Incorrect jumper wire connections
during testing can damage the sensor.
5.
Using a +12 VDC battery, a multimeter, a 1K ohm re-
sistor and appropriate jumper wires, connect the battery
and multimeter to the speed sensor using Figure 35 as
a guide.
--
+
12
VDC
6.
7.
ametalobjectisheldnearthesensortip.Themultimeter
should display battery voltage when the metal object is
moved away from the sensor tip.
Set multimeter to DC volts setting.
6
4
Themultimeter shoulddisplay verylowvoltagewhen
C B A
3
5
8.
tor and multimeter leads from sensor connector.
Aftertestingiscomplete,removejumperwires,resis-
1
9.
Replace speed sensor if necessary.
speed sensor into transaxle and secure with
2
10.Install
flangeheadscrew.Reconnect speedsensortowirehar-
ness.
Figure 35
11.
Remove bed support from lift cylinder and lower bed.
1.
2.
3.
Speed sensor
Sensor tip
Sensor connector
4.
5.
6.
Red striped wire
Gray striped wire
Black wire
Electrical System
Page 8 -- 24
Workman HD Series
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Document Type | Service Manual |
| Language | English |
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