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ELECTRICAL SYSTEMS
3.
Set the multimeter or volt/ohm meter to check
resistance (ohms).
4.
Connect the meter lead wires to the wires in the
clutch connector (Figure 228).
Figure 228
5.
The meter should read between 2.40 ohms and
3.40 ohms. If the reading is above or below these
readings, the field has failed and needs to be
replaced. If the reading is between these two
limits, measure the clutch current draw.
Measuring Clutch Current Draw
1.
Disengage the PTO, set the parking brake, and
turn the ignition to OFF.
2.
Disconnect the clutch wire connector.
3.
Set the multimeter to check amps (10 amp scale).
4.
Connect the positive meter lead to the tractor
terminal (1) of the clutch wire, Figure 229.
5.
Connect the negative meter lead to the
corresponding wire terminal (3), Figure 229.
6.
Connect a short jumper lead from terminal (2) to
(4), Figure 229.
7.
Turn the ignition switch to the "RUN" position and
the PTO switch to the "ON" position.
4 - 6
8.
If the meter reading is 3.5 amps or above, the
system is functioning properly. If the meter
reading is below 3.5 amps, check the electrical
system for problems (i.e., the battery, ignition
switch, PTO switch, or wiring harness may be
malfunctioning).
3-6
Clutch Burnishing Procedure
The clutch should be burnished as part of the pre-
delivery service, or whenever a new clutch is installed.
Burnishing polishes the clutch plate, allowing for
smooth clutch engagement.
With a PTO driven attachment installed (i.e., mower,
snowthrower, or tiller), run the engine at half throttle.
Engage and disengage the clutch 5 times (10 seconds
on/10 off).
Increase engine RPM to ¾ to full throttle. Engage and
disengage clutch 5 times (10 seconds on/10 seconds
off).
PTO Switch
Purpose
The PTO switch is typically used to turn on the Electric
PTO Clutch and to function as part of the safety
interlock system.
400XT Series Tractor Service Manual
Figure 229
3-7
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