Cub Cadet 6X4 Shop Handbook page 306

Chapter 9 - Electrical
2e. Interpretation:
If the ohm meter indicates no continuity
between the two the purple stator leads,
there is a fault in the stator windings.
If the ohm meter indicates continuity
between either purple stator lead and
ground, the stator windings are shorted
to ground.
NOTE: If there is an intermittent charging sys-
tem problem, perform these tests when the
engine is cold, and again when the engine is hot.
NOTE: Low voltage readings may also result
from poor test connections or low engine RPM.
3. If the Kohler stator is good, test the amperage
out-put from the regulator / rectifier.
3a. Attach a DC shunt with DVOM or an
ammeter capable of reading up to 25
amperes of DC current. The most accu-
rate point to take a reading will be at the
battery ground cable.
3b. The Kohler 15 amp system should pro-
duce 15 amps with the engine running at
3,600 RPM.
3c. Connect a load tester between the battery
terminals.
3d. With the engine running at 3,600 RPM,
energize the load tester to draw amper-
age from the system.
3e. Read the amperage on the meter.
See Figure 9.59.
Figure 9.59
NOTE: Output varies with load. A fixed-load
battery tester can be used to apply enough load
to test the charging system out-put.
3f. With the engine off, connect Kohler tool
#25 7651-20 to the regulator/rectifier:
The two black leads go to the terminals
normally connected to purple stator
leads.
The red lead goes to the center terminal
(B+).
The ground clip goes to ground.
3g. Plug the tester into a 110V AC outlet, turn
it ON and push the test button until it
clicks. Repeat the test to confirm.
3h. Read the illuminated jewel for the verdict.
See Figure 9.60.
NOTE: A flashing "LOW" jewel may result from a
poor ground connection.
NOTE: If the regulator rectifier is being tested in-
situ on the engine, check the ground quality
using the voltage drop test described elsewhere
in this section.
4. Checking the Caterpillar charging system:
4a. The Caterpillar alternator is belt driven.
Confirm that the belt is not slipping before
assessing the alternator.
4b. Attach a DC shunt with DVOM or an
ammeter capable of reading up to 25
amperes of DC current. The most accu-
rate point to take a reading will be at the
battery ground cable.
4c. Connect a load tester between the battery
terminals.
302
Figure 9.60