Owner`s manual

38
Miscellaneous
Bearing Failures
Bearing failures can be easy to identify but extremely
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can be the result of electrolysis. No, it does not involve hair
removal.
It is stray voltage attempting to seek an area to ground
itself. In this case that area happens to be through the
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bearing causing pitting, scoring, and eventually failing the
main bearing.
These are typically low hour failures, a key factor in what to
look for. Although there are other causes for bearing failures
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troubleshoot. The voltage could come from a source such
as the clutch, or loose ground cable at the block.
For that reason we have attached some excerpts from an
OEM bulletin giving a detailed outline of a test procedure
used to check the clutch mechanism. The additional
information reduces the potential for incorrect diagnosis,
that may result in a repeat failure.
Kohler Service Bulletin 240 covers many of the tests that
can be done to the clutch after it has been removed. Here
is a test that can be done before you remove the clutch that
might show a failure that won’t show up when the clutch is
removed.
1. Disconnect the tractor wiring from the battery.
2. Connect wire from the positive terminal of a fully
charged battery to one of the clutch leads. Connect
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the battery to the other clutch lead. The clutch should
engage.
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set a voltmeter to 12 volts DC. Attach the meter
common lead to the battery negative terminal and probe
the clutch with the meter VDC lead (L). Test various
points on the clutch body. The meter should read zero.
No voltage should be running through any part of the
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mechanical parts of the clutch, the clutch must be
replaced.
Pre-Emptive Action