Alternator - New Holland TC21D Operator's Manual

3. Install the vent plug after making sure the vent
holes are not blocked. At below freezing
temperatures, run the engine for a period of time
after adding water, allowing the battery to charge,
which prevents the water from freezing.

ALTERNATOR

The tractor's 35-amp alternator is belt-driven from
the engine crankshaft pulley. It is important that belt
slippage does not occur, or the charging system will
be affected. To adjust the belt, see the instructions
previously given under the "Fan Belt" section.
Other than belt adjustment, the only alternator
maintenance required is to periodically inspect the
terminals to ensure they are clean and tight. The
alternator cooling fan should also be cleaned
periodically.
When working on or checking the alternator, adhere
to following precautions or alternator damage may
occur:
Do not UNDER ANY CIRCUMSTANCES short
•
the field terminal of the alternator to ground.
Do not disconnect the alternator output lead or
•
battery cables while the alternator is operating.
Do not remove the alternator from the tractor
•
without first disconnecting the negative (-)
battery cable. When removing the battery,
disconnect the negative (-) cable first.
To install a battery, MAKE SURE that the positive
•
(+) cable is connected first and that the negative
terminal is connected to ground. Reverse
polarity will destroy the rectifier diodes in the
alternator.
If the battery charge warning light illuminates,
indicating that the alternator is not charging the
battery, check the fan belt and the wiring
connections. If these items are in satisfactory
condition and the warning light continues to indicate
no charge, consult your New Holland Dealer.
SECTION 3 - LUBRICATION AND MAINTENANCE
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