Batteries - Craftsman 28906 Professional Shop Manual

ELECTRICAL SYSTEM
,
2e.
Interpretation: If the ohm meter indicates
no continuity between the two stator leads,
there is a fault in the stator windings. If the
ohm meter indicates continuity between
either 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.
If the stator is good, test the amperage out-put
from the regulator / rectifier.
3a.
3b.
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.
The altenator should produce the rated
current at the rated RPM under an electri-
cal load.
3c. Connect a load tester between the battery
terminals.
3d.
3e.
With the engine running at the rated RPM,
energize the load tester to draw amperage
from the system.
Read the amperage on the meter.
See Figure 7.38.
NOTE: Output varies with load. A fixed-load
battery tester can be used to apply enough load
to test the charging system out-put.
Batteries
1. Precautions: See Figure 7.39.
CAUTION: Batteries produce flammable and
explosive gases, particularly during charging:
,
Figure 7.39
Do not smoke or allow an open flame or heat
source near the battery.
Charge batteries in an open area
Wear eye protection and acid resistant gloves
when handling batteries.
Do not allow direct metal contact across the
posts. This will produce extreme heat that may
cause direct burns or ignite flammable gas.
CAUTION: California Proposition 65 warning:
Battery posts, terminals, and related accessories
contain lead and lead compounds. These chem-
icals are known in the State of California to
cause cancer and reproductive harm. Wash
hands after handling.
NOTE: Some batteries used in Current Cub
Cadet equipment are sealed. It is not possible to
check, test or add fluid.
CAUTION: Batteries contain electrolyte, which is
highly corrosive. If a battery is ruptured, neutral-
ize the electrolyte with baking soda, then care-
fully rinse the effected area with water.
Importance of battery charge level and condi-
tion: A fully charged battery that is in good condi-
tion is an important factor when trying to
diagnose other parts of an electrical system:
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