Cub Cadet ISeries - Manual (Page 143)

ELECTRICAL SYSTEM
137
9d. The voltage that shows-up on the meter is
the voltage that is being used to pass cur-
rent through a resistance in the circuit.
9e. Voltage drop on a good circuit should be
less than 0.1 volts. A voltage drop reading
on the meter of greater than 0.2 volts indi-
cates a fairly substantial problem that
demands attention.
• As an example, if the starter solenoid does not
engage properly, check for voltage drop between
the ground point for the starter solenoid and the
negative post on the battery. See Figure 7.41.
• With the starter engaged, this machine exhibited
a voltage-drop reading of 0.308 volts, indicating
a poor ground connection.
Figure 7.41
9f. A similar ground-side test on a tractor with a
slow-cranking starter motor can be con-
ducted between the engine block and the
negative battery post. See Figure 7.42.
9g. With the starter engaged, this machine
exhibited a voltage-drop reading of 0.312
volts, indicating a poor ground connection.
9h. Individually, these readings should lead a
technician to inspect the connection
between the solenoid and the ground path
on the first tractor (e.g. mounting hardware,
green wire with eyelet beneath head of sole-
noid mounting bolt), or the engine and the
frame on the second tractor (e.g. loose or
rusty engine mounting bolts).
9i. If both of these readings were found on the
same tractor, a common point in the system
would be the primary suspect (e.g. poor
connection between negative battery cable
and frame).
Figure 7.42