Cub Cadet 6X4 Shop Handbook page 314

Chapter 9 - Electrical
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 9.71.
Figure 9.71
• With the starter engaged, this machine exhibited
a voltage-drop reading of 0.308 volts, indicating
a poor ground connection.
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 9.72.
9g. With the starter engaged, this machine
exhibited a voltage-drop reading of 0.312
volts, indicating a poor ground connec-
tion.
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 hard-
ware, green wire with eyelet beneath
head of solenoid mounting bolt), or the
engine and the frame on the second trac-
tor (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 sys-
tem would be the primary suspect (e.g.
poor connection between negative battery
cable and frame).
310
Figure 9.72