Cub Cadet 4 x 4 Volunteer - Manual (Page 314)

Chapter 9 - Electrical
310
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.
• 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).
Figure 9.71
Figure 9.72