To increase oil pressure, add a washer between
the spring and oil pressure regulator valve. More than four
washers should not be used. If four washers do not fulfill
the required range, either the spring is faulty or other
engine troubles exist.
After you make the adjustments, check that the
oil pressure remains in the required ranges during
Figure 3-6. Oil pressure adjustment.
Section V. REPAIR OF ELECTRICAL SYSTEM COMPONENTS
engine operating speeds could severely damage the
3-16. Description of Engine Electrical System
starting motor. Reengagement of the starter while the
engine is running is prohibited by the starter disengage
The alternator and regulator are typical
automotive types in which the alternator output is
controlled through the voltage regulator, depending
upon the state of charge of the battery. When the
battery charge is low, the voltage regulator increases the
strength of the alternator field to increase the output of
the alternator. When the battery charge is
normal, the output of the alternator decreases to near
Disconnect the battery cable from the
disconnecting any other leads from the
Reversed polarity connections in the
engine components. This precaution will
charging system can severely damage the alternator.
prevent shorts which could damage the
To prevent this damage, the system is protected by a
alternator, voltage regulator, or other parts.
reverse polarity protector mounted on the voltage
Removal. Remove the alternator as directed
in TM 5-4320-234-12, para 4-38.
The engine starter is a solenoid-operated
type in which the solenoid switch is mounted on the top
Alternator Brush Replacement.
of the starter. The solenoid switch uses electrical
energy to pull the starter drive into engagement with the
(1) Remove the two assembled washer
flywheel ring gear and to form the electrical circuit which
screws (4, fig. 3-7) that secure the brush cover (5) to
energizes the starter after the drive is engaged. When
the alternator; carefully pull the cover away from the
the engine starts, the starter drive is disengaged,
preventing the engine from driving the starter since