Lull 944E-42 Service Manual - Manual (Page 677)

9.167 Model 644E-42/944E-42 Rev. 6/04
Electrical System
7. Lower and lock engine cover. To release and lower
the engine cover (19) from the fully raised position,
lift up slightly on the cover and push the upper part
of the right gas shock (20) (orange tab) to the left.
Line up the upper part of the shock lock tube with the
lower part of the gas shock and pull the cover down
to the closed position.
9.12 CHARGING CIRCUIT
The purpose of the charging circuit is to maintain battery
voltage between 13.8 and 14.2 volts. The ignition switch
must be in the RUN position with the engine running for
the charging system to operate.
The charging circuit consists of the battery and a belt-
driven alternator with an internal voltage regulator. These
components work together to provide electrical power for
the vehicle, including the starting system, front dash
panel, horn, solenoids, back-up alarm, auxiliary hydraulic
joystick and all accessories.
Current flows from the positive (+) post of the battery to
the (+) terminal on the starter motor.
When the ignition switch is in the RUN position, excitation
occurs and the alternator begins emitting a charge.
Current flows from the alternator B+ terminal to the starter
motor B terminal, then through the positive (+) battery
cable to the battery. The circuit in the dash panel
connects to the D+ terminal and detects low battery
voltage.
The warning indicator (21), a battery-shaped icon on the
front dash panel, illuminates for three seconds when the
engine is started and will remain illuminated if the engine
is not running. The warning indicator illuminates when the
battery is at a low state of charge, and when the alternator
is no longer able to charge the battery.
The purpose of the charging circuit is to maintain battery
voltage between 13.8 and 14.2 volts (battery voltage).
The key switch must be in the RUN position with the
engine running in order for the charging system to
operate.
The charging circuit consists of the battery and a
belt-driven alternator with an internal voltage regulator.
These components work together to provide electrical
power for the vehicle, including the starting system,
operator’s dash panel, horn, solenoids, back-up alarm,
auxiliary hydraulic joystick and all accessories.
Current flows from the positive (+) post of the battery to
the positive (+) stud on the starter.
MU0650
13
14
15
18
17
16
4110390
1.
2.
OU0780
19
20
20
0000000
RPM X 100
5
10
15
30
20
25
F
1/2
E 104
176
80
248
120 °C
°F
D
r/min
MU0010 21