Lull 944E-42 Service Manual User Manual download pdf (Page 677)

100

101

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

4110390

OU0780

0000000

RPM X 100

1/2

104

176

248

120

°C

°F

r/min

MU0010

1 2 ... 672 673 674 675 676 677 678 679 680 681 682 ... 845 846

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Lull 944E-42 Service Manual User Manual Page 677

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