Electric Starting System

104

TM 9-2320-312-24-2

Testing and Adjusting Section

The 8T-0900 Ammeter is completely portable.

The 6V-7070 Digital Multimeter or the 146-4080

This ammeter is a self-contained instrument that

Digital Multimeter is a hand-held service tool with

measures electrical currents without breaking the

a digital display, that is completely portable. This

circuit and without disturbing the conductor's

multimeter is built with extra protection against

insulation.

damage in field applications. The multimeter is

equipped with 7 functions and 29 ranges. The

The ammeter contains a digital display that is used

6V-7070 Digital Multimeter or the 146-4080

to monitor current directly within a range between 1

Digital Multimeter has an instant ohms indicator.

ampere and 1200 amperes. If an optional 6V-6014

This indicator permits checking continuity for a fast

Cable is connected between this ammeter and a

inspection of the circuits. The multimeter can also

digital multimeter, current readings can be viewed

be used for troubleshooting capacitors that have

directly from the display of the multimeter. This can

small values.

be accomplished under only one condition:

Note: Refer to Special Instruction, SEHS7734 for

the readings are less than 1 ammeter.

complete information for the use of the 6V-7070

Digital Multimeter. Refer to Operation Manual,

NEHS0678 for complete information for the use of

A lever opens the ammeter's jaws over a conductor.

the 146-4080 Digital Multimeter.

The conductor's diameter can not be larger than

19 mm (0.75 inch).

i01665659

The spring loaded jaws close around the conductor

Electric Starting System - Test

for measuring the current. A trigger switch controls

the ammeter. The trigger switch can be locked into

the ON position or into the OFF position.

SMCS Code: 1450-081

After the trigger has been working and the trigger is

Most of the tests of the electrical system can be

turned to the OFF position, the reading appears in

done on the engine. The wiring insulation must be

the digital display for five seconds. This accurately

in good condition. The wire and cable connections

measures currents in areas with a limited access.

must be clean, and both components must be tight.

For example, these areas include areas that are

The battery must be fully charged. If the on-engine

beyond the operator's sight. For DC operation, an

test shows a defect in a component, remove the

ammeter contains a zero control, and batteries

component for more testing.

inside the handle supply the power.

The starting system consists of the following

Note: Refer to Special Instruction, SEHS8420

components:

for more information about using the 8T-0900

Ammeter.

Keyswitch

6V-7070 Digital Multimeter or 146-4080

Starting motor solenoid

Digital Multimeter

Starting motor

Table 30

Tools Needed

Part Number

Part Name

QTY

6V-7070

Digital Multimeter

146-4080

g00283566

Illustration 92

6V-7070 Digital Multimeter or 146-4080 Digital Multimeter