TESTING - TM-10-3930-607-150102

ELECTRICAL

2. Observe contacts while starting the engine in a

AUTOMATIC DISENGAGEMENT AND LOCK-OUT

normal manner; do not speed up the engine but allow it

SYSTEM

to idle in a normal manner. (Recommended idle speed.)

A. GENERAL

3. If contacts remain closed during cranking and

open when engine starts, the relay operation is

The automatic disengagement and lock-out, or ADLO

satisfactory and no further adjustments are required.

system consists of a resistor and a relay as shown in the

Repeat Step 2 once more to insure that operation is

wiring diagram. (Fig's 1 and 17)

satisfactory, then stop engine and replace cover.

The ADLO system protects the starter motor pinion and

4. If contacts open during cranking before engine

engine ring gear by eliminating the possibility of starter

starts, bend armatures and repeat Steps 2 and 3.

motor engagement with a running engine. Turning the

ignition key closes the starter circuit. As soon as the

5. If contacts do not open when engine starts,

engine fires, the output of the alternator will break the

operate at idle speed and bend upper contact armature

starter circuit in the relay and the pinion disengages.

until contacts open. Repeat Steps 2 and 3.

Disengagement takes place between cranking speed

and low idle.

6. If relay contacts cannot be adjusted to open at

engine idle, replace the relay.

7. Resistor a. If the resistor burns out, the starter

can be engaged with the engine running and the ADLO

system becomes ineffective.

b. The resistor is rated 7.5 ohms, maximum

power dissipation: 25 watts. Check the resistor

with the unit cold, using an ohmmeter or

Multimeter. Replace a defective resistor.

8. Relay

a. A burnt coil will cause the points to stay closed.

Thus, the starter can be engaged with the engine

running.

Figure 17.

b. If the points fuse, the starter can be engaged

with the engine running.

B. TESTING

c. If the points become pitted, coated, or make no

1. With engine stopped, remove relay cover and

proper contact, the engine can not be started.

observe contacts which should be closed. If contacts

Replace the relay in these cases.

are not closed, adjust contacts until they close by

bending armatures.

B-65