ENGINE CRANKS BUT FAILS TO START OR IS HARD TO START ABOVE 32F (0C) (cont) -624880101

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

3. ENGINE CRANKS BUT FAILS TO START OR IS HARD TO START ABOVE 320F (0C) CONTINUED

WARNING

Although ignition lock switch must be on and battery ground cable connected to test electrical circuit

voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests

or replacing parts. This will keep you from getting shocked and prevent damage to parts and

equipment.

CAUTION

Do not operate electric starting motor for more than 20 seconds at a time. Allow two minutes for

cooling before using starter again to prevent overheating.

Step 3.

Using multimeter set to 30 vdc scale, place red probe on stroke control solenoid valve connector (1)

and black probe on hydraulic pump (2). Have assistant press in and hold starter switch (3) for a few

seconds. Check for 11 to 13 vdc on multimeter. Have assistant turn ignition lock switch (4)

counterclockwise to off.

a. If multimeter reads 11 to 13 vdc, notify Direct Support Maintenance.

b. If multimeter reads less than 11 vdc, repair wire from stroke control solenoid valve connector (1)

to starter solenoid switch (page 2-137).

Step 4.

Turn ignition lock switch (4) clockwise to ignition. Push in and hold starter switch (3) for a few

seconds. Check to see if engine is turning over too slowly. Turn Ignition lock switch (4)

counterclockwise to off.

a. If engine is not turning over too slowly, go to step 5.

b. If engine is turning over too slowly, go to Engine Malfunction 1: Engine Fails To Crank When

Starter Is Engaged (page 2-15).

Step 5.

Have assistant turn ignition lock switch (4) clockwise to ignition and counterclockwise to off. Listen

to fuel metering pump (5) for clicking sound.

a. If clicking noise is heard, go to step 8.

b. If no clicking noise is heard, go to step 6.

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