TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
TROUBLESHOOTING USING MULTIMETER - CONTINUED
Turn all accessories OFF.
Remove wire from upper terminal (GND Negative) on engine fuel shutoff solenoid.
Remove protective cap from test connector.
Select VDC on multimeter.
Connect positive (red) lead from multimeter to test connector pin 2.
Connect negative (black) lead from multimeter to test connector pin 4.
DO NOT crank starter motor for more than 30 seconds at a time. After 30 seconds, allow starter motor to
cool for at least two minutes before attempting to start engine again. Excessive heating of starter motor may
result in damage or premature starter failure.
Tachometer will indicate no more than 400 RPM for this test.
Using key start switch, crank engine and observe multimeter for an indication of less than 1.0 volt. If indication is
more than 1.0 volt, the problem could be:
Alternator circuit breaker with excessive voltage drop. Replace alternator circuit breaker (WP 0038
Start relay with excessive voltage drop. Replace start relay (WP 0045 00) and retest.
Remove test leads from test connector.
Install test connector protective cap.
Connect wire to upper terminal (GND Negative) on engine fuel shutoff solenoid.
DIFFERENTIAL LOCK CHECK
Equipment Condition. Bowl/water tank empty (TM 5-3800-205-10-1 or TM 5-3800-205-10-2).
Differential Lock Check.
Start engine (TM 5-3800-205-10-1 or TM 5-3800-205-10-2) and allow air pressure to reach cut-out pressure of
125 psi (860 kPa).
Raise bowl/water tank (TM 5-3800-205-10-1 or TM 5-3800-205-10-2).
Place parking brake to OFF.
With engine at low idle speed, use steering wheel and articulate machine completely to left and right.
With tractor and scraper or water distributor in a straight position, push and hold differential lock pedal down.