RADIATOR GP 2256360 - Caterpillar

Starting Motor
Illustration 1 g00379835
Starting motor and starting motor solenoidNo load conditions at 25°C (77°F) Rpm with no load ... 4000 to 6000 rpm Maximum current ... 540 amperes Current draw with no load ... 130 amperes Voltage ... 11.5 volts Rated voltage ... 12 voltsPower rating 3003 engine ... 1.2 kilowatt 3013, 3014 and 3024 engines ... 2.0 kilowattsMinimum average cranking rpm ... 130Starting motor solenoid Pull-in current ... 54.5 amperes Hold-in current ... 10.5 amperes (1) Tighten the battery terminal nut to the following torque: ... 15 N m (11 lb ft) (2) Tighten the two mounting bolts to the following torque: ... 50 6 N m (37 4 lb ft) (3) Tighten the nut for the switch terminal to the following torque: ... 1.0 to 1.3 N m (9 to 12 lb in)Maximum resistance of the starter cable at 20°C (68°F) and at 12 volts ... 0.04 ohmsRefer to Testing and Adjusting, "Electrical System" for testing the starting motor.Start Relays
Illustration 2 g00381753
Schematic of the relays (4) When the ignition switch is in the OFF position or the RUN position, the relay switch is closed across the contact "30" and the contact "87a". (5) When the ignition switch is in the START position, the relay switch is closed across the contact "30" and the contact "87". Then, the starting motor is engaged.Maximum voltage drop in closed position ... 0.150 to 0.250 volts (6) Connector pins on the start relayResistance between contact "85" and contact "86" ... 7.2 0.7 ohms