ALTERNATOR GP 0R4327 - Caterpillar

The connection of battery cables to a battery and the disconnection of battery cables from a battery may cause an explosion which may result in injury or death. The connection and the disconnection of other electrical equipment may also cause an explosion which may result in injury or death. The procedures for the connection and the disconnection of battery cables and other electrical equipment should only be performed in a nonexplosive atmosphere.
Improper jump start cable connections can cause an explosion resulting in personal injury.Prevent sparks near the batteries. Sparks could cause vapors to explode. Do not allow jump start cable ends to contact each other or the engine.
If the installation is not equipped with a backup battery system, starting the engine from an external electrical source may be necessary.First, determine the reason that starting the engine from an external electrical source is necessary. Refer to Troubleshooting, UENR0955, "C13, C15, and C18 Engines".Many batteries which are considered unusable are still rechargeable. After jump starting, the alternator may not be able to recharge batteries that are severely discharged. The batteries must be charged to the proper voltage with a battery charger. For information on testing and charging, refer to the Special Instruction, SEHS7633, "Battery Test Procedure".
Using a battery source with the same voltage as the electric starting motor. Use ONLY equal voltage for jump starting. The use of higher voltage will damage the electrical system.Do not reverse the battery cables. The alternator can be damaged. Attach ground cable last and remove first.When using an external electrical source to start the engine, turn the generator set control switch to the "OFF" position. Turn all electrical accessories OFF before attaching the jump start cables.Ensure that the main power switch is in the OFF position before attaching the jump start cables to the engine being started.
Turn the start switch on the stalled engine to OFF. Turn off all accessories.
Connect one positive end of the jump-start cable to the positive cable terminal of the discharged battery. Connect the other positive end of the jump-start cable to the positive cable terminal of the electrical source.
Connect one negative end of the jump-start cable to the negative cable terminal of the electrical source. Connect the other negative end of the jump-start cable to the engine block or to the chassis ground. This procedure helps to prevent potential sparks from igniting combustible gases that are produced by some batteries.
Charge the batteries. The engine will not continue to run after starting if the batteries have not been charged.
Start the engine.
Immediately after the stalled engine is started, disconnect the jump-start cables in reverse order.Refer to the Electrical Schematic for your engine. Consult your Caterpillar dealer for more information.