When operating on the electrical system, it is important to handle batteries with care to prevent damage to the alternators and regulators. Examples are such as never connecting battery terminals in reverse, connecting booster batteries properly when starting up, remove battery cables before using fast charger, avoid using fast charger as a booster for starting vehicle, do not disconnect
Voltage Regulator while engine is running, do not ground alternator output terminal, do not run alternator open circuited with field energized , do not try to polarize the alternator and take care that the assembly of the alternator is not exposed to excessive heat or moisture when steam cleaning an engine. To get out and put in an alternator it will be important that you disconnected negative battery terminal; disconnected lead wires and connector; loosened drive belt adjusting bolt and removed belt; unscrewed attaching bolts of the alternator; mounted alternator to the engine and partially tightened attaching bolts; returned lead wires and connector; installed drive belt for an alternator; made proper adjustment of an alternator belt and secure mounting bolts fully on it then finally connect cable from battery checking its operation. New brush holder assembly must be installed during overhaul process, front case of the rotor should be aligned then rear case should be installed in order to remove rotor and brush holder assembly. Before conducting an alternator test ensure that your battery is okay and well charged plus use a correct tester along with appropriate testing probes.