Overhaul of bosch alternators

OVERHAUL OF BOSCH ALTERNATORS

NOTE All the BOSCH alternators are more or less the same in terms of construction, so the descriptions and illustrations on the following pages apply to all of them.

Disassembly

Using an appropriate wrench, undo the nut (1) securing the fan and pulley to the alternator shaft.
Withdraw the fan and pulley from the alternator shaft.

Undo the bolts (4) securing the voltage regulator (5) to the alternator’s rear end bracket.

Electronic voltage regulator

A. brushes

If the regulator has to be renewed, always check the state of wear of the rotor’s slip rings. If the brushes have made recesses on the rings, renew the complete rotor assembly.