Alternator - brush holder/regulator module renewal

Starting and charging systems / Alternator - brush holder/regulator module renewal

1 remove the alternator (see Section 6).

2 Place the alternator on a clean work surface, with the pulley facing down.

3 Where applicable, remove the retaining screws, then prise open the clips and lift the plastic cover from the rear of the alternator.

4 Slacken and withdraw the brush holder/voltage regulator module screws, then lift the module away from the alternator (see illustrations).

5.4a Location of the brush holder/voltage regulator module

5.4b Lifting the brush holder/voltage regulator module away from the alternator

5 Measure the free length of the brush contacts - take the measurement from the manufacturers emblem etched on the side of the brush contact, to the shallowest part of the curved end face of the brush. Check the measurement with the Specifications; renew the module if the brushes are worn below the minimum limit (see illustration).

5.5 Measure the free length of the brush contacts

6 Inspect the surfaces of the slip rings, at the end of the alternator shaft (see illustration). If they appear excessively worn, burnt or pitted, then renewal must be considered; refer to an automobile electrical system specialist for further guidance.

5.6 Inspect the surfaces of the slip rings (arrowed), at the end of the alternator shaft

7 Reassemble the alternator by following the dismantling procedure in reverse. Refit the alternator as described in Section 6.