Product Info

Service Bulletin (UK) - Operation of 594A Regulator on large 24 volt alternators

This Service Bulletin (SB No.0041 - attachment below) describes the operation of the 594A regulator fitted to any of the following large frame alternators:

AC172R, AB172R, AB172RL
AC203R, AC203RA
AB207R

Service Bulletin (UK) - Alternator Diagnosis Information

This Service Bulletin (SB No.0040 - attachment below) describes the typical steps necessary to troubleshoot an alternator installed on a 24 volt system. The bulletin includes a table showing the symptom, fault, and action required for problems found during the electrical tests detailed.