Rectifier Bridge Test: Cs144
- Scribe end frames to facilitate reassembly. Remove through bolts and separate end frames. Remove stator. Connect an ohmmeter between grounded heat sink and any one of 3 grounded flat metal rectifier bridge terminal connectors; note reading. See Fig 1.
- Reverse meter leads. If both readings are the same, replace rectifier bridge. Repeat test between grounded heat sink and the other 2 flat metal terminal connectors. If readings are the same when leads are reversed at either connection, replace rectifier bridge.
- Repeat test between insulated heat sink and its 3 flat rectifier bridge metal connectors. Replace rectifier bridge if test readings are the same when leads are reversed at any test connection.NOTE: Manufacturer recommends installing new bearing at slip ring end whenever alternator is reassembled.
- To reassemble alternator, reverse disassembly procedure. Retain brushes with brush retaining pin during reassembly. See Figure. Remove retaining pin after tightening through bolts.