3. Acceptance criteria for alternator bench tests
For alternator tests on an alternator test bench, the following acceptance criteria apply:
Hold time of load
Currents [s]
4. Inspection of Alternator E4A-91-400-000 and Carbon Brushes
This section lists the steps to disassemble the alternator and its components (e.g. brush holder) and
to measure the length of the carbon brushes.
This section contains also the criteria for replacing the Brush Holder assembly E4A-91-410-000.
A. Special Tools
Slotted Screw Driver (~2mm)
B. Remove the Brush the Holder Assembly
Remove all black covers of the terminals
B+/W/L.
Refer to Fig. 24 - 33 and Fig. 24 - 34.
Use Torx T20 or with wrench
(hexagonal) size 7, depending on the
screwing.
Remove the two screws/hexagon nuts G and
G2.
Remove the plastic cover on the backside of
the alternator.
Remove the hexagon nut T2
(R1 screw/washer + spacer).
Use wrench Torx T20, and Terminal
Screw T2.
Carefully remove Brush Holder Assembly.