Bosch 65 Amp Alternator Rebuild

[320iAman]

DSCI0378.JPG New 9-Diode RectifierDSCI0377.JPG New Rectifier Soldered to the StatorDSCI0379.JPGOld Slip Ring removed from rotor

DSCI0382.JPG New Slip Ring installed and soldered in to Rotor windings.

New SKF Bearings Front and Back--same as in this post..

https://www.bimmerforums.com/forum/s...earing-Refresh

Randy

[320iAman]

DSCI0383.JPG Alternator Back side--new noise suppressor and Voltage Regulator DSCI0384.JPG Front SideDSCI0385.JPG Slip Rings 17mm ID x 28 mm OD with brushes---

7 of them for less than the price of 3... .......Anyone doing this and needs a New Slip Ring--I have a few to sell. New Bushings are ordered and going to be installed to boot..

New top and bottom Bushings installed-Polyurethane

DSCI0386.JPG DSCI0387.JPG

Ordered a new solid pulley for this one to cap off the alternator rebuild, pictures later, the pulley hole diameter matches the rotor shaft diameter, had a choice of bigger/smaller pulley.

Randy

[320iAman]

This 65A Alternator is done and ready for service, exchanged the BMW pulley from the 80 A alternator with this one, New Paint on EF as well.

DSCI0388.JPG

Randy

[320iAman]

Just came back from Alternator test,, 1st test failed 11.1V output,, took out the new Aborn Voltage Regulator and put in new Huco Voltage Regulator-Made in Germany-all signs points to good--

The machine testing the Alternator was coded for 1980 BMW E21 320i - Alternator

Print out on Test Results:

Lamp/Diode Trio: Passed
Regulator Test: Passed
Rectifier Test: Passed

Battery Volts- Low 13.5,Actual -14.64, High 15.4
Ripple Volts Low -0, Actual -.33, High 1.25
Jump On Volts Low-0,Actual 1.51, High 8.00
Jump Off Volts- 13.00 , Actual 14.61, High -0

This alternator has tested good and will function properly in the vehicle.

Just retested at place where 11.1V showed up with Huco VR

Lamp / Diode Trio Passed
Regulator Test Passed
Rectifier Test Passed
Rated Amps: 65
Alternator is Good

DSCI0392.JPG DSCI0393.JPG


Randy

[320iAman]

Update this is now installed and running very well,all signs point to good, The 100 A alternator is out to refresh its bearings and bushes and so forth.


Randy

[amarino]

Randy you always do great write ups pictures and explanations. Need a wiki or something with all of your posts and info. Keep up the good work!

[320iAman]

Thanks, this one is running is good, Voltage is around 14.6 V, just tested it again, The rectifier plate with 9 diodes, I paid like $20.00 with free shipping.


Randy