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  #1  
Old 01-18-2009, 08:17 PM
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W126 Alternator Removal Problem w/pic

I have scoured this board and cannot find anything related to this problem.

I have an 83 300SD and am trying to remove the alternator. I am getting hung up with trying to take out the bolt that is attached to the adjusting screw. This bolt cannot come out unless I remove the adjusting screw from the fork that it sits in. How do I go about getting out of the grasp of the fork that is part of the harness? I have attached a pic to show you exactly what I am talking about.

Any and all help is greatly appreciated. Thanks!
Scott

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W126 Alternator Removal Problem w/pic-alt_fork.jpg  
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  #2  
Old 01-18-2009, 08:59 PM
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just take your time and look at the w126 service disc which tells you how
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  #3  
Old 01-18-2009, 09:12 PM
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I bent the tab holding the bolt in the groove. Then the bolt popped out.

If you are putting in the bigger Bosch AL129x leave that bolt out until you install the alternator and get the belts on it. It makes it easier as you really have to push the alt against the side of the engine to get the belts on.
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  #4  
Old 01-18-2009, 09:41 PM
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Yes, bend the tab, but dont bend the threaded part. It will break a few k down the road if its bent at all.
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  #5  
Old 01-18-2009, 10:10 PM
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The true way to do it is to remove the whole assembly from the car, and unscrew the adjustment nut all the way until the threaded rod comes free of it, then there is just enough clearance to swing it out and remove the threaded bolt. Bending the forked end is not how its supposed to work!

Most of them are damaged or rusty at this point, and need to be replaced. I replaced mine because the end broke off while I was doing it. $50 for the threaded adjustment bolt, but it works SO much nicer when doing assembly/dis assembly.
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  #6  
Old 01-18-2009, 10:54 PM
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Thanks for the responses. I guess I'm left with some more questions:

1. Which "tab" do I bend? The forked one holding the screw or the flange?

Would it be easier to take the bracket off and get this done outside of the car?
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  #7  
Old 01-18-2009, 11:46 PM
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you bend the part that run parallel to the threaded part and points vertical. i used a drift and hammer. bend that back enough to allow the whole threaded bolt to pop out. when reassembling bend back to original position with a big set of channel lock pliers.

just did this last weekend...its all too familiar. do a search under my name and you'll see my account of the job.

dd
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  #8  
Old 01-19-2009, 09:58 AM
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Quote:
Originally Posted by Oracle12345 View Post
just take your time and look at the w126 service disc which tells you how

What is a w126 disc, and where would I find one?
Thanks


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1984 MB 300SD Turbo
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  #9  
Old 01-19-2009, 10:01 AM
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DO NOT BEND THE TAB!!!!!!

just take all the bolts out that hold the alternator, the plate with the tabs will slide off the adjuster bolt easily.

DO NOT BEND THE TAB!!!!!
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  #10  
Old 01-19-2009, 10:06 AM
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DieselDan-
Thanks for the heads up about your how-to thread, it's very informative.

VStech-
Great! I was hoping I didn't have to bend the ta since I am a klutz and will surely snap something. I have the bottom bolt off and am working on the driver's side top bolt. This should be enough to remove the alternator, right? The only other bolt I see is the one that is attached to the adjustment screw, and that can't come off until the alternator is out of the car.

Let me know if I am missing something or if I need to remove any other part of the car to get it all out.

Thanks again.
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  #11  
Old 01-19-2009, 10:50 AM
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Quote:
Originally Posted by Ryan Z View Post
What is a w126 disc, and where would I find one?
Thanks


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1984 MB 300SD Turbo
dealer, ebay, I can get you one as well
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  #12  
Old 01-19-2009, 10:54 AM
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Actually, it sounds as if you might be doing it in reverse sequence. Instead of trying to remove the adjusting bolt, crank it all the way in to release the tension on the belt. Then remove the bracket and alternator as a unit, held by the two large bolts at the block. Once removed, separate the bracket from the alternator. No bending required.

I also fought it the first time. Once I figured out that removing the bracket and alternator as a unit, it really simplified this task.
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  #13  
Old 07-31-2013, 09:48 PM
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right on!

Quote:
Originally Posted by SD Blue View Post
Actually, it sounds as if you might be doing it in reverse sequence. Instead of trying to remove the adjusting bolt, crank it all the way in to release the tension on the belt. Then remove the bracket and alternator as a unit, held by the two large bolts at the block. Once removed, separate the bracket from the alternator. No bending required.

I also fought it the first time. Once I figured out that removing the bracket and alternator as a unit, it really simplified this task.
One problem , the oil breather tube is in the way !!!
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  #14  
Old 07-31-2013, 11:52 PM
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Quote:
Originally Posted by Ryan Z View Post
What is a w126 disc, and where would I find one?
Thanks


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Untitled Document
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  #15  
Old 08-01-2013, 11:49 AM
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Mercedes Factory Service Manuals

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