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Alternator removal on w126
Just bought a floor jack and have jack stands so I can get underneath if I need to. Where do you suppor the front end on jack stands safely and so as not to damage car?
Is the belt tensioner that hex shaped bolt on the front and top of the alternator? I know I need to let off belt tension before I unbolt the thing. Then once I do that, it looked like two bolts? And then unplug? I have the two belt pully. I suppose pully removal is just remove nut and slide off. Then reinstall is the reverse. Do I need to change pully if it is flat and true? How much deflection should there be in belts once I tighten them back? Seems like about 3/4 of an inch right now.
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup |
#2
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brush pack
Indy mechanic said brush pack with voltage regulator is one single unit and that he frequently saw "rebuilt" alternators with aftermarket brush packs and alternators instead of Bosch that only lasted less than a year.
Mine was rebuilt 7mos ago with aftermarket part at an auto electric shop out of town. It's under warranty, but all he is going to do is put aftermarket back in. Bosch brush pack with regulator is only $66 at dealer. Unless rectifier has gone bad. Hard to say. Rebuilt alt. is $150.
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup |
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Regualtor and brush pack here on fastlane is only $20 (F4010-108169) IMHO would look at replacing those as opposed to pulling alternator off.
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
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Willrev
The alt. is held on by three bolts one is the tightner for the ajustor.I did not need to jack up the car to remove the alt. The one bolt on the bottom can be reached from under the front, the other two from the top side. you won't be able to see but you can feel the bolts to remove. Not that big of a deal. pulley comes off easy, use a impack wrench to remove and install nut makes it easyer. 1 remove air plastic horn 2 unhook battery cable 3 unplug wire back alt. 4 undue bolt that holds ajuster 5 back off ajustor 6 remove other alt bolts 7 remove alt from the bottom 8 remove bolt and spacer and braket from alt. look to see how braket is install on alt. 9 remove pulley 10 reinstall in same order You need a 17 mm 3/8 th drive and 17mm box end wrench also a 17 mm 1/2 drive for the bottom bolt. Bill
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94 dodge cummings,86 ford 6.9,75 mbz 240d[ sold], 82 mbz 300sd,83 mbz 300sd |
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I just repaired the mounting bracket on my 123 alternator this weekend. And the procedure is the same.
Just make sure that you loosen all three bolts. (2 mounting bolts and the adjuster tightening bolt). The PO of my car aparently didn't bother on several occasions and the bracket was bent up to the point that the alternator could not be adjusted loose enough to remove or put on belts.
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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter. '84 300D Turbo 240k (Anthracite Grey) - Garage Queen '83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver I'm not a certified mechanic, but I did stay at a HolidayInn Express last night. |
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As stated above, can not stress enough to make sure it is ALL BOSCH!! I do not care if the aftermarket is free! In a jam while out of town, I had an aftermarket put in for $400!!! Lasted 3 months, after alot of complaining and driving back in another car for two hours, they swaped me a Bosch (my labor to take it off and on). No problems since (4 years ago). Anyting electrical for me will be Bosch!
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1993 Mercedes Benz 300D 2.5 205K (ex wife's) 1984 Mercedes Benz 300SD 320K (SOLD) 2004 Mercedes Benz C240 75K 1995 GMC Sierra 2WD 5.7L 188K 1983 Mercedes Benz 300SD 239K (SOLD) 1987 BMW 325i 220K (SOLD FOR SALVAGE) 609 Certification |
#7
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Quote:
Make sure that you loosen all 3 bolts that mount the alternator BEFORE you unscrew the adjuster bolt that is 90 degrees to the 3 mounting bolts. Without loosening the 3 bolts the assembly will not rotate and you will bend the adjuster shaft bolt. so loosen all 3 mounting bolts and then loosen the adjuster bolt. Once the belt can slip off then remove the 3 mounting bolts to remove the whole assembly. Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car |
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