Alternator belt - help!

1979-1991 280SE, 300SE, 300SEL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SEL, 560SEC
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Twigz
Dernburg Wagon
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Joined: Wed 14 Feb, 2018 12:37 am
Model you own: w126
Region: Western Australia
Location: Albany

Alternator belt - help!

Post by Twigz » Fri 31 Aug, 2018 5:18 pm

My 280SE recently snapped the alternator belt, so I've done the process of changing it, however I've run into a problem. The book at the parts store lists two different sized belts - 11A0965 and 11A0980. I got both. The 965 wouldn't fit on at all, and the 980 still slips even when the alternator is at the end of its adjustment rail. Have I done something wrong, or is it supposed to be a different belt?
1985 280SE - daily driver

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Bartman4800
300 SLR
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Model you own: w111
Location: Perth WA

Re: Alternator belt - help!

Post by Bartman4800 » Fri 31 Aug, 2018 7:10 pm

With the shortest belt, you might have to take out the adjustment bolt, slip the belt on and reinstall the bolt.

If they have a size in between, that might serve your purpose.

If you lived a bit closer to Rockingham, you could pick one up from me for 5 bucks; I got my hands on 100 different sizes...


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
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2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
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Twigz
Dernburg Wagon
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Model you own: w126
Region: Western Australia
Location: Albany

Re: Alternator belt - help!

Post by Twigz » Sun 16 Sep, 2018 3:36 pm

There's literally no way the 965 will fit, and the 980 squeals. And there's no 11mm belts in between 965 and 980. I've tried everything, but it won't go on.
1985 280SE - daily driver

Henry Schuman
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Re: Alternator belt - help!

Post by Henry Schuman » Mon 17 Sep, 2018 12:40 am

DAYCO # 15385 will solve your problem available here and maybe somewhere in OZ Ville I dunno
https://www.amazon.com/s/ref=nb_sb_noss ... dayco+belt
Don't Squat With Your Spurs On !!!!

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Christo C
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Re: Alternator belt - help!

Post by Christo C » Mon 17 Sep, 2018 8:33 am

Excuse my ignorance, but I would try the tighter belt and a lot of force to get it on.... even with soap (which you can wash off later).
~Christo
1986 230E W124.023 M102.982 ~290,000km Thistle Green Saloon "Janis"

CraigB
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Re: Alternator belt - help!

Post by CraigB » Mon 17 Sep, 2018 10:34 am

Obviously though it would seem something is not quite right and possibly linked to the snapping of the old belt - never snapped a belt myself in 40 or so years. And obviously with million or two of these M110 motors drifting around over the years, the stated belts will be correct. I'm guessing that belt does water pump, crank, alternator, so the only thing i can think of is that it is not the correct alternator or incorrect adjusting bracket (if they have one) - I don't know the motor and just trying to help with logical thought. Albany is not exactly Perth but the member Giles used to have your motor in earlier car and sometimes has bits. I wonder if you took a photo or he did if that narrows things down. Better still another W126 280 owner. I just have trouble believing that there is not a fan belt readily available to fit an M110 motor and there must be something more behind this. If you can stretch one on you don't want it to break again was the trigger for me speaking up.
Craig Baulderstone
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Henry Schuman
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Re: Alternator belt - help!

Post by Henry Schuman » Tue 18 Sep, 2018 3:09 am

Christo C wrote:
Mon 17 Sep, 2018 8:33 am
Excuse my ignorance, but I would try the tighter belt and a lot of force to get it on.... even with soap (which you can wash off later).
No ignorance implied however.......
Forcing a Wrong Fit Belt can do damage to Edge of belt ,over stressing bearing in alt and water pump.
I have run into this dilema on several occasions in the past and My Dayco
(OLD ISSUE ) calls for a 15385 on that Engine as well as a 15380 but it is U.S.A. version
Don't Squat With Your Spurs On !!!!

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