Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[Gerry Archer]

I put a hex key socket/impact wrench on the shaft end, and a box end 
on the nut.  Got it up pretty close to 80 ft/lb and stopped when (cheap) 
allen key in end of shaft began to strip.  

Think maybe the 4 year old battery is bad since the cell hydrometer 
readings won't go up after charging a few hours.  Getting a new battery 
this PM.

Thanks,
Gerry

From: "Dieselhead" <126die...@gmail.com>
Yeah, I went through the same thing.  The answer was to just put the 
pulley on and tighten the nut.  Your number of 80 is about right.  I 
got mine as tight as i could, and it has been ok.



From: "Allan Streib" 

I use the rattle-wrench to remove and tighten the alternator pully nut.
I've had one (FLAPS-branded) rebuild come with a keyed shaft; the
Bosch rebuilds don't in my experience.  Doesn't seem to really matter
in practice.
Allan


On Fri, Jan 27, 2012, at 03:20 PM, Hendrik & Fay wrote:

Basically as tight as you can get it with a new spring washer fitted.
Had an pulley come loose because supposed auto sparky used old spring
washer, which was doing a very good impersonation of a flat washer.
Drove me batty trying to track down the noise it made because fan belt
transferred noise to other side of engine.

Hendrik who is batty enough

Gerry Archer wrote:
> Yep, they are stuck pretty tight.  Always used rebuilt alternators
> before which had keys.  This is the first new one.  Hope this one
> lasts longer than the rebuilts (the slip rings became grooved and
> the voltage became low on the rebuilts).  Can't find the torque for
> the shaft nut on alternators on the MB CD or 'net.  Seem to remember
> that the torque on American car alternators was about 110 Nm (80
> ft/lb).  Correct torque might be more important without a key.
> Thanks, Gerry


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Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[Dieselhead]

Yeah, I went through the same thing.  The answer was to just put the 
pulley on and tighten the nut.  Your number of 80 is about right.  I 
got mine as tight as i could, and it has been ok.




Yep, they are stuck pretty tight.  Always used rebuilt alternators before
which had keys.  This is the first new one.  Hope this one lasts
longer than the rebuilts (the slip rings became grooved and the voltage
became low on the rebuilts).  Can't find the torque for the shaft nut on
alternators on the MB CD or 'net.  Seem to remember that the torque on
American car alternators was about 110 Nm (80 ft/lb).  Correct torque
might be more important without a key.
Thanks,
Gerry


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Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[Allan Streib]

I use the rattle-wrench to remove and tighten the alternator pully nut.

I've had one (FLAPS-branded) rebuild come with a keyed shaft; the
Bosch rebuilds don't in my experience.  Doesn't seem to really matter
in practice.

Allan


On Fri, Jan 27, 2012, at 03:20 PM, Hendrik & Fay wrote:
> Basically as tight as you can get it with a new spring washer fitted.
> Had an pulley come loose because supposed auto sparky used old spring
> washer, which was doing a very good impersonation of a flat washer.
> Drove me batty trying to track down the noise it made because fan belt
> transferred noise to other side of engine.
>
> Hendrik who is batty enough
>
> Gerry Archer wrote:
> > Yep, they are stuck pretty tight.  Always used rebuilt alternators
> > before which had keys.  This is the first new one.  Hope this one
> > lasts longer than the rebuilts (the slip rings became grooved and
> > the voltage became low on the rebuilts).  Can't find the torque for
> > the shaft nut on alternators on the MB CD or 'net.  Seem to remember
> > that the torque on American car alternators was about 110 Nm (80
> > ft/lb).  Correct torque might be more important without a key.
> > Thanks, Gerry

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Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[Gerry Archer]

Guess that's what I'll have to do.
Thanks,
Gerry

From: "Hendrik & Fay" 

Basically as tight as you can get it with a new spring washer fitted.
Had an pulley come loose because supposed auto sparky used old spring 
washer, which was doing a very good impersonation of a flat washer.
Drove me batty trying to track down the noise it made because fan belt 
transferred noise to other side of engine.


Hendrik
who is batty enough

Gerry Archer wrote:

Yep, they are stuck pretty tight.  Always used rebuilt alternators before
which had keys.  This is the first new one.  Hope this one lasts
longer than the rebuilts (the slip rings became grooved and the voltage
became low on the rebuilts).  Can't find the torque for the shaft nut on
alternators on the MB CD or 'net.  Seem to remember that the torque on 
American car alternators was about 110 Nm (80 ft/lb).  Correct torque 
might be more important without a key.

Thanks,
Gerry





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Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[Hendrik & Fay]

Basically as tight as you can get it with a new spring washer fitted.
Had an pulley come loose because supposed auto sparky used old spring 
washer, which was doing a very good impersonation of a flat washer.
Drove me batty trying to track down the noise it made because fan belt 
transferred noise to other side of engine.


Hendrik
who is batty enough

Gerry Archer wrote:

Yep, they are stuck pretty tight.  Always used rebuilt alternators before
which had keys.  This is the first new one.  Hope this one lasts
longer than the rebuilts (the slip rings became grooved and the voltage
became low on the rebuilts).  Can't find the torque for the shaft nut on
alternators on the MB CD or 'net.  Seem to remember that the torque on 
American car alternators was about 110 Nm (80 ft/lb).  Correct torque 
might be more important without a key.

Thanks,
Gerry

  
  



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Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[Gerry Archer]

Yep, they are stuck pretty tight.  Always used rebuilt alternators before
which had keys.  This is the first new one.  Hope this one lasts
longer than the rebuilts (the slip rings became grooved and the voltage
became low on the rebuilts).  Can't find the torque for the shaft nut on
alternators on the MB CD or 'net.  Seem to remember that the torque on 
American car alternators was about 110 Nm (80 ft/lb).  Correct torque 
might be more important without a key.
Thanks,
Gerry

> Yes, I have. I have not seen a key on a Bosch alternator for a Mercedes 
> for
> a long time now. Taking the pulley off the old shaft will tell you that 
> you
> don't need a key ---
>
> On Thu, Jan 26, 2012 at 8:32 PM, Gerry Archer 
> wrote:
>
>> A new, factory, (not rebuilt), Bosch alternator for an '83 300D
>> came with no half-moon key slot in the shaft.  All else is the same
>> as the defective alternator.
>>
>> Factory booklet that came with alternator simply says to be sure
>> and use cars recommended torque on nut with no mention of key.
>>
>> In 65+ years of messing with cars, this is the first alternator/generator
>> shaft I've seen with no half-moon key.
>>
>> Anyone else encountered this?
>>
>> If Bosch is gambling on saving the cost of one machining operation,
>> it might be a good idea to put some sort of "glue" on the shaft/pulley
>> just in case.  Would "stop-nut" allow the pulley to be removed the
>> next time an alternator is needed?
>>
>> Thanks,
>>
>> Gerry
>>
>> __**_
>> http://www.okiebenz.com
>> For new and used parts go to www.okiebenz.com
>> To search list archives 
>> http://www.okiebenz.com/**archive/
>>
>> To Unsubscribe or change delivery options go to:
>> http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.com
>>
>
>
>
> -- 
> OK Don
> 2001 ML320
> 1992 300D 2.5T
> 1990 300D 2.5T
> 1997 Plymouth Grand Voyager
> ___
> http://www.okiebenz.com
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> Checked by AVG - www.avg.com
> Version: 10.0.1416 / Virus Database: 2109/4768 - Release Date: 01/26/12
> 
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Re: [MBZ] Missing half-moon key slot on new Bosch alternator

[OK Don]

Yes, I have. I have not seen a key on a Bosch alternator for a Mercedes for
a long time now. Taking the pulley off the old shaft will tell you that you
don't need a key ---

On Thu, Jan 26, 2012 at 8:32 PM, Gerry Archer wrote:

> A new, factory, (not rebuilt), Bosch alternator for an '83 300D
> came with no half-moon key slot in the shaft.  All else is the same
> as the defective alternator.
>
> Factory booklet that came with alternator simply says to be sure
> and use cars recommended torque on nut with no mention of key.
>
> In 65+ years of messing with cars, this is the first alternator/generator
> shaft I've seen with no half-moon key.
>
> Anyone else encountered this?
>
> If Bosch is gambling on saving the cost of one machining operation,
> it might be a good idea to put some sort of "glue" on the shaft/pulley
> just in case.  Would "stop-nut" allow the pulley to be removed the
> next time an alternator is needed?
>
> Thanks,
>
> Gerry
>
> __**_
> http://www.okiebenz.com
> For new and used parts go to www.okiebenz.com
> To search list archives 
> http://www.okiebenz.com/**archive/
>
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.com
>



-- 
OK Don
2001 ML320
1992 300D 2.5T
1990 300D 2.5T
1997 Plymouth Grand Voyager
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[MBZ] Missing half-moon key slot on new Bosch alternator

[Gerry Archer]

A new, factory, (not rebuilt), Bosch alternator for an '83 300D
came with no half-moon key slot in the shaft.  All else is the same
as the defective alternator.

Factory booklet that came with alternator simply says to be sure
and use cars recommended torque on nut with no mention of key.

In 65+ years of messing with cars, this is the first alternator/generator
shaft I've seen with no half-moon key.

Anyone else encountered this?

If Bosch is gambling on saving the cost of one machining operation,
it might be a good idea to put some sort of "glue" on the shaft/pulley
just in case.  Would "stop-nut" allow the pulley to be removed the
next time an alternator is needed?

Thanks,

Gerry

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