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 6.9
 Auxiliary trans pump pulley
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daantjie

Canada
896 Posts

Posted - 09/13/2017 :  13:16:52  Show Profile  Reply with Quote
Hi guys

Anybody perhaps have the specs on the pulley on the aux. trans pump fitted on US/Aus models?

My pulley took a hit and is now vibrating of course, so I really don't want the pump to go tits up because of this

Hoping this pulley is "off the shelf" but I am guessing chances of this are slim?

Cheers


Daniel
1977 450 SEL 6.9
Vancouver, BC

MattR

USA
91 Posts

Posted - 09/13/2017 :  20:34:00  Show Profile  Reply with Quote
How necessary is it? My car has one, but I don't believe it's hooked up (because the previous owner said they were needed in Cali/Az/hot places).

----------------
1976 450SE 6.9
aka Frankenbenz
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daantjie

Canada
896 Posts

Posted - 09/13/2017 :  21:59:45  Show Profile  Reply with Quote
I think it was meant for hot climates to rapidly cool the fluid if for instance you are sitting in creeping traffic.
I would not bypass mine even though it rarely gets very hot here.
You need to make sure the bypass circuit is hooked up correctly as improper fluid flow can cause transmission failure.

Daniel
1977 450 SEL 6.9
Vancouver, BC
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MattR

USA
91 Posts

Posted - 09/13/2017 :  22:42:26  Show Profile  Reply with Quote
Well, my current transmission is leaking fluid, so swapping it with a rebuilt unit is already on the docket for this winter or next Spring (depending on time and cash). I'll make sure to give that a thorough look-over then.

----------------
1976 450SE 6.9
aka Frankenbenz
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RANDYS

Australia
487 Posts

Posted - 09/14/2017 :  05:09:42  Show Profile  Reply with Quote
Take the pump off..take the pulley off..have a new one made.
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daantjie

Canada
896 Posts

Posted - 09/14/2017 :  11:15:44  Show Profile  Reply with Quote
Might come to that.

Pulley is NLA of course

Daniel
1977 450 SEL 6.9
Vancouver, BC
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njv

Australia
40 Posts

Posted - 09/15/2017 :  09:53:07  Show Profile  Reply with Quote
have you got a pic of the pulley D?

79 6.9s
#6436
#6290
#6181
#4764
#1741
#3096 (wrecked)
#902 (wrecked)
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daantjie

Canada
896 Posts

Posted - 09/15/2017 :  11:25:04  Show Profile  Reply with Quote
Will snap one when I get home, cheers.

Daniel
1977 450 SEL 6.9
Vancouver, BC
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daantjie

Canada
896 Posts

Posted - 09/15/2017 :  13:37:40  Show Profile  Reply with Quote
Here is a schematic from the service manual in the meantime:




Daniel
1977 450 SEL 6.9
Vancouver, BC





Edited by - daantjie on 09/15/2017 13:42:41
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daantjie

Canada
896 Posts

Posted - 09/15/2017 :  13:43:59  Show Profile  Reply with Quote
Not the best as I had to convert from pdf to jpeg

Daniel
1977 450 SEL 6.9
Vancouver, BC

Edited by - daantjie on 09/15/2017 13:45:05
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daantjie

Canada
896 Posts

Posted - 09/18/2017 :  10:36:32  Show Profile  Reply with Quote
Here is a pic as well. You will see that that in the bottom left of the pic there is a section missing. Car dropped low after my accident in 2015 due to the hydro lines being severed, and the tow truck driver had no choice but to drag it onto the flatbed. In the process the trans cooler lines also got severed. Oodles of fun...







Daniel
1977 450 SEL 6.9
Vancouver, BC

Edited by - daantjie on 09/18/2017 10:40:48
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amjady

USA
105 Posts

Posted - 09/18/2017 :  18:17:59  Show Profile  Reply with Quote
I don't suppose that pump/pulley was also on a '76 450sel (non 6.9)? If so. I Have an unmolested parts car that will have one you are welcome to.

Jed
Detroit, Michigan

1974 Porsche 914 1.8
1971 Vw Karmann Ghia Coupe
1998 Porsche Boxster
2001 Jaguar XKR Silverstone
2004 Mercedes G500
1972 Mercedes 280SEL 4.5 (under restoration)
1967 300SEL M189
1979 Mercedes 6.9 #5206
1979 Mercedes 6.9 #6424 (pending restoration)
1976 Mercedes 6.9 #484 (parts? vs restoration?)
1984 Bentley Mulsanne
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daantjie

Canada
896 Posts

Posted - 09/18/2017 :  20:07:39  Show Profile  Reply with Quote
Thanks Jed, yup this puppy is actually quite a rare part. Only on the 6.9 and only on US/Australia delivered cars.

Not sure what happened to my pic, this site seem to have a mind of it's own

Daniel
1977 450 SEL 6.9
Vancouver, BC
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rumb

USA
24 Posts

Posted - 09/20/2017 :  14:59:26  Show Profile  Reply with Quote
a good machine shop should be able to weld back the missing area and then put on a lathe to reshape.

probable cost a good penny though.

If you want to keep the car original then follow that path, if not, I dont really think the car requires it. All the euro's dont have the part on it anyway.

If you need something there to tension a belt i think I have an extra pully and bracket that tightens the ac compressor belt.

rumb
68 250S, 77 450SEL 6.9, 91 300SE, 98 SL500, 14 CLS550
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daantjie

Canada
896 Posts

Posted - 09/20/2017 :  15:06:39  Show Profile  Reply with Quote
Thanks Robert
Local machine shop gave me ballpark number of 200 bucks to turn a brand new one which I guess is not too rough.
Putting the car away pretty much until Spring next year so it will go into " the never-ending list"...


Daniel
1977 450 SEL 6.9
Vancouver, BC

Edited by - daantjie on 09/20/2017 15:08:08
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styria

Australia
225 Posts

Posted - 09/25/2017 :  17:20:57  Show Profile  Visit styria's Homepage  Reply with Quote
quote:
Originally posted by rumb

a good machine shop should be able to weld back the missing area and then put on a lathe to reshape.

probable cost a good penny though.

If you want to keep the car original then follow that path, if not, I dont really think the car requires it. All the euro's dont have the part on it anyway.

If you need something there to tension a belt i think I have an extra pully and bracket that tightens the ac compressor belt.

Transmissions fitted to Euro and high compression engines have different transmission terminals. On account of that, here was no need for the additional pump and pulley. Regards Styria


rumb
68 250S, 77 450SEL 6.9, 91 300SE, 98 SL500, 14 CLS550



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