No Factory Service Manual for the 1980s 722.3 / 722.4 transmission? - PeachParts Mercedes-Benz Forum

WDBCB20 · #1 11-09-2020, 02:29 PM

Quote:

Originally Posted by 5cylinder

Slow day, snowing outside...

Every once in a while as I'm under my 1980s 300Ds and staring up at the transmission, I've wondered:
What would be Mercedes-Benz's explanation for why they never produced (that I am aware of) an official Factory Service Manual covering the innards of the 722.3 / 722.4 transmission?

I'm struggling to remember: Was it that the transmission was made by somebody else?

If anyone happens to have some insight on this, I'd appreciate learning the real story. Thanks-

I happen to have the original German version for the w126 on my computer.

It is as elaborate as Zulfiqar describes and more: It also has a separate entry for the manual transmissions, clutch and pedal assembly of those years.

Another advantage of the German (original) vs English version of the manual other than having the transmissions is the resolution of the photographs. Those are much clearer than the rather blurry ones in the English version.

Will be happy to make it available if you can suggest a painless (one or two mouse-click

) way to do so.

Or access BitTorrent and search "Werkstatt-Information Typ 123" (instead of typ 126 which is what I have) so you'll get the entire manual for your car.

5cylinder · #2 11-09-2020, 04:35 PM

Quote:

Originally Posted by WDBCB20

Or access BitTorrent and search "Werkstatt-Information Typ 123" (instead of typ 126 which is what I have) so you'll get the entire manual for your car.

Good suggestion I hadn't thought of.
So far, found the ATSG. The M-B transmission doc. I found (228 pages) appears to be in Russian by the look of it. I'll keep plugging away and see what turns up.

Thanks for the help.

Zulfiqar · #3 11-09-2020, 05:05 PM

Quote:

Originally Posted by WDBCB20

I happen to have the original German version for the w126 on my computer.

It is as elaborate as Zulfiqar describes and more: It also has a separate entry for the manual transmissions, clutch and pedal assembly of those years.

Another advantage of the German (original) vs English version of the manual other than having the transmissions is the resolution of the photographs. Those are much clearer than the rather blurry ones in the English version.

Will be happy to make it available if you can suggest a painless (one or two mouse-click

) way to do so.

Or access BitTorrent and search "Werkstatt-Information Typ 123" (instead of typ 126 which is what I have) so you'll get the entire manual for your car.

Oh yes, the pictures were very sharp - but the crazy level of information even for measuring the spring tension of small springs in the valve body was typically german. Extremely overshot in detail.

5cylinder · #4 11-09-2020, 05:19 PM

Quote:

Originally Posted by Zulfiqar

...but the crazy level of information even for measuring the spring tension of small springs in the valve body was typically german. Extremely overshot in detail.

Hah! SO funny. And so typical of the M-B engineers!

I laugh, admire, and pity them!

merc lover · #5 11-09-2020, 11:15 PM

Of course they are in German; I've been considering taking a language class to learn how to speak, read and write the German language.

Siemens AG makes some of the world's most advanced medical imaging systems. If you ever get the chance to have a technician remove the front cover from a Siemens dual head cat scanner, it will take your breath away. The machine has the ability to take X-ray "slices" of the body.

The dual X-ray heads rotate around the gantry and can slice the body into just over 1600 degrees of a circle (I used to know the exact number but it has been awhile since I've seen one torn down).

Another example of superior german engineering is the heidelberg printing press. It has some type of specially engineered oil bath that allows it to operate longer with little maintenance required. Apparently, the japanese aren't even close......