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  #1  
Old 11-22-2011, 03:52 PM
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Automatic transmission experts, how to remove the stator shaft?

After replacing the seal ring I noticed that my stator shaft got damaged splines. I decided to replace it, but not exactly sure how to remove it first.
I read that there are two versions, one that just pressed in and another one that uses the circlip to hold in in place, though I'm not sure if it applies to my transmission.
I got 722.0 (W3A040)


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  #2  
Old 11-22-2011, 05:16 PM
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Bummer - I didn't need to remove that bit when I did my 722.1...

With a 722.0 you've got a double eared starter hole bell housing haven't you? If so that makes it difficult to get a good second hand spare.

Have you pulled the bearing off of the other side of the bell housing yet?

Perhaps then it will be clearer on how to remove the stator shaft? My guess is that it is an interference fit in the bell housing casting.

For the record the ATSG manual I've got doesn't show how to remove it.

I can check the German FSM for you tomorrow (if no one else has shown the light by then)
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!
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  #3  
Old 11-24-2011, 02:27 AM
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Quote:
Originally Posted by Army View Post
Bummer - I didn't need to remove that bit when I did my 722.1...

With a 722.0 you've got a double eared starter hole bell housing haven't you? If so that makes it difficult to get a good second hand spare.
Yeah, it's a double eared bell housing.

Quote:
Originally Posted by Army View Post
Have you pulled the bearing off of the other side of the bell housing yet?
Perhaps then it will be clearer on how to remove the stator shaft? My guess is that it is an interference fit in the bell housing casting.
No, I did not remove the bearing. Did not want to do extra work.

Quote:
Originally Posted by Army View Post
I can check the German FSM for you tomorrow (if no one else has shown the light by then)
Please check.

What confuses me is that in the MB parts catalog it shows the stator shaft with a clip ring. I definitely do not have it.



I checked my transmission serial number and it matches my data card. There is a part number stamped on the bell housing and I could not find it anywhere. Is it possible that the bell housing was replaced at some point?
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Old 11-24-2011, 05:38 AM
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That should be replaced everytime you strip one down. it's a common failure point on high mileage cars. it's not the actual spigot that fails,but the teeth come off and travel through the trans.... i have seen the entire guts of a 722-003 completely destroyed because all the teeth came off.
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  #5  
Old 11-24-2011, 07:54 AM
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@SickFinga

With reference to the picture you posted - does the description of the part number 23 actually say that it is the hollow shaft? Because to me it looks like a shaft that goes inside the hollow shaft as the hollow shaft seems to be fitted to the bell housing (in the picture). The circlip is a puzzle. The closest circlip to that area that I know of in a 722.1 is the circlip that holds the front planet assembly in place on the intermediate shaft.

The "torque converter" in this picture also looks different from the torque converter fitted to a 722.1 - is it perhaps a picture of a fluid coupling? Is this picture perhaps based on the fluid coupling transmissions that came before the 722.0XX and 722.1XX transmissions? (Sorry I don't know what they are called I'm still quite new to this)
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!
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  #6  
Old 11-24-2011, 07:59 AM
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I've just had a look on EverythingBenz - Mercedes-Benz Forum and Web Search Using Google and found the same picture on the Russian EPC - and part number 23 is labeled as "shaft - stator shaft"

I'll fire up Windows and see if I can make some progress on the German FSM I've got.
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!
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  #7  
Old 11-24-2011, 08:15 AM
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Sorry I should have known better my German FSM starts with the 722.1 - I haven't got any 722.0 information other than that in the ATSG.

Sorry this isn't helping is it?

Perhaps mercmad6.3 has an idea on how to do the job?

My vote would be to remove the bearing on the back of the bell housing and see if there was an obvious press fit joint there. If so press it out with a bench press - no hammer and drift work here! However before doing so I'd check with the dealer or Phil at fastlane to see if spares are available. They might also be able to shed some light on this circlip in the picture.

Having learned a little bit about the two different "early" and "late" modulating pressure systems on the 722.118 transmission it wouldn't surprise me if "early" 722.0XX transmissions had a different front end configuration from the "later" ones AND MERCEDES STILL KEPT THE SAME transmission type number!
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!

Last edited by Stretch; 11-24-2011 at 09:00 AM. Reason: Added some more
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  #8  
Old 11-24-2011, 01:42 PM
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Quote:
Originally Posted by Army View Post
@SickFinga With reference to the picture you posted - does the description of the part number 23 actually say that it is the hollow shaft? Because to me it looks like a shaft that goes inside the hollow shaft as the hollow shaft seems to be fitted to the bell housing (in the picture).
OK, now I'm confused. I assumed that stator shaft and hollow shaft is the same thing. I just looked at the parts catalog again and I found stator shaft and hollow shaft and they got different part numbers.
1. Part 23 - Stator shaft

2. Part 150 - Hollow shaft. If we were to believe the picture those two parts look identical. So what do I need exactly?

Quote:
Originally Posted by Army View Post
The "torque converter" in this picture also looks different from the torque converter fitted to a 722.1 - is it perhaps a picture of a fluid coupling? Is this picture perhaps based on the fluid coupling transmissions that came before the 722.0XX and 722.1XX transmissions? (Sorry I don't know what they are called I'm still quite new to this)
Converter looks the same as I got. I think that picture is misleading because it's pretty small and it is shown with the starter ring. Here is the same converter in the clutch section.
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  #9  
Old 11-24-2011, 01:57 PM
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I really don't know - I agree with you that shaft number 23 in the first picture and number 150 in the other picture look alike...

These guys (in Holland) who repair transmissions have this handy parts diagram in PDF format on their web site

http://www.ganzeboom.net/images1/ganzeboom/parts/Mercedes/722.0,%20722.1,%20722.2.pdf

Note that they lump the 722.0, the 722.1, and the 722.2 all together in one PDF

You'll not see an equivalent part number 23 with a circlip positioned in front of the front pump there...

Could EPC be wrong? The ripped off EPC on the Russian site has the same information as the stuff you've just posted.

I've got a nasty feeling that even if part 23 was still available to buy it would be the wrong part. But it is only my feeling. I recommend you get in touch with Phil at Fastlane to see if he can shed some light on this problem.



EDIT:- I forgot to say I did check out the German FSM for the 722.1 trans and there is also no mention of removing and refitting the stator shaft in the bell housing.
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!
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  #10  
Old 11-24-2011, 04:16 PM
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I've seen that PDF, the ring is actually on the shaft.



It's strange actually. If there is a ring, how am I supposed to compress it when it's in the bell housing.
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  #11  
Old 11-25-2011, 11:57 AM
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I think that ring is on the other side of the bell housing. Look at how the shaft is stepped. The right hand side of the picture is the diameter onto which the bearing is fitted.

Starting from the right it looks like you've got bearing => ring => bell housing.

I was thinking with my current cash situation - I'd take a gamble for 50 USD and just go and order part 23 and see if it was the right one. It might not be what you want but at least if you went to a dealer "not knowing exactly" which bit you need but with a copy of the picture you posted above they might even be willing to refund your cash 'cos "they" got it wrong. That wouldn't happen here - but may be where you are?
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!
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