To clarify -- the governor is what the aux pump connects to?

Once I get her home I'll take the pump off again to try and figure out what's going on.

I'm just hoping I don't need to rebuild the whole thing...:(

Indeed !The forum is to help and assist, not to....

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I worked with him on this.
We did not remove the governer, only the secondary pump that engages the square drive peg on the end of the governer shaft.

I have just looked thru both the ATSG PDF and a Mercedes factory PDF, and nowhere is there a mention of lining up the pump and governer drive. In fact the way it is set up, the drive gear is spring-loaded, as as soon as the governer rotates it would engage.
This is NOT like the front pump/TC setup, that MUST be correctly positioned.

One thing I did spot that we may have missed, is that there is a small threaded shaft called the "Axial Support" that passes thru the secondary pump, and is secured with a nut. The end of this shaft has a small slot in the end, and in one of the manuals(which I just found) it mentions making sure that the slot is horizontal... There is only about 45deg or less movement in this shaft, and its slot, and horizontal is at its maximum clockwise position.

Whilst tightening the nut would rotate the shaft to its stop position... which would be horizontal, I am unsure where we set it, as I only just fornd that info...
Anyone know what the Axial Support does?

I am also concerned about a failure of the Kickdown Solenoid...
Anyone know if it fails in the open position, and what the result would be?

What I find odd, is the way this problem manifested itself... The drive was uneventful, and almost 300 miles long before he slowed down, and only then did the trans start acting up...

Bang goes the governor theory then - though a dodgy one might explain some of the other problems your son has been experiencing (see the other posts).


Anyway I can't see the axial support in the ATSG manual (I'm on page 31 and 32 at the moment looking at the secondary pump removal and installation)...

and I can't see it on the parts diagram here =>

http://www.ganzeboom.net/images1/ganzeboom/parts/Mercedes/722.3,%20722.4.pdf

Can you post some more information on it or tell me which part number it is in the pdf file posted above?

In a worst case scenario I can take a 722.303 to bits at quite short notice to get some pictures for you guys if you need 'em. Stripping that one down is on the to do list anyway - I can just bump it up the list if you think it might help.

To eliminate the kick down solenoid you should just have to disconnect it. It you are worried that it is sticking they seem to be pretty simple things. Just remove clean and inspect - bit of grease if you want to be 100% sure it is moving as it should.

Awesome link thanks!

OK, OK...
Now I am seeing a possibilty...
The Axial support is part #687 on the last page #68.
Its on the LH side of the trans grouped with the Govenor assy..

Now I think I can see what it does and the possibility of that being the issue...

Looks like when the slot in it is rotated to the horizontal position, the fork on the opposite end rotates, and is the keeper that holds the govenor shaft.
So, it keeps the Govenor in the correct position.

Its possible the govenor is out of position, and thats why this happened.
My biggest concern is that the govenor or its gear... or the drive gear on the output shaft is damaged...

Where we went wrong was not reading the Govenor removal section.... as we were not removing the govenor!

The only time you don't make mistakes, is when you don't do anything... and as the boss's or women in our lives will tell you... that is just as bad!

Anyway, Ps2cho is onroute home with the TE on a flatbed behind him..
I am sure he will be posting a thread on what the result will be...

Ph2cho, Huge bummer! I currently have my tranny down and just did a partial rebuild. I'll be re-installing it later this week. Your post and site have been a great help. If mine goes belly up then I've lost 250 bucks in parts and time. Then I'll just buy a rebuilt tranny. Good luck and let us know the outcome.

The 300TE is the garage safe and sound now...so I got under the car to try again.

http://www.w124-zone.com/downloads/p...on/diagram.jpg

So you can all see it. #43 + 44 show the different positions.

I took off the nut and attempted to get it to lock in place, but was unsuccessful. I am not sure if its a tight fit, or I need a better tool, I don't know. Maybe someone who has done this step can pipe in and say how they did it or if it was tight.

Are you guys now planning to remove the governor and start over?

(It seems like a plan to me)

That's the plan for me. Gotta unbolt exhaust to drop tranny down. Just not enough space...

I really need to confirm the gov is not stripped.

I am reading there is snap ring inboard that requires an mb tool to release...any alternative?

Removed the governor from my 91 300D a few years ago. I know the clip was a little hard to get to but I used needle nose plyers and long thin screw drivers. I found the gear broken (plastic). Cost of part was less than $2 before tax from dealer. My car has 1st gear start so it stayed in 1st. Remove the rear crossmember and let trans drop as far as it will. Push the trans as far as posible to the right side of the car and put a block of wood somrwhere to hold it there. Remove the snap ring that holds the gov cover and remove the cover. Try to turn the gov and if it turns than you have found the problem.

It is very important that you keep the gov clean. Also, If the gear is broken or stripped than check the rear pump before you reinstall the gov. The gov gear also drives the rear pump.

That is all I remember from when I had mine out. That was about 5 years ago.

Paul

Thanks! So its possible to get the governor out just by pushing the transmission to the side? Is there enough space to get the clip with screwdrivers then?

I'll give it a shot and see what I can do.

If you have a spare hand - perhaps you can take some pictures for us?

I have had two incidences with the governor and secondary pump in two of my cars. Since it sounds like the axial support was not in the right position, it allows the governor to move back and forth, once the car was brought out to speed the the governor will stay in position, but if slowed down and put in lowerr gear the governor will move around. On the opposite side of secondary oil pump sits the governor, there is a cover over the governor, This is where the governor is most likely pushed against and is stuck. There is a gear on the governor which if metal would of broke the small pin located on the governor making the governor rotate freely not up-shift. If the gear is plastic it would of broke and will need to be replaced. The car will have to be towed or driven in 2nd gear to a shop, the transmission will have to come out to open up the rear end of the trans and assess the damage.

Any Question, just Ask
Sean

Alright, I tried to get that governor cover off and it won't budge in!! Unless its supposed to be tough? All of the rest of those covers press in 1/2in, but this wont.

My thinking is that the governor is pressed up against the cover. So I went first to the pump to check it:


Phew...looks OK!! Seems that the pump engaged fine, so its gotta be with the governor and I HOPE that since I don't see any damage, the governor just slipped sideways towards the drivers side and no damage occurred.

I tried to get a photo of the output shaft of the gov but its pressed in (AGAIN, strong indication its too far over.) I couldn't get a good photo, but it looked okay too.

http://www.w124-zone.com/downloads/p...n/recheck1.jpg

http://www.w124-zone.com/downloads/p...n/recheck2.jpg

Got it now!

What do ya know...governor spins :)

I'm thinking the diagnosis was correct!

http://www.w124-zone.com/downloads/p...n/recheck3.jpg

Gonna try now and get the governor out without dropping exhaust, and if not I may just try and reposition the governor, lock it down and give it a shot.
Curious though why there seems to be rust? Does this end of the governor not get fluid?

I am trying to find what position/orientation the governor is supposed to be in when reinstalled. Anybody know?