carburetor and air cleaner connection tube

Still researching what I have with a recently acquired 1937 ZTU. My Parts Manual indicates after engine number 74917 the carburetor was changed from a TRX 12 to a TSX 97. Since my engine serial number is 76722, the TSX 97 it has is in fact the correct carburetor. However what is the correct tube extending up to the air breather? The TRX 12 has a bolt together connection, but the TSX 97 receives a hose. is there a replacement tube for a hose connection? Thanks again for your thoughts.

Do you have a picture of your tractor you could share. This is my tractor with a TRX 12.

Hi Jerry, there are a couple bits of information that can help us out here. This is your unit and you do what you want. You take the restoration as deep as you want. We're here to help.

#1 Do you want to get this unit back to original condition based upon chassis serial number (ie...correct police)? Chassis serial number would more than likely be the number you want to go by versus engine number. I say that as MM used the RE engine through the entire ZT series as well as in power units and combines. It is not uncommon to see the engines swapped out when they wear out.

#2 Is your air cleaner mounted on the left or right side of the engine? This is important as it will determine what kind of hookups from the carb to air cleaner you use. One set up is nothing but hoses and the other is flanges then a hose.

Let us know and we will help.

Aaron

The first two videos are of the same restoration by a young man that is on here. If memory serves me correctly, he did it for an FFA project and it is a chassis serial number correct restoration and he did a great job.

https://www.youtube.com/watch?v=IeekVF8xRD0&index=2&list=PLA68A9B34EF467443
https://www.youtube.com/watch?v=S_enOyRqoJY&index=3&list=PLA68A9B34EF467443
well.
https://www.youtube.com/watch?v=Pne323HId4M&index=4&list=PLA68A9B34EF467443
The next video is of another restoration that is excellent as

This last video is of a later ZT but you get some good views of the engine compartment (carb & air cleaner position, etc) on all 4 videos.
https://www.youtube.com/watch?v=VN8qPZbCZo4&index=22&list=PLA68A9B34EF467443

Hope this helps for now. Again, just let us know your thoughts.

asparl; I just acquired a 1947 Z and the last video you supplied showed the air-cleaner tube, a
welded pipe. Do you think that was original as the one I just purchased looks similar to the one in the
video.

Motor may have been changed. Up until 1940 Z's had breather on left. They used a long steel flanged pipe for breather to flange on tr12 carb. Tsx had a hose to breather on right.

HI Roger, according to the ZT parts book, the TSX-97 carb was used on chassis serial numbers beginning in '47 and through the end of '48. You are correct in seeing the last video having a steel/welded pipe between the carb and the air cleaner with a short section of hose clamped on both ends, top and bottom. If you wish to get technical, according to the ZT parts book, the hose for the '47 and '48 ZTs is a rubber hose and is the same as on the ZA series tractors. Hopefully the below link will work where you can see the hose itself. The air cleaner is changed beginning in the ZA series as well, but still on the right side of the engine.

As an FYI, when using the TRX-12 carb with an air cleaner on the right side, you use the same hose but cut the bottom elbow off as the carb has a flange that accepts a cast elbow flange where the bottom hose goes on.

I have seen many Rs and Zs with what may be considered an accordion style flexible hose because they are readily available at an auto parts store, not sure on price, but they are flexible. No harm no foul, as long as they work, do it to it.

Although that is "technical...according to the parts book," the tractors are yours and if you find a hose/pipe/ or combo that works for you, go for it. Yes there are some correct police out there, which for my particular unit ('40 ZTU), yes I am doing it that way. However, I, like many other people on here, are simply tickled to death to see new machines saved and put in the hands of a collector. Let's also remember, as referenced a couple different times in this thread, it was not uncommon to have an RE engine swapped in and out of machines. Likewise, I have been told by a handful of "old timers" MM did a good job of mixing parts when they were concluding one series and moving on to the next one as in superseding one another.

I hope this helps and the name of the game is have fun.

"Opinions are like eyeballs, [u:a84926bb5a]most[/u:a84926bb5a] people start with at least two."

Feel free to P.M. me if you would like and we can swap numbers and talk on the phone.

Aaron

http://www.agcopartsbooks.com/PartsBooksN/Viewer/book.aspx?book=agco/r1072d00

I appreciate all the comments. I am pretty sure the engine in my 1937 Z is the original since the air cleaner is still on the left side and it still has a magneto and no electrics. Another feature though is that the engine has a cap for where a starter could go. The very nice FFA project tractor in the video which I had studied before has no such hole. The picture of the Z in this thread has a starter. Both tractors do have the TRX 12 carb bolted to the tube. None of this is for certain though since I do not know when my engine number 76722 was built. The metal tube is running from the carburetor to the other side of the tractor to the air cleaner. The bolt together flange on the tube may have been cut off to accommodate the short 3 inch hose from the TSX 97 carburetor. My original question was intended to ask if there was ever a tube designed to accommodate a TSX 97 carb with the air cleaner on the left side? If not, I may find a hose with a bend in it to account for the tube as it rises up over the engine. My email is noted above and my cell number is 209-614-6329. I would love to visit with any of you. Thanks again.

Jerry, Thank you for your additional message. I apologize if I got off track a bit with the info I provided. The ZTU on steel wheels in the videos has a very early RE crankcase that does not have the starter hole cut out of it. A very unique attribute to that machine if you ask me.

I have attached a photo of the crankcase starter hole cover I have on my 1940 tractor. The cover is simply held in place by a j-bolt that hooks to the inside lip of the hole. My engine has been replaced out of a combine at some point. I have all the electrical components but haven't put it on yet since it hand cranks so easy. But, I turn 41 this year and need to "do things smarter not harder."

To address your intended original question, there is no Moline factory hose that would connect the later TSX-97 carb to the air cleaner as it sits on the left side of the engine. When the air cleaner was switched to the right side mid-1940, they still used the TRX-12 carb through '46, switching to the TSX-97 in '47. I think you would be safe in using some sort of accordion hose from an auto parts store.

Jerry, After sending the last post it got me thinking I thought I had documented the information about the RE engine serial numbers in my parts book. I did locate it but will not take credit for it as that goes to Tony Turner on his website. All I did was copy and paste the info taken from his site that I save in my book.

With you mentioning you engine serial number is 76722, it appears your engine may be a 1947 model which replaced the original one for one reason or another. It would certainly give understanding to the TSX-97 carb as well, not that it couldn't have been changed as well. My guess would be the original engine was removed, the current one installed, and the original air cleaner put back on. As referenced a couple different times in this thread, the swapping of engines was not uncommon.

**The serial number breakdowns were copied directly out of the parts book although we understand it may not be 100% "gospel."

Hope this helps and have fun playing with it.


RE Engine Serial Number
36-43 ******* 40051-62741
1944 ******** 62742-68140
1945 ******** 68141-71340
1946 ******** 71341-72606
1946 ******** 72607-73107
1947 ******** 74917-81509
1948 ******** 81510-87378

40051-47863 Fairbanks Morse RV magneto
47864-73511 Fairbanks Morse FMK-4B magneto
73512-74911 Delco Remy 1111506 Distributor
74912-87378 Fairbanks Morse FMK-4B magneto

40051-74916 TRX-12 carburetor
74917-87378 TSX-97 carburetor

Alsparl I was looking that the RE engine S/N list and it appears to have a gap from 73108 to 74916. Is it possible these are 1946 also? The info on the carbs indicates 74916 as the last of the TRX-12 carbs. and mention was made of them thru 1946? Just curious.
Bryce]

Shinnery, Thank you for pointing out my omission. Obviously I need to double check things are correct when I post late at night.

I went back to Tony's site this morning and pulled the information directly from there instead of relying on my written documentation from many moons ago. Hope this clarifies my errors and I apologize for the confusion. The information is below.

RE ENGINES
----------
1944 62742 - 68140 inc.
1945 68141 - 71340 inc.
1945 72607 - 73107 inc.
1946 71341 - 72606 inc.
1946 73108 - 74916 inc.
1947 74917 - 81509 inc.
1948 81510 - 87378 inc.
1948 0284800001 - 0284800675 inc.
1950 02800676 - 02800680 inc.


http://jetstar.minneapolis-moline.com/MM-Louis_serials.txt

Thanks to everyone's knowledge and research. Knowing the year of the RE engine is very helpful.

Here is a 1939 ZTS for restoration. Notice breather tube and brass tag.

A picture of my 1937 ZTU for reference of the starter casting never knocked out and the trx 12.

Carb close up

(quoted from post at 17:46:04 04/23/17) Still researching what I have with a recently acquired 1937 ZTU. My Parts Manual indicates after engine number 74917 the carburetor was changed from a TRX 12 to a TSX 97. Since my engine serial number is 76722, the TSX 97 it has is in fact the correct carburetor. However what is the correct tube extending up to the air breather? The TRX 12 has a bolt together connection, but the TSX 97 receives a hose. is there a replacement tube for a hose connection? Thanks again for your thoughts.

Click to expand...

Looking forward to some pics of your 1937. What's your serial number? I'm 561941 tractor and 42258 engine.

Great picture. Would you have or a picture of a 1936 Z
They would have to be really rare for the Z model.

(quoted from post at 21:37:11 04/27/17) Great picture. Would you have or a picture of a 1936 Z
They would have to be really rare for the Z model.

Click to expand...

I have never seen a 36 ZTU in person as only 30 some were built. They would have been Grey like a Twin City J but have RE engine. I have a couple pictures I found of one and the RE engine has a different carb, breathers and oil psi gauge set up than the 1937 ZTU.

Those pics look more like an experimental than a production run of 30. That's a J transmission and air cleaner. Engine tag even says Twin
City. Definitely an RE type engine with lots of differences from a production engine. Extra spacer between engine and trans to make J
trans longer. Neat Jensen photos.

(quoted from post at 09:08:22 04/30/17) Those pics look more like an experimental than a production run of 30. That's a J transmission and air cleaner. Engine tag even says Twin
City. Definitely an RE type engine with lots of differences from a production engine. Extra spacer between engine and trans to make J
trans longer. Neat Jensen photos.

Click to expand...

I agree. Having never seen a 1936 I figured the few that were made might have been a modified J.

Great picture, Where would this tractor be and how many are known to exist

The black and whites I posted are from factory photos from the 1930's. I have yet to see a 1936 in person and I have yet to find a lower serial number 1937 than mine.