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2072 Driveline question

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Oak

Well-known member
Joined
Oct 26, 2019
Messages
118
Location
Georgia
Okay, this is the 2072 I was working on last winter and I'm trying to find time to work on it but I never have time anymore.

I pulled the rear, did the drain holes and added rear braces. I bolted everything back up and all is good.

I pulled the motor to replace the front & rear oil seals, cleaned everything up, glued one magnet back on the flywheel and replaced the bearings in the front PTO.

I then replaced the fan, all of the ball bushings and rag joints on the driveshaft. Then I placed the shaft in the tractor and bolted the rear coupler to the input shaft.

I reused the drive shaft, the flange assembly that bolts to the motor, both shaft couplers on the shaft and the splined coupler for the pump.

Next I got the engine back in the frame and slid it back to the driveshaft

Here's where the trouble starts....

The motor plate will not bolt to the frame because the holes won't align up. The black circle is the hole in the frame for the bolt.
IMG_3389 - Copy.jpg

I shoved everything back as far as it will go but it won't go anymore.

I ran into this issue when I did my 882 and I had to make a new driveshaft. That is a problem for me because it will require a lathe for a SGT driveshaft since the shaft is 3/4" but turned down to 5/8 on the ends for the ball bushings.

I tossed the old rags in the trash months ago so I'm not sure how thick they were. I purchased these rag joints years ago from my Local Cub Cadet dealer so they are OEM. Here are the new rags and the measure 0.75" when bolted in. I'm pretty sure the new rags are thicker than the original and this is my issue.
IMG_3392.jpg

How important is this pin in the rear splined coupler? If I remove it and shove the coupler back 1/4" everything lines up and the motor plate can bolt up. I don't see a reason for the pin but I'm pretty sure Cub didn't put it there for nothing.
IMG_3390.jpg
Being that the rags are thicker, I'm thinking that the 5/8 part of my driveshaft is not going into the ball bushings as far as they should. Thoughts?
 
Last edited:

mgonitzke

Well-known member
Joined
Aug 4, 2006
Messages
4,325
Location
Wichita, KS
displayname
Matt Gonitzke
Without that pin, the coupling will be able to slide on the input shaft as the frame flexes, which will wear the coupling and input shaft.
 
Joined
Jun 22, 2022
Messages
13
Location
Michigan
Okay, this is the 2072 I was working on last winter and I'm trying to find time to work on it but I never have time anymore.

I pulled the rear, did the drain holes and added rear braces. I bolted everything back up and all is good.

I pulled the motor to replace the front & rear oil seals, cleaned everything up, glued one magnet back on the flywheel and replaced the bearings in the front PTO.

I then replaced the fan, all of the ball bushings and rag joints on the driveshaft. Then I placed the shaft in the tractor and bolted the rear coupler to the input shaft.

I reused the drive shaft, the flange assembly that bolts to the motor, both shaft couplers on the shaft and the splined coupler for the pump.

Next I got the engine back in the frame and slid it back to the driveshaft

Here's where the trouble starts....

The motor plate will not bolt to the frame because the holes won't align up. The black circle is the hole in the frame for the bolt.
View attachment 150368

I shoved everything back as far as it will go but it won't go anymore.

I ran into this issue when I did my 882 and I had to make a new driveshaft. That is a problem for me because it will require a lathe for a SGT driveshaft since the shaft is 3/4" but turned down to 5/8 on the ends for the ball bushings.

I tossed the old rags in the trash months ago so I'm not sure how thick they were. I purchased these rag joints years ago from my Local Cub Cadet dealer so they are OEM. Here are the new rags and the measure 0.75" when bolted in. I'm pretty sure the new rags are thicker than the original and this is my issue.
View attachment 150369

How important is this pin in the rear splined coupler? If I remove it and shove the coupler back 1/4" everything lines up and the motor plate can bolt up. I don't see a reason for the pin but I'm pretty sure Cub didn't put it there for nothing.
View attachment 150370
Being that the rags are thicker, I'm thinking that the 5/8 part of my driveshaft is not going into the ball bushings as far as they should. Thoughts?
Hello, May I ask what are the drain holes and what did you do to them? I have an 1872 with the engine out that I am going to be putting rear braces on. I have new ball bushings my rags are good. Thanks
 

Oak

Well-known member
Joined
Oct 26, 2019
Messages
118
Location
Georgia
Ray, the drain holes are drilled in the transmission case with the axle tubes removed. Oil that collects in the bottom part of the axle tube has now way of draining back into the sump and traps contaminants. I didn't take any pics but I will see if I can find some.

On the OP, I ended up welding the motor plate holes shut and re-drilled them.
 

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