Splitting a Cub for transmission overhaul.

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Willy
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Splitting a Cub for transmission overhaul.

Postby Willy » Wed May 09, 2018 7:37 am

Can a Cub be split at the front edge of the transmission instead of at the rear of the engine?

I've got a weird rattling noise that worse in 1st gear although mostly absent in 2nd and 3rd and I don't hear it at all in reverse. Given my lack of a hoist, I was thinking to make a stand to support the front and split it at the front of the transmission would be doable in my shop.
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Re: Splitting a Cub for transmission overhaul.

Postby Shane N. » Wed May 09, 2018 7:43 am

You can do that, be sure and wedge the front axle!
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Re: Splitting a Cub for transmission overhaul.

Postby Dale Finch » Wed May 09, 2018 7:51 am

Last edited by Dale Finch on Wed May 09, 2018 7:59 am, edited 1 time in total.

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Re: Splitting a Cub for transmission overhaul.

Postby Urbish » Wed May 09, 2018 7:56 am

I was able to easily do what you are suggesting with only a floor jack and some homemade screwed and glued plywood splitting stands. See the first post in this thread: http://farmallcub.com/phpBB2/viewtopic.php?f=1&t=89914
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Re: Splitting a Cub for transmission overhaul.

Postby MiCarl » Wed May 09, 2018 8:38 am

If you drain the transmission and pull the cover you can inspect it pretty well before you split. Might give you an idea what parts you might need. I did that with my 48 to determine a rattle in all forward gears was caused by something I can afford to ignore.
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Re: Splitting a Cub for transmission overhaul.

Postby inairam » Wed May 09, 2018 8:50 am

I do not have a hoist and I use motorcycle lifts. They sell them at harbor freight and I have picked them up on craigslist and other places $50-100. I think it is a better option than a stand.
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Re: Splitting a Cub for transmission overhaul.

Postby Urbish » Wed May 09, 2018 9:53 am

inairam wrote:I do not have a hoist and I use motorcycle lifts. They sell them at harbor freight and I have picked them up on craigslist and other places $50-100. I think it is a better option than a stand.


A motorcycle lift is certainly a good option. You can easily make fine height adjustments and roll the front chassis around a little. I like stands as the tractor can't fall off of them. Some folks bolt a trailer jack to the clutch housing with a caster on the bottom for the best of both worlds. Whatever you do, be safe!
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Re: Splitting a Cub for transmission overhaul.

Postby inairam » Wed May 09, 2018 11:49 am

I align them on the center axis of the cub not perpendicular as you with a motorcycle. So the two support rails on the lift are on either side of the center line and the bell housing in resting between. no torque on the lift.

The stand is usually on one side of center and there is torture.

I fell as if it is safer but I have not used a stand so I do not really know.
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Re: Splitting a Cub for transmission overhaul.

Postby Matt Kirsch » Wed May 09, 2018 11:58 am

The hard part is poking the transmission input shaft back through the clutch plate when you slide it back together.

Speaking from experience, DO NOT TOUCH THE CLUTCH PEDAL. Man was that ever a boo-boo... Clutch disk dropped out of place, I didn't realize it, damaged the clutch plate putting it back together... The clutch promptly exploded 3 minutes into the first job I had for it.

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Re: Splitting a Cub for transmission overhaul.

Postby pickerandsinger » Wed May 09, 2018 5:58 pm

I had a "wowed" transmission shaft and split the tractor at the bell housing and put some , I think 1/2 by 14 inch bolts to replace the bolts holding the rear of the trumpet to the transmission and slid the trumpet forward enough to gain access to the transmission shaft bearing cover and bearing..I was able with the transmission top cover off to remove the necessary gears, shifting yokes etc and reassemble ...I have two screw type trailer raising jacks (with wheels) bolted to a plate that fits the implement pads....In this case it was mounted to the transmission if I recall correctly...I would recommend taking the TC off due to its weight although I didn't...I didn't need to do anything with the gears but could have with the possible exception of the bearing that the PTO slides into, in the rear of the transmission... I didn't need to, so I didn't try...I put a Jack and blocked the rear to keep it from doing a porpose maneuver should something go amiss...It was a trial and error thing however I would do it again...With out the TC....Do I recommend it , no its not in the manual...Did I do it yes , but with a great deal of safety precautions, cause I didn't know anyone who had done it...But your problem might be solved just by looking in the transmission top cover... I had the front of the tractor in the gantry btw and of course it was a little more complicated than it sounds...Floor Pan, Clutch linkage etc.....Above all be safe ...Dave :tractor:
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Re: Splitting a Cub for transmission overhaul.

Postby 1541 » Fri May 11, 2018 11:33 am

We split Mike Jones cub at the transmission last September to replace a 1st Reverse slider gear that had lost a tooth. We also replaced a broken shift fork while. We were at it.

And yes, take Kevin’s advice and tie off the clutch peddle to keep someone from depressing it and having the clutch drop out of place.

Doug

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Willy
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Re: Splitting a Cub for transmission overhaul.

Postby Willy » Fri May 11, 2018 12:02 pm

Thanks for the pics! This is looking more doable without a hoist. I got the floor jack and block of wood covered and I can make a set of stands to support the front half. And I've still got the set of wedges I made when swapping the rear wheels around to increase the track.
Waking up the ol' Cub

Nah, it's not leaking oil. It's just marking it's territory.

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Shane N.
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Sold Cubs..
1947 Cub #1447 (Arnold)
1949 Cub (Walt)
1950 Cub (piece of junk)
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Re: Splitting a Cub for transmission overhaul.

Postby Shane N. » Fri May 11, 2018 12:10 pm

Willy, if you'll notice they have a dolly on the back with blocks supporting the rear. A Cub split like that will be very easy to tip over backwards.
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Re: Splitting a Cub for transmission overhaul.

Postby Jim Becker » Fri May 11, 2018 12:54 pm

Shane Nelson wrote:Willy, if you'll notice they have a dolly on the back with blocks supporting the rear. A Cub split like that will be very easy to tip over backwards.

That is worth saying twice. The rear section will be very close to balancing on the rear wheels. Block under both the drawbar and the platform.

I usually have pretty good luck blocking the front in place and rolling the back when decoupling/coupling. It is easier if you have 2 people, one can push on the top of each wheel. I have done it alone.

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Re: Splitting a Cub for transmission overhaul.

Postby Willy » Sat May 12, 2018 9:58 am

Thanks for the advice on it's being easy to tip backwards. I had wondered about that. I had thought about letting it tip a few degrees onto a floor jack to make it easier to control and then leveling it back out for re-assembly. I'm also thinking about the mention of the 14" long 1/2" bolts above. If I can find some of those bolts.

I pulled the top cover off the transmission yesterday afternoon and in the upper pockets of the transmission casing, there was some metallic looking grit and tiny flakes. Then something came up where I needed the Cub badly, so I put the cover back on it and did the job. Funny thing is that the gear noise wasn't near as noticeable as it's been being.

I think I'm going to drain the transmission again into some cheese cloth this time to see what's actually floating around in the oil and go from there. First, I have to go find some 90wt GL1 though. These past couple of oil changes have been with some 85-140 GL5 as it was what I have on hand and I was figuring on not leaving it in there long. Just enough to "flush" around in there. This last batch in there had about a pint of Marvel Mystery Oil mixed in to help with the flush. Which might be why I'm seeing the "flakes" now.
Waking up the ol' Cub

Nah, it's not leaking oil. It's just marking it's territory.


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