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Replacing transmission rear shields and bearing
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Replacing transmission rear shields and bearing
We're going to open up a '49 cub next week to replace transmission shaft and front bearing, oil seal. I think we're prepared for that thanks to help from forum. However, my gut tells me that we should replace rear bearing and shields.
Understanding: Rear shield and bearing come out the rear. Front shield comes out front into the trans cavity area.
Questions:
1. Can we hook the rear bearing with a hand tool and pull the bearing and retainer out the rear once the trans shaft is removed?
2. How does the front shield come out, and get replaced? Does the trans cavity have to be cleared out of gears and rods?
3. Installing a new rear bearing from the rear - simply push/press it in with a 2x2 or other suitable object?
4. How is the rear shield installed?
Thanks.
Gene
Understanding: Rear shield and bearing come out the rear. Front shield comes out front into the trans cavity area.
Questions:
1. Can we hook the rear bearing with a hand tool and pull the bearing and retainer out the rear once the trans shaft is removed?
2. How does the front shield come out, and get replaced? Does the trans cavity have to be cleared out of gears and rods?
3. Installing a new rear bearing from the rear - simply push/press it in with a 2x2 or other suitable object?
4. How is the rear shield installed?
Thanks.
Gene
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Re: Replacing transmission rear shields and bearing
I dont think you can remove the bearing without removing the differential....it is in the way.
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Re: Replacing transmission rear shields and bearing
Keep in mind that the rear bearing on a 49 is a larger roller bearing, not the needle bearing pictured in Bill E Bob's how-to.
One of the issues with that bearing is that the shaft itself is the inner bearing race for the rollers. It is induction hardened at the bearing surface. Most of them get a little chewed up so a new bearing may need a new shaft as well.
There is a work-around for this but it involves turning or grinding the shaft to .787" and using a modern sealed bearing as a replacement. My friend was able to remove the stock with a carbide tool on a lathe but it is hardened. The good news is finish is no longer important as it will no longer have a bearing rolling on it.
http://www.farmallcub.com/phpBB2/viewtopic.php?f=1&t=17999&p=130761&hilit=sealed+bearing+transmission#p130761
One of the issues with that bearing is that the shaft itself is the inner bearing race for the rollers. It is induction hardened at the bearing surface. Most of them get a little chewed up so a new bearing may need a new shaft as well.
There is a work-around for this but it involves turning or grinding the shaft to .787" and using a modern sealed bearing as a replacement. My friend was able to remove the stock with a carbide tool on a lathe but it is hardened. The good news is finish is no longer important as it will no longer have a bearing rolling on it.
http://www.farmallcub.com/phpBB2/viewtopic.php?f=1&t=17999&p=130761&hilit=sealed+bearing+transmission#p130761
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Re: Replacing transmission rear shields and bearing
I was able to remove the rear bearing on my 48 Cub without taking out the differential. The below photo was taken after installing new bearing and shield. With the input shaft removed, you can also drive the old bearing out the rear from the front side of the transmission case.
Bill VanHooser
Cub 54 Blade, Cub 193 Moldboard Plow, Cub 28A Disc Harrow
Cub 54 Blade, Cub 193 Moldboard Plow, Cub 28A Disc Harrow
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Re: Replacing transmission rear shields and bearing
I stand corrected.
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Re: Replacing transmission rear shields and bearing
Bob in CT, or others....
I've been reading posts dealing with converting to the SKF 6004 bearing for the rear. Question regarding the bearing and shields for the old type. Using the 6004 sealed bearing are old shields needed - or would they even work?
Follow-up question, simply have the shaft turned to 0.787, install the 6004 bearing and nothing else needed for the rear shaft/bearing?
I've been reading posts dealing with converting to the SKF 6004 bearing for the rear. Question regarding the bearing and shields for the old type. Using the 6004 sealed bearing are old shields needed - or would they even work?
Follow-up question, simply have the shaft turned to 0.787, install the 6004 bearing and nothing else needed for the rear shaft/bearing?
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Re: Replacing transmission rear shields and bearing
Pretty straightforward. With the sealed bearing, you don't rely on the transmission lube for the bearing anymore.
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Re: Replacing transmission rear shields and bearing
Thought so; but sometimes my thoughts get fogged up.
Thanks.
Thanks.
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Re: Replacing transmission rear shields and bearing
I need to do the same bearing replacement. Do you have a link for the correct bearing? I found SKS 6004 RS. Would that be the right one? There were no dementions shown for it.
Pete from Virginia Beach
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Re: Replacing transmission rear shields and bearing
From what I understand, the bearing is SKF 6004 2RSJEM (NAPA lists as 6004-2RSJ). Same bearing on e-bay, at McMaster Carr and NAPA. Dimensions:
42mm OD
20 mm ID
12 mm thick
Pete, the link provided above by Bob in CT has some excellent info and should answer.
Gene
42mm OD
20 mm ID
12 mm thick
Pete, the link provided above by Bob in CT has some excellent info and should answer.
Gene
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Re: Replacing transmission rear shields and bearing
http://www.mcmaster.com/#6004-ball-bearings/=liddgr
I used the double sealed bearing. Watch out for Chinese stuff. SKF is a good choice.
I used the double sealed bearing. Watch out for Chinese stuff. SKF is a good choice.
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Re: Replacing transmission rear shields and bearing
I was looking through the How To section of the forum and thought that may be there should be more in it, based on posts like this one were some one has done an up grade and provided all the information to complete the up grade. This post was helpfull to me and it is just my thought.
Pete from Virginia Beach
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Re: Replacing transmission rear shields and bearing
Fun day yesterday in Hickory working with my son in splitting his Cub and solving some transmission/pto issues.
The trans front seal retainer WAS installed backwards. Replaced worn seal and installed correctly.
R/1st slider gear was chipped about 1/3 in on one spline. Replaced it.
Suprisingly, the trans input shaft was in fine shape. Rear bearing appeared okay.
Buttoned her up and gave her a test drive. Rear noise gone and pto worked fine.
Prep for question:
Prior to split/repair, the trans was flushed and filled with 85-140 gear oil.
Final drives were topped off.
Test run after the fuid change/addition, but noise was still there.
Noise gone after split and changes as noted above.
Question: Ideas as to probable cause of noise?
Thanks to everyone for all your guidance.
Gene
The trans front seal retainer WAS installed backwards. Replaced worn seal and installed correctly.
R/1st slider gear was chipped about 1/3 in on one spline. Replaced it.
Suprisingly, the trans input shaft was in fine shape. Rear bearing appeared okay.
Buttoned her up and gave her a test drive. Rear noise gone and pto worked fine.
Prep for question:
Prior to split/repair, the trans was flushed and filled with 85-140 gear oil.
Final drives were topped off.
Test run after the fuid change/addition, but noise was still there.
Noise gone after split and changes as noted above.
Question: Ideas as to probable cause of noise?
Thanks to everyone for all your guidance.
Gene
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Re: Replacing transmission rear shields and bearing
equeen wrote:Fun day yesterday in Hickory working with my son in splitting his Cub and solving some transmission/pto issues.
Question: Ideas as to probable cause of noise?Gene
Gene,
Hard to say what may have been the source of the noise. I would think the chipped gear could have benn the culprit, but did you have noise in all gears or just 1st and reverse? Did you replace the front bearing on the input shaft? Did you have noise when driving on level ground or just going up an incline?
Bill VanHooser
Cub 54 Blade, Cub 193 Moldboard Plow, Cub 28A Disc Harrow
Cub 54 Blade, Cub 193 Moldboard Plow, Cub 28A Disc Harrow
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