JD 70 Cam Gear Removal?

Sorno · Dec 28, 2017

I have a cam gear on a JD 70 that has a whole bunch of broken teeth. I have the tractor all ripped down to where the cam is loose from side to side. How do i get the cam bearing off the end of the cam so i can get the gear off?

Is there some kind of special bearing puller that will remove the bearing thru the case?

I do not want to have to remove or will i remove the crank to get the cam gear off.

I will take some picture tonight so show where i am at in the process.

MSD · Dec 28, 2017

Try a thin chisel and see if it will move. You might need to add some heat to it also. To get the cam out I believe you need to pull the crank on the 70's but you will still need to remove the gear first.

Mike M · Dec 28, 2017

I have removed A and 60 cam brgs. from the left side with a K-D power steering/alt. brg. puller for autos. You have to cut the cage off and remove the rollers. This K-D puller has 2 half sleeves and are the right size to fit over the lip on the cam brg. and pull them. Not sure if a 70 is the same size brg.
Have you figured out why the teeth got busted off ? This would be of concern so as not to happen again.

Sorno · Dec 28, 2017

I was hoping to remove the bearing without destroying it. ouch.
I will look into that puller.

The teeth are missing because the governor shaft broke while the tractor was running.

(quoted from post at 22:27:12 12/28/17) I have removed A and 60 cam brgs. from the left side with a K-D power steering/alt. brg. puller for autos. You have to cut the cage off and remove the rollers. This K-D puller has 2 half sleeves and are the right size to fit over the lip on the cam brg. and pull them. Not sure if a 70 is the same size brg.
Have you figured out why the teeth got busted off ? This would be of concern so as not to happen again.

susandiane · Dec 28, 2017

The IT manual sez you can lower the crank to make room to remove the gear. Needless to say it says a bunch of other stuff that has to be moved/removed. I'd sure read over the procedure from at least the IT
if not the JD service manual as it sounds like a bear. Not at all like the lettered or other numbered engines. Good luck and a happy new year to you, I hope!

Mike M · Dec 29, 2017

OUCH ! Those are all strange failures. Wonder why the gov. shaft broke ? I've seen a lot of torn up gov. bevel gears and bearings but the shafts are usually fine ?
Does your tractor also have power steering ? if so wonder if something is causing an extra load up there ?

Sorno · Dec 29, 2017

Alright here are the images i took this morning showing the bearing that needs to come off.

[URL=http://s232.photobucket.com/user/SORNO/media/IMG_4065.jpg.html]

[URL=http://s232.photobucket.com/user/SORNO/media/IMG_4066.jpg.html]

As you can see there is not a lot of room to work but someone must have removed one of these before. People that part out tractors?

I do have an IT manual and a parts manual but it just tells you to remove the bearing now how or with what. Some times that IT manual is pretty vague on what to do.

Sorno · Dec 29, 2017

(quoted from post at 15:27:48 12/29/17) Alright here are the images i took this morning showing the bearing that needs to come off.

As you can see there is not a lot of room to work but someone must have removed one of these before. People that part out tractors?

I do have an IT manual and a parts manual but it just tells you to remove the bearing now how or with what. Some times that IT manual is pretty vague on what to do.

/url]http://i232.photobucket.com/albums/ee8/SORNO/IMG_4066.jpg

Sorno · Dec 29, 2017

OK i am obviously not smart enough how to post pictures on this site.

I am not sure they the governor shaft broke either. The tractor was sitting idling when it happened. I was just walked from one shed back to the tractor heard a slight clunk and the tractor shut off like you turned off the switch.

Sorno · Dec 29, 2017

(quoted from post at 15:33:28 12/29/17) OK i am obviously not smart enough how to post pictures on this site.

I am not sure they the governor shaft broke either. The tractor was sitting idling when it happened. I was just walked from one shed back to the tractor heard a slight clunk and the tractor shut off like you turned off the switch.

Mike M · Dec 29, 2017

Lets try this link to one that is like what I used.
Untitled URL Link

buickanddeere · Dec 29, 2017

(quoted from post at 18:57:06 12/28/17) The IT manual sez you can lower the crank to make room to remove the gear. Needless to say it says a bunch of other stuff that has to be moved/removed. I'd sure read over the procedure from at least the IT
if not the JD service manual as it sounds like a bear. Not at all like the lettered or other numbered engines. Good luck and a happy new year to you, I hope!

Forget the IT manual. What does the real JD manual state that has to be done ?

Sorno · Dec 29, 2017

(quoted from post at 16:23:17 12/29/17)

(quoted from post at 18:57:06 12/28/17) The IT manual sez you can lower the crank to make room to remove the gear. Needless to say it says a bunch of other stuff that has to be moved/removed. I'd sure read over the procedure from at least the IT
if not the JD service manual as it sounds like a bear. Not at all like the lettered or other numbered engines. Good luck and a happy new year to you, I hope!

Click to expand...

Forget the IT manual. What does the real JD manual state that has to be done ?

I do not have one. But if you do and you are willing to share that would be great.

DONMYEIL · Dec 29, 2017

I wouldn't worry about saving that bearing because of the rust and probably pitted . Remove the reduction cover and that should let the cam move to the side enough to let you turn and remove it . I haven't done one in 40 years. the bearing will come off when you press the gear .

Sorno · Jan 8, 2018

Well i got the Cam bearing off. My neighbor had an interesting set of pullers that we got it moving with and once it was moving it came off fairly easy.

HOWEVER.....

I still can't move the cam over far enough to the clutch side of the tractor to get the dang gear off.

When i put my hand up into the case i can feel a finger width of space between the cam lobe and some cast piece i can not see however i can not get the cam over to touch that cast piece. If i could move it over just that much further I am sure i could get the gear off the cam shaft.

I was so frustrated last night i almost put the wheel back on and rolled the thing outside.

JD 70 Cam Gear Removal?

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