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John Deere Tractors Discussion Forum
Show Parts for Model:

830 transmission parts

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04-26-2005 10:17:18

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I posted a while back about a dofferential. I found an 820 transmission back behind the barn and pulled the ring gear out so I got that but does anybody know where I can get the gear that drives the ring gear. It is about center the shaft right infront of the differential. Mine has alot of slop. John Deere doesn't offer it and I can't find a place locally that has anything. WOuld like to find new or good used. Thanks.

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04-27-2005 08:29:44

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 Re: 830 transmission parts in reply to chrisfromsolitude, 04-26-2005 10:17:18  
You are going to have to pay the very modest fee for the JD parts and service manual. That way you will be ordering the proper gear. And you will know what clearances and torque values to use. That shaft AR 1177R is likely worn on the splines for both the 20 tooth pinion drive gear R1492R and the 3/6 gear if that one was used the most. The part numbers from an "R" R 85 R which subs to AR893R along with R 79R are similar. I would like to see the "R" and 80/820/830/840 gears/shafts side by side and measure them. I have an AR 1177R laying on the shed floor that we pulled out of the 80. It would need the splines built up in two gear locations before it could be re-used. The inside splines of those 3/6 and diff drive gears gears are pretty well ratted out as well. Just depending on how much noise you can tolerate. Who knows how long the old shaft/gears will work before something shears off? Maybe 20 more years. The trans lube back in those days particually when mixed with 10,20,30, 40 even 45+ years of dirt and condensated water/rain water. The lube didn't always keep an oil film between moving parts.

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04-27-2005 10:10:44

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 Re: 830 transmission parts in reply to buickanddeere, 04-27-2005 08:29:44  
I have a parts manual and a service manual but I forgot to look in it before I left the shop. It is a 20 tooth gear though. It moves alot and I just thought I'd fix it since I have the whole back end of the tractor off. Thanks for the info. I'll have to get that shaft out and see if it is worn too.

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04-27-2005 02:44:06

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 Re: 830 transmission parts in reply to chrisfromsolitude, 04-26-2005 10:17:18  
Here is a picture of my 80's tranmission. Is the arrow pointing to the gear you need?

That is the R1492R Differential Drive pinion. As you can see, mine is also pretty chewed up. I managed to find a replacement (though I haven't swapped it out yet-BIG job). I had pretty good luck finding this gear through this website's Classified section. You should try it. You'll most likely only find good used. I doubt there are any new gears on the planet.

By the way, I've heard that this gear usually gets most of the wear. Has anyone else experienced this?

My Industrial John Deere website
John Deere Diesels
The LaGrange Engine Club

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04-27-2005 10:08:12

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 Re: 830 transmission parts in reply to WeirdDeere, 04-27-2005 02:44:06  
I have found another tracnsmission and both that gear and the gear in my tractor are worn very badly. I would say that they do get most of the wear. All of the power is transmitted through that. I'll try and find one on the classifieds. Thanks

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Glen in TX

04-26-2005 11:28:26

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 Re: 830 transmission parts in reply to chrisfromsolitude, 04-26-2005 10:17:18  
Go to and go to parts and then states to find salvage yards that may have what you need.

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