Draggin Wagon Posted December 18, 2021 Share Posted December 18, 2021 I am in a pinch. My handy dandy Kubota R-400 loader has a bad ring gear in back rear end. Part number for ring gear 68811-2421-0 and Kubota does not show any in America - discontinued part. My next choice is finding a used one BUT it seems these machines are about as hard to find as an honest politician! Hope my picture is attached. If anybody knows where there is one sitting, please holler!! My gear has 3 teeth that have "flaked" out on drive side across the whole length. If I can't locate a used one, then the next choice is to TIG weld these bad places. That opens up a whole new thread of conversation for the next post. Thanks in advance Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/ Share on other sites More sharing options...
Hayseed Posted December 18, 2021 Share Posted December 18, 2021 I've NFI if this is of any help to You.. https://ku-part.com/kubota/gear/6881124210/ Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-485428 Share on other sites More sharing options...
D-Day Posted December 18, 2021 Share Posted December 18, 2021 I found this some time ago but have not had to use their services yet, they say they specialize in reproducing gears of all kinds from reverse engineering and from drawings may be worth a call to see if it is cost effective Circle Gear and Machine, Inc. 1501 so. 55th ct. Cicero, IL 60804-1842 Phone: 231-590-0210 email: circlegear@usa.com Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-485455 Share on other sites More sharing options...
Draggin Wagon Posted December 19, 2021 Author Share Posted December 19, 2021 Thanks Hayseed! I put in a request, we'll see how it turns out. Thanks D-Day! I'll give them a call Monday. I'm going to post picture of damage. I haven't ruled out welding up the 3 teeth with either stick or TIG. Not sure yet what filler rod to use. I'm open to any and all suggestions. This old loader gets "kid glove" treatment. Just wish I had pulled rear out when I first thought there was a problem. Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-485496 Share on other sites More sharing options...
Draggin Wagon Posted December 23, 2021 Author Share Posted December 23, 2021 Jettertrucks, Any way to get part number of ring gear? That unit is a lot newer than mine. Wonder if any chance the ring gears are same? Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-485768 Share on other sites More sharing options...
Popular Post Draggin Wagon Posted February 23, 2022 Author Popular Post Share Posted February 23, 2022 Could not find a new or used ring gear for this handy machine. Next choice, weld and grind in new teeth. Lot of calling and research, wound up using Crown Royal 220 TIG rod. This has properties very similar to Eutectic 680 which is hard to find. The 220 rod flowed in beautiful and the grinding was another subject!! Anyhow, all is back together and have run a little without any explosions. Guess time will tell how well this will work. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-490039 Share on other sites More sharing options...
Chanzoid Posted March 25 Share Posted March 25 (edited) I had a similar problem with my Kubota and ended up finding what I needed through local dealers and farm equipment auctions. Maybe you could try that too? For the gear issue, maybe a shop that fixes machinery could help, or they might make the part you need. If you're thinking about welding, that's a big job and needs a lot of care. I bought my Kubota from Wickham Tractor Co. They know a lot about parts and how to fix things. Maybe they can help you find the part or suggest what to do next. Here’s their website: https://www.wickhamtractor.com/. Edited March 31 by Chanzoid Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548855 Share on other sites More sharing options...
Draggin Wagon Posted March 26 Author Share Posted March 26 ended up welding up teeth and grinding to fit and what a grinding job that was !!!!!!!!!! So far it is holding up, probably bust tomorrow since I said that Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548862 Share on other sites More sharing options...
mowerman Posted March 26 Share Posted March 26 That’s probably what I would’ve attempted myself and yes, it sounds easier than what it probably was… bob Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548883 Share on other sites More sharing options...
mowerman Posted March 26 Share Posted March 26 I did that on a 51 Chevy truck door latch. One time came out pretty good…. Bob Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548884 Share on other sites More sharing options...
Geoff Weeks Posted March 26 Share Posted March 26 At least you had a good portion of the root of the tooth to work with. What did the pinion look like? Most times I have seen damage like that the pinion took the worse of it. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548885 Share on other sites More sharing options...
mowerman Posted March 26 Share Posted March 26 Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548922 Share on other sites More sharing options...
mowerman Posted March 26 Share Posted March 26 well theres my wonder wagon,,,,bought it like 15 years ago,,and got all the parts to fix it,,,like everything else around here get stuff and it sits for fifty years,before i do anything with them.lol....just ordered 4 new tires so i can atleast move it into the shop ...been sitting so long all 4 are dry rotted from going flat and sitting in the dirt......sometimes when i decide alright this thing is been sitting way too long now,time to do something with it,,,,thanks for the inspiration...bob Quote Link to comment https://www.bigmacktrucks.com/topic/68943-kubota-r-400-wheel-loader/#findComment-548923 Share on other sites More sharing options...
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