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John Deere Tractors Discussion Forum

DISK, education?

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05-11-2020 16:19:13

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Good day, happy to be here, been awhile. I have a 47 B fresh bore 90 over, 29 HP. on dyno. I need a disk, wanted to ask if a 8ft. should work? Need to know, differences in the John Deere KBA 8ft. VS the John Deere RWA 8ft. OR what do most folks recommend, as I am out of work, a fair value disk is what I am trying to look for. Thanks for any and all input; Bob63

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05-13-2020 14:27:45

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 Re: DISK, education? in reply to Bob63, 05-11-2020 16:19:13  
I either have a 10' or 12' RWA disc. I'll have to go back and remeasure it, not sure at the moment. I like its construction, however mine does ridge also. In the full down position it is a load for my 1950 G. I would rather have an 8' model. I have never used a KBA, but it's construction looks a little hokey to me. The gangs are held on by chains at the end of the lift tube. Maybe this gives it a little more floating capability and adjustability, but I don't know. A little story about my RWA. When I bought it the previous owner loaded it on my trailer sideways with his excavator. I had two foot or more of tongue hanging off one side and another foot or more of disc hanging off the back. Pretty nervous haul going home. It wasn't until I got home that I noticed the pin to remove the tongue for trailer transport. When I looked at the disc I never saw that pin and the previous owner never said anything about it either. I don't know why I couldn't see it earlier, but it would have made for a much safer hall home. Oh, one more thing. I clipped the corner of the guys barn with the disc when I went to leave. I did stop and point it out to him, but I still feel bad about it to this day.

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05-13-2020 07:28:40

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 Re: DISK, education? in reply to Bob63, 05-11-2020 16:19:13  
I run only John Deere Eqimpment on my farm. That being said I think that the KBA disc is the worst disc John Deere ever made. I have used one for 3 years 400 acres or so. The main problem is it really hills up the dirt. Also the frame is poorly designed, so it has a tendency to brake. I worked on an RWA once, that looks like a really good disc. Iím looking for one now.

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Tx Jim

05-12-2020 04:54:33

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 Re: DISK, education? in reply to Bob63, 05-11-2020 16:19:13  
Another older JD disk model you could consider is AW if you can locate one that is small enough for your tractor.

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05-12-2020 04:35:28

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 Re: DISK, education? in reply to Bob63, 05-11-2020 16:19:13  
Thanks, I will focus on KBA, I am in south central Pa. Having a rollback service ready, is another part of the puzzle.

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Tx Jim

05-12-2020 04:21:02

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 Re: DISK, education? in reply to Bob63, 05-11-2020 16:19:13  

Welcome to YT

I never liked a JD RWA disk harrow. Due to the fact that the disk gang angles can't be adjusted the RWA has a history for ridging the soil. A KBA is a nice light duty disk harrow. My JD BO pulls my 6' KBA very well so I think your '47 B should handle a 8' light duty disk harrow just fine.
Location of implement has a large bearing on implement value but I gave $300 for my pull type KBA.

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05-11-2020 18:55:41

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 Re: DISK, education? in reply to Bob63, 05-11-2020 16:19:13  
RWA a good disk. Normally I would caution against pulling a disk too deep or too fast. Will not be an issue with the B.

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