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Implement Alley Discussion Forum

Re: JD KBA-7-10 Disk

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David8686

05-03-2013 15:34:01
70.226.172.80



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JD Seller you asked "So what diameter are your blades???" Good question; you may have identified the problem. The rear blades are 17" and the front blades are 15". I believe the original equipment blades were 20" and 18" respectively, so the blades are worn 3" smaller than the original ones. Replacing the blades may cost me more than the $600 I paid for the disk. I'll check into that. Thank you for your help.

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Leroy

05-04-2013 05:32:41
69.88.205.38



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 Re: JD KBA-7-10 Disk in reply to David8686, 05-03-2013 15:34:01  
And that disk 16" was normal with 18" on some and common to be worn down less than 15" but the 16" will not do as good a work as the 18" but were sold by price as they were cheaper and at one time it was though that 16" blades cut better and pulled easier than the 18" but that is opposite of fact. Now I do not know if there would be frame clearance for a 20" blade and they are thicker so you might have a problem getting them in because the bearing spacing is fixed and then total axle length might be a problem as well. Orignal blades were probably 11 guage, current replacement 9 guage and 20" would be 7 guage. The thicker the blade the more weight it needs to cut.

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B-maniac

05-03-2013 18:49:20
97.85.59.154



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 Re: JD KBA-7-10 Disk in reply to David8686, 05-03-2013 15:34:01  
I have run pull type discs with 11-12" disc dia with no problem with sliding. That being said , though , if you are running weighted and in light loam/sand up to the axle shafts it might slide,BUT all of them would do it not just one gang. Check that gang against the others as far as spacers and cones on either side of the bearings and if it has them and if they are installed the right way. ALSO, straighten out the angles of the gangs and does that one still slide?. Might be missing or broken spacer/cone letting gang slide endwise when angled and under longitudinal thrust.

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