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Implement Alley Discussion Forum

Do old disk mowers ever die?

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James

01-03-2004 17:16:39




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If I start looking for a used disk mower, what do I look out for? What commonly wears out? How do I check one out?




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Rick

01-04-2004 01:41:33




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 Re: Do old disk mowers ever die? in reply to James, 01-03-2004 17:16:39  
I have a very nice JD 1460 discmow/conditioner for sale if that would help. I am just going to larger unit. O r if you are wanting a large 12ft unit I complete rebuilt one last summer for fellow. I has a complete new bar in it. Rick



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kyhayman

01-03-2004 20:40:36




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 Re: Do old disk mowers ever die? in reply to James, 01-03-2004 17:16:39  
JMS gave you very good advice. 'Turtle shells' should sit at 90 degree angles and the when holding one disc the amount of movement of the adjacent disc will show you the amount of tooth wear. To answer your question "you bet they wear out"! I have never seen one traded in or sold that wasn't. I buy and trade a lot of used equipment but disc mowers I buy new. The bar with the interlocking gears are notorious for when anything breaks it can cause catastrophic damage to lots of other stuff. I absolutely would not buy one of them used (I did once and it was ok, but ..... ..). The shaft style (NI and some BH) is a lot more predictable and serviceable as each unit sits in it's own grease pot.

For my own use I've had JD, BH, and NI. In that order. My dad has used NI since the mid 80's (on his 3rd) and the current production is by far the best. He's had hit since '94. The others were worn out after 5000 acres. This one is over 8000 and still going thought we did remove all the shims last year. New 3 years ago my 5408 NI was $4950. Got $2000 off that trade in for a BH GHM 800. It had about 50% left in the cutter bar but the power transfer box had been rebuilt and (I suspect) it had something warped in the power transfer hub.

My experience is that the gear type bars on the disc mowers get more wear on the outside end (oil flows when lifting bar) so check outboard for wear. Disc conditioners get more uniform wear and last longer. Grease pot bars on mowers seem to fail first on hubs 4 and 5 ?? (I have no theory why).

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JMS/MN

01-03-2004 17:55:50




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 Re: Do old disk mowers ever die? in reply to James, 01-03-2004 17:16:39  
Two basic designs that I know of- power is transmitted to one or two shafts that drive all cutterheads, or power is transmitted from one cutterhead to another. Wiggle the cutterheads back and forth to determine wear. Compare that to a new unit. There is some adjustment via shims, etc. Ones with a common shaft can have a twist in the shaft, and still operate ok if you reset the pinion gear in the cutterhead. Need to open it each season anyway for oil refill. (New Idea). If power goes from one head to another- check wear from first to last. Heads normally sit at 90 degrees to the adjacent one.

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