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 07-26-2004, 10:01 Post: 91926
plots1

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 running bush cutter

I was at property this weekend mowing clover, running my KK 5 ft through clover was fine, then hitting a few inch and half sapplins along edge I was bustin pins like never before. the cutter is light duty rated for max of 40 hp and the 5205 is pumping out 48hp pto. would that cause the breakage? Use to mall bigger sapplins with the 790 with out so many pin snaps????? Also pins breakin are surely helping save the gear box, would it be Ideal to run under pto speed so as to keep cutter more in it's hp range?






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 07-26-2004, 10:51 Post: 91935
jdcman



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 running bush cutter

years ago i changed my brush whacker from shear pin to a clutch version.

i have a jd 4400 and just engaging the pto at anywhere near 1000 rpm would cause the shear pin to go. the problem appeared to be that there was enough difference between the diameter of the hole and the pin that the pin would tend to get slapped pretty hard against the housing and snap. i also just got tired of having to repair the damn thing out in the field when ever i'd hit a clump of brush or saplings.

the clutch drive solved all my problems. just be sure to inspect it to verify that it isn't frozen up after it's sat for a long period of time, i.e., beginning of every work season.






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 07-26-2004, 11:18 Post: 91937
shortmagnum

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 running bush cutter

I have also sheared quite a few pins on my 5' KK. One inch is in most cases the limit as the instructions say. I've been able to maul up to 2" trees if they are juicy spring popple trees but not regularly. I'm buying 1/2" bolts by the pound now.

A PTO clutch would sure be nice.
Dave






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 07-26-2004, 11:18 Post: 91938
plots1

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 running bush cutter

there is no slop in hole pin fits tight, was still wandering if running a bit under pto speed would help the cutter from tearing up gearbox. was thinking it would keep it more in it's hp rating. seem strange that it was doind that. I might of been tearing up the pto clutchs in the 790 instead of breakin pins, now it will snap them on smaller saplins. I need a larger cutter anyway so it will cover my tracks, just can't swing it yet. i did treat the 790 like it was a bigger machine then it was and was probley tearing it up. thatis why I upgraded.






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 07-26-2004, 12:12 Post: 91944
shortmagnum

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 running bush cutter

"was still wandering if running a bit under pto speed would help the cutter from tearing up gearbox."

I usually run at about 450 rpm at the PTO, especially in the tougher brush. I don't seem to need the extra power at 540 rpm and everything seems to run smoother.
Dave






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Implements Forum

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jdcman 1 | plots1 2 | shortmagnum 2 |




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