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brush chopper slippage

D

Dellbertt

Member
I have a case 66T 5ft brush chopper (which the case IH dealer swore there was no such thing until I brought in the original manual) that I pull behind a 300U. In tough grass the blade will stop but the engine will not bog down.
I raise it and it winds up again.

I assume its the pto adjustment slipping because I think the chopper gear is not clutched-I believe.(I could look at the chopper manual again but Im already in my computer recliner chair and the manual is waaaaaaaay over there:) Ive tried over the years to adjust the pto clutch by the manual but i never have been able to get it right.

Any 300U pto adjustment wizards out there?
 
Assuming it has the band type IPTO,and the lever is not bent or linkage out of spec.
There is a mark on the lever base (manual)
that is midway from locked on, to locked off with the button on the handle.
In this position, adjust the bands (seperately) (under the little peanut shaped cover on the top)
until each is tight enough to prevent rotating the shaft by hand. Then loosten each about one half turn. This will (should) make it free to turn by hand. It should also make it drive, and brake correctly. Make sure you click the lever latch in either position. Running it W/O latching will cause slipping. Linkage slipping, and bent rods are also issues to wach for. Good luck. JimN
 
Your suggestion is different than manual.
Printed it out and try it this afternoon.
Will let you know.
Thanks.
 
If your chopper is clutched with a disc type clutch, I have good luck if I clean the disc out. They get dust in them and the dust acts like ball bearings. I losened up the clutch adjustment till it slips just a tiny bit. Start it up and while it is on the ground running at idle(and please BE CAREFUL!)pour water (or squirt in brake cleaner) down in between the friction material and plate. Stand to the side when the stuff slings out! let it slip some more to heat it up to get the water or cleaner dried out and shut her down, then tighten up the adjustment. I did this on an old Ford bushog and it worked slick as a whistle. Some guys will drill a hole through the plates and put in a couple brass bolts if the friction material is gone.
 
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