Brush Hogging

Docgj · May 20, 2009

I have a TO 30. Just purchased a 60 inch brush hog to keep my wifes horse pasture knocked down. Used it for the first time yesterday. Is it normal when trying to stop that the force of the blades spinning move the tractor ahead about a tractor length? After I got used to the feeling of not being able to stop when I wanted to...it wasn't to bad. I'm glad I wasn't headed toward the creek bank the first time.
docgj

Jeff-oh · May 20, 2009

Yes, it is normal for this to operate this way. No you should not let it operate this way.

The PTO is directly powered by the drive line. Thus when you press the clutch and remove the engine power, the momentum of the mower blades then become the power source to drive the wheels.

There is an easy and one of thoes "MUST" have safety devices called an "Over-riding Clutch" or OCR for short.

This devise, pictures, slips on the PTO directly then you hook up the mower PTO shaft to it. The device will only transmit power one way and when you press the tractor clutch the OCR will harmlessly click away as the mower spins down...

No more getting pushed forward.

They Run ~$70.00 and are available at TSC and most any farm supply store or tractor dealer.

Jeff-oh · May 20, 2009

I should have said they are ORC's not OCR'c...

Anyhow, you should also verify the PTO diameter you have. Modern standard is 1 3/8's Ferguson used 1 1/8. If your tractor has not been upgraded to a 1 3/8" diameter PTO and you are using an adaptor. You can get a 1 1/8 input with a 1 3/8 output.

Here are two more pictures. One shows how the ORC works the other shows it installed on the tractor and with an implement hooked up.

Docgj · May 20, 2009

Jeff,
Thanks for the quick reply and information.
The brush hog has a clutch at the gear box. I assume that is only to protect the bush hog"s gear box. You are correct that it's very dangerous to operate the tractor this way.
docgj

Jeff-oh · May 20, 2009

Glad to help.

These are easy to find. Only Issue I had is it made my PTO shaft too long and I could bind it up in a rut. I solved by cutting off 1" off both sides of the PTO shaft where it splits in the middle.

Bob (Aust) · May 20, 2009

Doc. [i:01522c0a0c]"The brush hog has a clutch at the gear box."[/i:01522c0a0c] that serves a totally different purpose. It is designed to slip only if you jam up the blades, rather than transmitting the shock back to the tractor transmission and engine.

ORCs are an essential safety feature. Install the ORC, take it slowly and you'll get the hang of it.

I find it useful to set the lift lever up stop, to limit the lifted height of the bush hog, as I feel at maximum height damage may occur to the PTO shaft universals. Never had one break, just being cautious......

Bob in Oz

Brush Hogging

Docgj

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Jeff-oh

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Jeff-oh

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Docgj

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Jeff-oh

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Bob (Aust)

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