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Over run clutch

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Allan S

09-11-2006 21:46:40

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Fitted an over run clutch to my TED20 PTO. It makes clunking noises on starting to rotate. I have been told the ORC should be fitted to the implement end, not the tractor end. Any comments as changing will make the ORC rotate opposite direction.
Good forum, learnt a lot, especially from John - UK.
Regards,
Allan

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Allan S

09-12-2006 14:51:07

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Re: Over run clutch in reply to Allan S, 09-11-2006 21:46:40

Gentlemen, thank you but I am concerned, Bareco in Australia advertize their ORC as "designed for fitting to implement end". P/N A300003. I have spoken to Bareco and I am told it is to ensure a coupling guard covers the ORC when mounted on the implement.
Could it be that it has been designed for rotational direction mounted this way. Any further ideas.
Regards,
Allan

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Jeff-oh

09-13-2006 05:47:05

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Re: Over run clutch in reply to Allan S, 09-12-2006 14:51:07

If they designed it for the implement end then that is where it shouuld go. (This is opsite of all the ones I have seen. But there is nothing that says it cannot be done this way.)

BTW you can test this by hand. Install it on your tractor. With the engine OFF and the PTO dis-engaged. Turn the PTO shaft by hand Clock-wise (looking tword the front of the tractor) this should turn the mower blades.) Now turn it CCW and the OCR should click.

Actually this is safer than traditional OCR's as the PTO shaft also stops turning when tractor power is shut off. However, it could be inconvienent for use on multiple implements.

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Jeff-oh

09-13-2006 05:59:07

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Re: Over run clutch in reply to Jeff-oh, 09-13-2006 05:47:05

This is the style I am used to seeing.

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Jeff-oh

09-13-2006 05:58:08

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Re: Over run clutch in reply to Jeff-oh, 09-13-2006 05:47:05

I went to Bareco's site and this is a new OCR to me. So yes it should be on the implement side per their directions.

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Jerry/MT

09-12-2006 13:49:47

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Re: Over run clutch in reply to Allan S, 09-11-2006 21:46:40

Alan, whoever told you that must have confused a slip clutch with an ORC. The slip clutch protects the implement by slipping at a certain level of input torque and it is mounted on the implement.My rotary cutter has a slip clutch on it and it is mounted at the connection to the gearbox. The ORC has a different purpose. It doesn't limit torque. It only allows torque transmission in one direction, from the tractor to the implement. It's kind of like a mechanical check valve or a electronic diode. Tractors that have a transmission driven PTO require it for use with high rotating inertia implemnts becasue if they are not used, the implement can actually drive the tractor with the engine diconnected from the power train via the foot clutch. Hope this helps you.

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John (UK)

09-12-2006 07:41:24

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Re: Over run clutch in reply to Allan S, 09-11-2006 21:46:40

Thank you for that Allan, glad it all helped.
The noise is nothing to worry about, more than likely it will be the pawls or balls that transmit the drive flopping around as it starts up, you can hear it again when you put your foot on the clutch and the mower is still running as it slows down. The ORC will only work on the tractor end of the PTO shaft. There is always someone who has a theory about a particular subject which totally contradicts everything that you have heard previously.lol

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Jeff-oh

09-12-2006 05:39:56

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Re: Over run clutch in reply to Allan S, 09-11-2006 21:46:40

The OTC should be fitted to the PTO on the tractor. It the clicking noises are normal. What is not normal is that it is installed backwards. "I have been told the ORC should be fitted to the implement end"

OCR's only transmit power in one direction. Since you put it on the implement end it will only trasmit power from the implement to the tractor. Put it on the tractor and all will be well.

Jeff-oh

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