over center clutch

Anonymous-0 · Sep 17, 2009

I recently bought a 600D with a hand clutch. It works fine but I am just curious about the pros and cons of this over center clutch versus the foot pedal and pressure plate arrangement. Thanks

M Diesel · Sep 17, 2009

Over center types have a higher torque rating in general, not that it matters in this case. Once you have enough, you're done. The cams can create more pressure than just springs.

I think they are easier to feather, as long as you don't have to be looking backwards. On the crawlers people tend to leave them open while idling and that just isn't good thing, particularly for the shaft bearings.

Hugh MacKay · Sep 17, 2009

M Diesel: I remember growing up near an apple growing area, and John Deere tractors with hand clutches. Backing was a factor. They had an unusual number of farm workers pinned between wagons and loading docks. It was so bad, government passed a law saying you couldn't haul wagons to the warehouse with a hand clutch.

M Diesel · Sep 17, 2009

Hugh, I could really see that as problem with JDs. Since they engage by pushing forward, going backwards gives positive feedback to the lever, meaning they tend to self engage and stay engaged when reversing. Combined with that engine, I never liked working behind behind one. Old crawlers are opposite, so that story is different. I like the way they work.

Of course nothing is perfect. On my MD foot clutch, I have a problem getting my foot in the right position. It wants to engage while my ankle is in a kinda bad spot. If I'm not careful I end up having to reposition my heel just about the time the danged thing wants to grab. Some re-adjustment probably wouldn't hurt.

I have never worked a hand clutch on a IH. Which way does the 600 clutch engage?

Wardner · Sep 17, 2009

Perhaps if you swapped your foot clutch pedal/lever
with one from a 400-450 (maybe 560, too) it might be more
comfortable. The diamond tread surface is canted
towards the operator.

John G. Hasler · Sep 17, 2009

> I remember growing up near an apple growing
> area, and John Deere tractors with hand
> clutches. Backing was a factor.

Yes. My JD60 was a pain to back up. I liked being able to drive standing up, though.

Hugh MacKay · Sep 18, 2009

M Diesel: The only hand clutch I ever operated was a Cat D6 doing a bit of bulldozing. I had friends in the apple growing area relayed that story to me. I liked it on the dozer, course on those old machines one was using brake along with steering clutch.

On Nathon's 600, just how much different will the actual clutch be? Between pedal and hand control?

Harold H · Sep 18, 2009

In the Mississippi Delta, most all wheel type (standard type) tractors were ordered and sold with hand clutches. The hand clutch was standard on the rice tractors because the operator would normally stand up, but on the non rice wheel tractors I guess it was just a area preference.

Harold H

M Diesel · Sep 18, 2009

Interesting idea on the pedal. Brother just got a gas 450 not too long ago but haven't spent any time on it. Something to check out the next time I get to visit.

For me, I like foot clutches, but the hand clutches are easier to work and easier to feather. My TD18s have a 17 inch main clutch rated for 1500 foot pound torque continuous use and they feather very well with two fingers. The TD18 (a '49) has a standard button clutch (round pads) and it mostly likes to be either in or out, the 18A has a newer style button type with somewhat rectangular pads and it is very smooth, and I'm not sure what is in the 182. All three work much better than the foot clutch on an M. You just don't have to fight that spring pressure.

Steering clutches? That is another story for sure. There is a reason they added hydraulic boosters to them things :lol:

Do any of the IH wheel tractor clutches use button style or are they all fiber surfaced?

Harold H · Sep 18, 2009

M Diesel,

When the 706/806 came out in 1963, the International 706 & 806 had a Dyna Life pad disc on both the foot clutch and the hand clutch versions. Prior to that all were regular clutch disc material. We sold several I-806's all equipped with a hand clutch and one I-2706 to a local construction company, also equipped with a hand clutch.

Harold H

Anonymous-0 · Sep 18, 2009

Thanks guys. It is always interesting.

M Diesel · Sep 18, 2009

Cool info Howard, as always. Thanks.

over center clutch

Anonymous-0

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Hugh MacKay

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Wardner

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