Quote:
Originally Posted by sawdustdad
J Mech, of course the stock clutch won't handle 50hp. but my point (and turbo460's) was that unless the 50 HP tractor includes pulling (cut tires) and lots of extra weight, the 50 hp will never get transmitted to the ground, and wheels will spin before the clutch 20hp limit is exceeded. I can't see any reasonable way a cub cadet tractor could get more than 20hp transmitted through the clutch since the OP has stated he is likely to use 2wd, and isn't setting it up for pulling.
Bottom line, a 6pin driver and double clutch plates will probably work fine for the OP's project. A pulling clutch with aluminum plates would not be advisable as they don't slip upon engaging. Perhaps adding a heavy duty spring would assure that the clutch would handle the torque. This would be a relatively inexpensive upgrade and still suit the intended use.
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I'm going to reply,
Via the conversation that the OP and I had over PM, this is what he intends to build. (Picture pulled from extrememotorworks.com)
cub cadet 4X4 019b.jpg
By adding the 50HP liquid cooled diesel (heavy) a second trans (heavy) big tires all the way around, duals or not (weight) a transfer case (weight) some sort of hydraulics (weight).... I don't think he will have any trouble getting 20 hp to the ground, and I believe a stock clutch will be inadequate given the big motor. As a matter of fact, if the tractor pictured had lug tires, and a bigger motor, I'm pretty confident it would come closer to stalling the hydro, than spinning. As it sits, with the turfs, it would spin. If he was running a Kohler, or even a Kubota diesel from say a 782, I think he'd be fine with the stock clutch.
Building a working 4X4 articulated tractor isn't easy. Making it usable, is even harder. I stand by my opinion on the clutch, as I base it off of years experience with repowers, turning up tractors, and custom clutch builds in construction and oil field equipment, and just generally dealing with this type of equipment on a daily basis. I feel my opinion is based off enough experience to justify it. I will also state, that I don't want to debate it any longer. I stand by my position.