It's very irritating to me when some young cowboy with straightpipes jakes clear down to the last gear when empty on a level road. The message he is trying to get out is "look at me in my big truck". No wonder every town has engine brake signs.
The Jake brake slows down the tractor only. The trailer is just along for the ride when the Jake is used. The jake increases the engine's braking power by opening the exhaust valves just before the piston reaches TDC on compression stroke. That way there's very little compressed air left to push the piston back down. It's tricky because the exhaust valves have to be closed before the piston reaches TDC and they are timed so they close just fractions before TDC. Cat engines can eat valves if overreved with the jake on, like being in the wrong gear going down a mountain so the engine can't hold the load back. I tore one down that had been overreved and I found the valve heads from #1 cylinder in the oil pan. Jim
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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