Re: Rain Cap

Posted by Hugh MacKay on May 29, 2006 at 03:45:12 from (209.226.247.151):

In Reply to: Re: Rain Cap posted by jdmike on May 28, 2006 at 12:48:17:

Mike: Rain caps are truly yesterday's technology. I read your post yesterday, remembered the new mufler I put on my Farmall 140 last year was some what different from earlier Farmall muflers. I looked yesterday and there are two baffles that would deflect water to the outer walls of mufler. The perferations on the inner pipe don't go all the way to the bottom, thus water deflected to the outer wall would be traped in the bottom of the mufler. My guess is it would perhaps hold a couple of cups of water. Soon as one fired the tractor up that would evaporate with an hour.

And your also right on rain caps, over the years I've seen tractors with rain caps blow just as much black wet soot as the tractor not even covered in an overnight situation. Long term would be a different story.

If one measures the size of a stack, times the inches of rain fall, the volume of water over night will be quite small as long as water hasn't been deflected artificially. Tractors out in the open as long as the exhaust is tight will never get enough water to hurt anything even with stack uncovered over night.

I remember once my Farmall 300 and 560 sat for two days in an open field, in a 9" rainfall. 560 had a rain cap, 300 stack was not covered at all. They both fired right up, and both blew about the same amount of black wet soot.

I don't know what some folks use when they talk about heavy rain caps. I remember an old guy with a D7, used to do custom bulldozing in our area. He used to put a brick on top of the rain cap. He had more dings on the hood of that old D7 from the brick falling off. I never could figure why he didn't just throw the rain cap away and carry a can that fit snugly over the stack. I guess the brick stayed on the operators platform, better than the can during the bulldozing hours.

I guess most folks that like rain caps like the rattle at idle speed. At least I've seen guys adjusting their throttle to get the rattle just right before dismounting from the tractor.

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