Posted by LenNH on November 13, 2009 at 12:36:44 from (71.192.137.159):
In Reply to: Farmall B exaust lift posted by Leon Torkelson on November 08, 2009 at 09:17:29:
In FARMALL LETTER SERIES TRACTORS (Fay and Kraushaar), there is a very brief description of this system, which isn't very useful, but it might be worth something to you: "The small tractors used the Pneumatic Lift-All, which operated off the exhaust pressure from the exhaust manifold, NOT with vacuum from the intake as is sometimes thought because the vacuum just didn't have enough power. A control valve operated the system but was quite sensitive to poor maintenance due to the hot, corrosive gases used." This corrosion must have been a problem, because the thing you most often hear about this lift is that it was difficult to maintain. I have vague memories of seing this apparatus described in the I&T manual, but can't swear to this. I also seem to remember photos of the contraption in old IH sales literature. I am going to dig around in my so-called collection of this stuff to see if I can find it. I do remember that there is a diverter valve located--I think--in line with the exhaust pipe. This seems to have been an IHC attempt at a system independent of the transmission. Maybe they didn't want to spend the money for independent hydraulics, or maybe it just didn't occur to them when the A and B first came out. Never used one, but I've never heard much good about it. When it worked, I guess you could push the clutch in and if the motor was running fast, you'd get enough pressure to lift your cultivators. Hard to imagine that it was very fast--the piston was huge and would have needed a fair amount of exhaust gas to move it. One reason this might not have caught on is that on an A, at least, you had one-row cultivators, and they weren't all that heavy. A two-row cultivator is a little heavier, although in my experience with F-12 two-row cultivators, one side at a time was lifted and dropped, so it wasn't as heavy as you might think. Another issue might just have been the extra money it cost to get this accessory. When this tractor came out, a lot of small-farm operators just didn't have a lot of cash, so they avoided buying what they didn't absolutely need. My father ordered the hydraulic power lift on his 1938 F-12, but his brother bought an identical tractor without the lift (he was a thrifty guy, and besides he probably figured the hired man could do the lifting!).
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