Don't think all O-4 had the low speed low,there was a serial # break. If you have the O-4 low to put in a H you will need to use the lower shaft and all the gears,reverse idler gear and all gears on top shaft,they will work on the H main shaft. The O-4 main shaft will have a different ratio than a H one,also the rear mainshaft bearing cage is different between tractors. O-4 transmission gears in a H will make 3rd and 4th faster. also some O-4 had the faster than standard 4th gear and it would make a H over 7 MPH in 4th if used.Only way to keep a H standard 3rd and 4th speed would be to use parts from a low low for a H tractor or modify the standard H 3rd and 4th speed driving gear for use with the other gears on the O-4 counter shaft.
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Today's Featured Article - Torque Wrenches - by Curtis Von Fange. When working with fasteners a torque wrench can play an important role in the correct assembly of critical equipment components. Lets examine in detail some of the reasons for using a torque wrench along with how to correctly use the variety of wrenches available. Applying the proper torque to a fastener accomplishes a number of tasks. First of all correct torque will hold the parts together. This may seem like a trite statement but � think about it for a second. Engineers have designed
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