Allan, would this apply to most or all of the IH and Farmalls with the hydraulic pump bolted onto the side of the tractor (ie: Farmall 504). My 504 has to have the throttle gapped pretty good to make my loader raise, lowers fine. The other valve will roll the bucket both directions at fair idle. I have the hydraulic valves tore down on my bench right now, I did not try switching hoses first (dumb).
On one valve I found the un-latching piston frozen in place and the detent balls pitted. Also the detent balls spring is broken and the centering spring actuator is rusted and pitted. Searching CNH Parts right now.
I bought 2 used valves off Ebay for $230 shipped. I hope I can make two good ones and have a spare. I have enough o-rings for 4. I am going to make a new post...
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Today's Featured Article - History of the Nuffield Tractor: Conclusion - by Anthony West. In the last piece I mentioned that Nuffield had reached the stage where they had chosen to drop the "Universal" from production. The two new models were given three figure numbers, instead of "three" and "four". Model numbers were introduced to help farmers and dealers instantly recognize the engine size and horsepower of the tractor, the 4/60 had a four cylinder diesel engine which developed 60 bhp at 2,000 rpm. The 3/42 had a 3 cylinder diesel engine which produced 42 bhp at 2,000 rpm. Th
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