The UK version of the IH Service Manuals in PDF format are available at the link below. There are some differences on the Louisville, KY, USA assembled tractor from the UK versions but the brakes are the same. The 464 is same as 454 with just about 5 more HP. Section Group 8 starting on Page 97 gives explanation of how the brakes work and how the hydraulic return oil from the oil cooler is used to feed the master cylinders, there is a screen and orifice in the hydraulic feed line to each master cylinder. IIRC very early IH 54 series tractors did not have the orifice in the feed line and that caused the problem you described. The other problem can be too much flow in the hydraulic oil cooler return line and there is a flow measurement for that.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I�m handing him tools and he says, "give me that..." and I�ve already got it in his hand or "hand me that....."and I�ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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