2041-18 the number on the housing of units that IH used. If it came on the tractor the return line of unit goes to a tee in the reservoir drain hole. Pressure comes from the regulator and priority valve block right behind fuel tank, line comes out the bottom. Pressure check of system is needed to locate cause of problem. If the system pressure is good and priority valve dooes't work correct, most times if you pull one of the hand valves while turning steering wheel it gets easier to turn. Steering wheels were the same with or without power steering. Just the center caps were marked different on a 450. If the wide or narrow front are both in good condition, according to IH specs the narrow front takes a little less tourqe to turn steering wheel. If other steering parts and tourqe unit are in good shape the steering unit will work if 1000 to 1100 psi is getting to unit. They recomend the pressure being a little higher than that idealy.
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Today's Featured Article - Oliver 550 Purchaser Checklist - by Greg Sheppard. Pound for pound the 550 is better than anything I've seen. It has great power for its size and can really hunker down and lug. Classified as a 3-bottom plow depending on soil conditions. I personally don't think it can be beat for a utility tractor in the 40 HP range. They are extremely thrifty on fuel, at least my DSL is. Most drive train parts are fairly easy to get. Sheet metal is probably the hardest thing to
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