Posted by Rudy2 on June 30, 2013 at 19:46:54 from (220.127.116.11):
Any Long tractor experts out there? Long is a brand that was sold under the Allis Chalmers name for several and they are really tough tractors. I have a Long 445 which is 4wd and has a 3 cylinder diesel engine which puts out 40-45hp. I have done things with this machine that no one should ever do, and it has been solid as a forged steel hammer.
It features power steering and that is the problem. It uses not the later "hydrostatic" steering but the type that uses a conventional steering box with a standard hydraulic pump and a hydraulic slave cylinder. I cannot get this arrangement to work. I rebuilt the pump, and that helped a little, it brought output up to 500PSI for a while but then the pressure fell off again. I am sure that even 500PSI is way too low. I rebuilt the mechanical steering box since it had been toasted by the lack of power assist and high steering forces. And I replaced the usual gearbox sump oil source with a remotely located reservoir (as I think they did with the later hydro-static units). I am at wits end on this thing. The slave cylinder moves as it should and does not leak, so I do not suspect it. At this point I am suspecting that a wrong hydraulic pump was fitted as the flange arrangement seems different from the factory manual. The pump now fitted has two SAE type O-ring ports, but the factory manual shows four bolt flanges being used instead. Otherwise the pumps look the same.
From what I can tell by research, the correct pump is part number TX11234. Is that correct? I think someone may have accidentally put a reverse-rotation pump on this but I am not sure.
So (this is very important), if looking at the standard pump with the input shaft facing you, what is the correct direction of rotation?
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