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?
Thanks for any and all help,
Randy
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?
Thanks for any and all help,
Randy
