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AC WD45 Power Steering Resevoir

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Jim

12-02-2001 15:43:17




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I was lucky enough to find a good used original Allis Chalmers power steering system for my WD45 restoration project. I will be installing a loader so the PS will be a great addition. I removed all the parts from the donor tractor this past week. I am really impressed with the job Allis did with integrating this power steering system onto the WD45. The steering valve and motor are solidly mounted to the frame which should prevent twisting and breakage which I have heard is a problem with some of the aftermarket pump kits. I was able to get all the parts needed except for the reservoir. This reservoir is Allis Chalmers part #227399. Any of you good people out there have a good used one lying around or have any leads on a dealer who may still have a NOS part? Also, any of you oldtimers out there have any school of hard knocks experiences with the Allis Chalmers pump system as compared to the aftermarket kits. Which is best? Thanks in advance for any help? :)

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David T (MO)

12-03-2001 11:02:08




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 Re: AC WD45 Power Steering Resevoir in reply to Jim, 12-02-2001 15:43:17  
Can't help you with the reservoir, but I'd suggest you check the oil level in the control valve. Mine was completly empty and full of rust and condensation. I still havn't figured out a way to disassemble the valve since there is no way I'm going to be able to pull the valve out the back of the body through all that rust build up. Since the valve does still work, I've added oil and will wait until its time to overhaul the engine before tackling this problem.

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Jim

12-03-2001 18:36:32




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 Re: Re: AC WD45 Power Steering Resevoir in reply to David T (MO), 12-03-2001 11:02:08  
Thanks for the tip. My valve appears to be OK. The fittings where the hoses bolt up were clean and had clean oil around them when the old hoses were removed. With the valve on the bench the steering valve appears to "shift" OK, that is, I can hold the input shaft in one hand and the output shaft in the other and try to turn them in opposite directions which causes the input shaft to move up then down when opposite direction is applied. Also, I am planning on "cleaning" my pump by submersing in white Kerosene and spinning the driveshaft slowly with an electric drill. I figure this may flush out some of the possible debris and crud in the pump. Worse case, if it will not work properly It should be cleaner for disassembly. Thanks for the tip.

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David T (MO)

12-04-2001 06:34:47




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 Re: Re: Re: AC WD45 Power Steering Resevoir in reply to Jim, 12-03-2001 18:36:32  
Sounds like you have things well in hand, however just to be sure we're on the same page...

The hydraulic pump is the part that the fan belt drives. The unit you describe with the input and output shaft is the hydraulic motor. The control valve is the smaller cylinder mounted behind and above the motor and sits along side the input shaft body. Its roughly six inches long and maybe two around. There is a fill plug (3/4 inch I think) on the top rear of this valve body and a drain plug on the bottom front of the input shaft body (the hydraulic motor sits in front of both). The oil in this control valve space is complete separated from any power steering fluid. Many times it is forgotten and slowly leaks away over the years (as mine did), to be replaced with condensation and then rust.

My steering appeared to be working fine and I only noticed the rust, etc. when I opened the valve to adjust for a slight left drift. I had no problems with the adjustment but if I ever have to disassemble the control valve, the rust will certainly make things... interesting.

Good luck with your installation.

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