Allis chalmers 190xt steering problems

No priming needed other than turn the steering wheel. So, what did you do to the pump while you had all 100 parts scattered on the bench ???   A seal kit for each of the three sections ??  Those pumps aren't for a novice as there are several different ways to reassemble them WRONG.

Doubt it. Make sure the vertical priority valve spool on the rear of the pump is free to move up/down and the spring pushes the spool down into the bore. No new seal kits ???

Edited by DrAllis - 21 Dec 2024 at 5:27pm

the spindles are free. Also have a question of the 190s pumps. Is the priority valve the assembly under the 7/8 inch plug on top of the pump the priority valve? when I took the pump out of the tractor I first removed that plug and there was no spring. Am I just not looking deep enough into the furthest back section? I did not take the whole back part apart only the front three sections. Am I missing something in the pumps back? Also on the seal kits I did put new orings in the groove but not new plates and composite seals. The little plates where still straight and had no scratches or grooves on them. Do you think is should open the pump up again and replace the little plates and composite seals?

Thanks for the replies DrAllis and youngorange2000



Edited by Allis Eli - 21 Dec 2024 at 10:45pm

If this tractor is old enough to use the port plate on the back of the pump,make sure that you don't have a couple of the lines mixed up with their corresponding locations.

thanks guys, i will check the lines and spring. If my pump is missing the spring, where could I get a replacement? is it just a spring you could get at a hardware store if you knew the dimensions?

Thanks everyone for all the replies

Not just any spring. A specific relaxed length, wire thickness, coil count and spring pressure at a given compressed length.

serial number is 9327

If the supply and return lines are hooked-up backwards you will get the same results, with the steering wheel being ripped out of your hands when you start to turn it.

okay guys here is an update on the 190xt. the lines cross over each other like they should. I opened the plug and there is a spring in the top of the back plate. just to make sure it was primed, I cracked the lines at the steering cyl and oil did come out. It is filled with hydraulic fluid. So now I think either i screwed something up in the pump, Something is wrong with the spindles, or the steering cyl is messed up. I also ran the tractor around the yard today and it stopped ripping the wheel out of my hand. I just slowly turns and the steering wheel sorta vibrates.

Thanks

Also sounds like the pump may be starving for fluid? Did you cycle the steering wheel to full lock left and right which bleeds the system? As said above was the filter changed and the sump screen cleaned? The screen often gets overlooked and they will become clogged if proper maintenance hasn’t been done. As Dr Allis said those pumps should be rebuilt by a qualified technician. Please understand I’m not saying you’re not qualified but they have to have the proper clearances and fitment to perform correctly. I sent mine to SLI to have it completely rebuilt due to steering issues and hydraulic issues. I couldn’t believe what a huge difference it made and everything works like it should. That was back in 2016.