Can't steer Allis 5020 4WD

It is getting increasingly harder to steer this tractor. I know that this tractor was hard to steer the day it was new but there is something going wrong. It is so hard to turn the wheel when not in motion that I need to pick the front end up with the bucket to turn the steering. It is concerning that some thing could snap with the steering wheel if I force it. You can see it flex in a way that is not normal. I was told that this is normal for this tractor but I am sure that it is not.

There are original type tires on this tractor I have lubed and looked at every thing I know to look at and can see nothing wrong. I have owned this tractor foe 3 years now and the steering is getting worse. So, I am hoping that someone that knows this model 5020 can tell me what is happening too it.
Thanks in advance, Bruce

If it was mine id tear the rreplaceable front end apart look for rusted joints in the front half shafts ive seen the ujoints inside the syeering knuckle break on older chevy trucks they get hard to steer for awhile then when it breaks you cant steer for you that would be very bad there are no hard parts for that frontend

Grease it up ! I bought a 185 that set out un used and was real hard to turn the wheels tore the front end down and greased it up , and could steer with a finger, I know you cant do that with a 5020 as they are a muther to steer have no idea you,d do it with a loader on

I found that the left hand half shells (this is 4wd) were extremely stiff. I dissasembeled, cleaned and lubricated everything. This helped  tremendously. You only need to be strong in order to steer, not Superman to steer.
I have found that the steering sector box is a resess in the top of the transmission case. It has no fill hole or drain hole. It is lubricated for life.  To access to the components within or check the lubricant a whole bunch of stuff has to come off, covering a, gas tank, braces and brackets. It's ton of work if you want to see if the lubricant is ok.  I have figured out that I can drill a hole through the case to get into see if there is viable lubricant. I can use a magnet in the hole to clean any metal debris left from drilling and tapping a hole.  I then will install a grease zirk and use corn head grease to fill any need for additional lubricants. It's supposed to be lifelong lubricated but after 38 years I am not sure.

put your drill bit threw a small magnet