Power steering loosing power

del · Feb 21, 2004

( I think one of the bigger
disappointments is the time it took to get pressure readings
on the pump. I think it would be reasonable to expect a more
responsive trouble-shooting process than JClark has seen. )

Am I missing something, or isn't it a bit bizarre the dealer
did not have a pressure guage or flow tester?

I was thinking of getting a pressure gauge for my home use.

Or is that a great sign that such things are NEVER NEEDED,
even my a dealer's shop?

Seems like one of the first things you'd have on hand after
a grease gun and oil drain pan...

/forums/images/graemlins/smile.gifDE L/forums/images/graemlins/smile.gif

nailerguy · Feb 21, 2004

Big Pete, I think that many of us did not look closer at the caster issue because the problem did not occur when JClark changed the tires. At least thats why I did'nt.

To exaggerate your theory a bit,if you were to raise the back of the tractor to a 45 degree angle and try to turn the front wheels, it would be nearly impossible as the tires would literally have to move the tractor in order to turn from full left to right. The tire would in effect become a lever when the wheel was turned rather than rotating on it's axis.

Nailerguy

bigpete · Feb 21, 2004

Nailerguy, I think that many of us did not look closer at the caster issue because the problem did not occur when JClark changed the tires. At least thats why I did'nt.
 Me too.

I think JClark told us originally that he noticed difficulty steering under a heavy load right after the hydraulic change. It was only later on he mentioned that the RM told him that he needed to get stock tires on the tractor. So I guess none of us really knew/know when the bigger tires were installed, or even that there were bigger tires until the RM mentioned it. When I first started following this thread I was sure, in the back of my mind, that a chunk of the siphon screen or magnet had broken out and cosntricted flow, or something like that--something from the hydraulic change.

The cause of the steering difficulty is almost certainly a combination of things now that we know a little more. Most likely the low-end hydraulic pressure would never have been noticed with stock rear tires, And...most likely the larger rear tires would not have caused any problem if the hydraulic pressure were in the mid-to-high range of the spec. That's my theory, anyway. It's still only a theory..

As to the old-time farmers using bigger rear wheels...putting even bigger wheels than an engineer intended on an old tractor without power steering will continue to make it a PITA to turn under a full front-end load. Ever used an ag tractor without power steering and with a front-end loader? You can't turn the front wheels unless you are moving, no matter what size rears you have on. If you ever screwed up the steering dynamics on an old tractor, it would be hard to tell. With power steering, we've grown to expect fingertip steering under any condition. It's not like the conditions with JClark's tractor were completely disabling. /forums/images/graemlins/shocked.gif

JerryG · Feb 21, 2004

There is no use saying anything else until JClark revisits with an update. Theories are not worth anything unless they are proved or have experience to back them up.

Trev · Feb 21, 2004

The thing about this that has always puzzled me, and perhaps just because I don't know much about the mechanical aspects involved, is that he says the wheel turns one half turn in either direction, and then simlpy won't turn any further. Why one half turn? Is there a clue in that which we're missing?

Bob

bigpete · Feb 21, 2004

Theories are not worth anything? Sure they are, Jerry! Lighten up! /forums/images/graemlins/grin.gif It's a discussion forum. I thought that was why we are here. You've shared your theories here at TBN on occasion, and I think in this thread, haven't you. /forums/images/graemlins/confused.gif

As far as experience, I own a 4110. There's tons of related experience from other members weighing in on this thread. I have been operating farm equipment for over 30 years, and some light construction equipment along the way. Most folks who are offering conjecture here are doing so from experience, reference, or the science in the matter.

JClark has reported recently. It has helped us to further our theories and perhaps some of these theories have helped him work toward resolving his problem. I'm enjoying the discourse, too.

JerryG · Feb 21, 2004

Pete,
We'll find out what is going on if his dealer will ever check it out. It just blows my mind how someone that calls their self a dealer can't even check his pressure.

bigpete · Feb 21, 2004

I think there's a post back a page that mentioned that his dealer did finally check out the pressure. It was at the low end of the spec range. They are adding shims to boost the pressure. We just need the report on whether that helps to remedy the condition.

It's now been said several times that it is amazing that a certified JD dealer would not have a set of tools for measuring the operating pressure of a hydraulic system.

JerryG · Feb 21, 2004

I must have missed it some how. Don't think that I would want them for my dealer, but sadly there seems to be more and more dealer like that every year.

DennoAce · Feb 22, 2004

bigpete, I hear ya, and thanks for the links. I am aware of this condition and of course it matters but not to this extreme in this case. He didn't put tires that were 10 feet high on the rear. If the PS system is that close to being maxed out then JD has a piss-poor design..which I'm sure is not the case. /forums/images/graemlins/smile.gif

I remember why it was discussed at all...because the JD rep mentioned it. I guess what I meant was I don't understand why it is still being discussed. I guess I will just have to say it plain...there is no way in hell those larger tires should affect the front steering on this little tractor. There is a universe of difference between a car that goes around a smooth track/road and a tractor with a bucket on the front and the design capability to lift hundreds of pounds off the ground front and rear, on purpose. If this is true than the steering would be inadequate every time he went down a (reasonable) slope forward, especially with a bucket full. And I assume this tractor was designed to do that and still be able to steer. Yes I know there is a diff. between caster and shifting weight to the front (ala going down a hill or adding larger rear tires), but the impact on the steering pump in this case would be similar...all the system understands is "too much load for me so I give up". It has no clue what angle the pieces are sitting at.

Anyway... next. Isn't this fun? /forums/images/graemlins/smile.gif