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How safe is JD Two-cylinder Power steering ?

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Don

07-16-2003 05:55:36

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I see many posts on Two-cylinder power steering problems. Has anyone had any accidents after the steering failed ? What happens if the steering fails while traveling down the road at 12 - 15 mph ? Would like to hear any comments.

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buickanddeere

07-17-2003 17:22:12

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Re: How safe is JD Two-cylinder Power steering ? in reply to Don, 07-16-2003 05:55:36

If you are using a tractor with a known steering problem due to wear or damage. Or did a tinker repair to a steering system. Then don't be suprised that it fails and the tractor turns greasy side up with you underneath. Doesn't matter if it was power,manual stearing or what brand. Other wise worry about something else that's going to kill you like that pack of smokes in your pocket or not wearing your seat belt.

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tom

07-16-2003 14:47:17

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Re: How safe is JD Two-cylinder Power steering ? in reply to Don, 07-16-2003 05:55:36

Gentlemen,

How does the potential for a non power-steering two-cyl-JD play for making a sudden L/H or R/H turn with final drive wide-open? I know a lot of this is common sense, road types/conditions, etc. It is also fair to say that if a tractor falls over on you @ either 10mph or 15-20mph, the level of pain in either scenario is moot, if you are still alive. I have an MT and like to take her in 4th wide open on the paved road to burn some fuel...I would appreciate your opinions.

thanks,
tom

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Clooney

07-16-2003 15:05:39

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Re: Re: How safe is JD Two-cylinder Power steering in reply to tom, 07-16-2003 14:47:17

Tom, on the non power steering Deere's parts do fall off & break as well as bind & jamb. But even so they usually don't make the violent sudden turns that the powered ones do.
~Even if the steering shaft pulls out or breaks it will travel straight for a while before drifting off to one side. The power steering tractors are the bad ones, when the hydraulic part fails the wheels slam over to one side or the other with more force than 6 people could stop.
~Even stepping on a single brake pedal too hard can cause a loss of control but unless panic sets in it is usually controllable.
~The non power as well as the powered units do have a problem with the roll-o-matic breaking off at the pin but fortunately that usually doesn't happen at road speed but usually happens on a turn in or out of a rut or hole & for some reason more when traveling backwards.
~Just treat your tractor like your car, if the steering starts to act or feel different check it out before using the tractor. Look for loose parts & missing pins & bent linkage before each use & you won't get any surprises...

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tom

07-17-2003 05:29:14

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Re: Re: Re: How safe is JD Two-cylinder Power stee in reply to Clooney , 07-16-2003 15:05:39

Thanks !

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ChuckW

07-16-2003 07:30:28

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Re: How safe is JD Two-cylinder Power steering ? in reply to Don, 07-16-2003 05:55:36

I've worked on a lot of these and have had many of them, however you have to respect them and keep them in good shape. Like on the 20 series as previously posted, a wire through the roll pin is a must, on the 30 series the shaft cannot back out. I'm sure if the control fork broke you would not be able to physically overpower the steering. The steering is mechanically fasted to the worm to the shaft however pressure would be too great to control. Another thought is the later model that have no mechanical linkage, think of a blown hoze or malfunction on them at high speed. Enough to keep you awake at night....best to check out and know your equipment, Unfamilar equipment, go at a slow pace.

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Clooney

07-16-2003 06:11:59

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Re: How safe is JD Two-cylinder Power steering ? in reply to Don, 07-16-2003 05:55:36

Don, you ask a very valid question.
~There are some inherent problems with the early Deere 2-cylinder power steering systems. ~While some of the problems are just annoying & can cause sticky or poor power assist, there are a few problems such as a pin that breaks off or falls out. Or a loose connection at the steering valve fork that can cause AN INSTANT R/H or L/H turn, & that can & has been fatal.
~If a sleeve pin should fail or the steering valve fork nut should break or come loose while driving down the road at 12-15 MPH the tractor will more than likely make a sudden & UN-STOPPABLE turn to one side or the other. That usually results in a tractor flip over. If you survive or not depends on how you & the tractor land.
~It pays to keep an eye on any changes in the Deere power steering feel or reaction & if it feels funny or starts to do strange things at least check it out.
~There have been a number of people killed over the years due to sudden & unexpected turns from the 2-cylinder power steering systems. The later systems with the improved worm & sleeve are better at not making sudden turns..

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GPWT

07-16-2003 09:27:17

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Re: Re: How safe is JD Two-cylinder Power steering in reply to Clooney , 07-16-2003 06:11:59

What is the "later system that is better at not making sudden turns"? Is this on the 30 series? I ask because I collect the tractors from the 1920's and early 30's, but I use a 730DESRC on a regular basis.
Thinking about an 8,000 lb tractor on top of me is not particularily comforting...

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ron in MN

07-16-2003 07:34:24

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Re: Re: How safe is JD Two-cylinder Power steering in reply to Clooney , 07-16-2003 06:11:59

Good question and good answers. But I'd like to add just a bit so we don't get a totally fatalistic feeling about this.

First, those old two cylinders only do about 10-11 MPH (not 12-15 as stated) in their road gear.

Second, any steering mechanism on any tractor, power or manual, can have failures. Many other makes of tractors and I think the newer JDs all travel at higher road speeds. We had a Farmall M when I was a teenager and it did about 17-18 MPH on the road.

So the potential for an accident related to steering is present on any tractor, and more pronounced on the higher row crop styles. Always be cautious and alert.

To add some validity to this, I am an owner of a hobby John Deere model 50 with power steering and I reworked the system a couple years ago. It does have the later system, but I still think of the potenetial for an accident every time I take it on the road.

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jdman(MO)

07-16-2003 08:28:40

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Re: Re: Re: How safe is JD Two-cylinder Power stee in reply to ron in MN, 07-16-2003 07:34:24

The Model 70 will push 20 MPH in 6th gear. Russ

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F-I-T

07-16-2003 08:37:19

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Re: Re: Re: Re: How safe is JD Two-cylinder Power in reply to jdman(MO), 07-16-2003 08:28:40

She must be a gasser, because my 70 Diesel tach says 11 1/2 or 12 at rated speed, and the scale stops at 14 mph.

Frank-in-Tallahassee
70D // 855

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jdman(MO)

07-16-2003 08:50:22

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Re: Re: Re: Re: Re: How safe is JD Two-cylinder Po in reply to F-I-T, 07-16-2003 08:37:19

Yep its Gas, even Reverse is pretty fast. Its what Some have referred to as a Southern Belle, No PS, No Live PTO. Of course the 13 inch tires do not help much. To me 5th seems like 6th on a 720. Russ

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Mike

07-16-2003 06:05:55

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Re: How safe is JD Two-cylinder Power steering ? in reply to Don, 07-16-2003 05:55:36

I have heard of several incidents of crash and bash because the roll pin that holds steering shaft in fell out. I like to replace with new rollpins and run a safety wire through them.

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