Breaking in my new toys... from Yeehaw! to Uh oh!

Spiveyman · Sep 7, 2007

Thanks john_bud & jbrumberg. I spent the last hour looking for other threads on the subject. Found several, but I'm not sure I found what I was looking for. I also foung the link to NH's web site and part search. That may be helpful. I printed off the exploded views of the whole thing so I may at least be able to see if there's something missing. I really don't know much about the mechanics of the 3ph, so I'm not even sure what a rock shaft is or where it is. Hopefully it will make more sense when I sit down in front of the thing with the schematics. I also found an I&T manual on ebay and bought it. Figured I'll use it eventually even if I don't wind up needing it here.

I'll try to get pictures if I can't figure it out and post them here. I'm looking forward to getting to know my tractor better!

I think that's important before I'd start sleeping out there with it! HA!

jbrumberg · Sep 7, 2007

Spiveyman:

I have been tractoring for over 20 years and I have messed up a lot over time

,

and

(and still will on ocassion) and I still do not know what a rock shaft is

. I guess I have to go research out this on the internet. I really hope your "problem" is a cheap "fix". Keep us posted. Jay

texasjohn · Sep 7, 2007

Just found this thread.. am slow..Am agreeing to
Goldenrod
Use gearing to achieve comfortable speed, not clutch
hope 3ph fix is simple
toothbar will be big help

great looking place... ideal for short duration high intensity grazing, electric fences. umm... gonna be hard to do that from afar... 1/2 day grazing makes big difference in forage consumption... thus, intensity of grazing will have to be reduced since there will be times when you will unavoidably not be able to get there to move cattle to different grazing cell.

Spiveyman · Sep 7, 2007

jbrumberg said:
Spiveyman:

I have been tractoring for over 20 years and I have messed up a lot over time , and (and still will on ocassion) and I still do not know what a rock shaft is . I guess I have to go research out this on the internet. I really hope your "problem" is a cheap "fix". Keep us posted. Jay

Ha. Thanks for making me feel better on that one.

However, I got food poisoning this afternoon at an IHOP and have been sick as a dog since early this evening and it's not over yet.

I'm dehydrated and my wife seems to think going to the farm in 90°+ weather to work on a tractor is not wise.

As much as I hate to admit it, she's probably right, so it may be a few days yet before I can get out there.

texasjohn said:
ideal for short duration high intensity grazing, electric fences. umm... gonna be hard to do that from afar... 1/2 day grazing makes big difference in forage consumption... thus, intensity of grazing will have to be reduced since there will be times when you will unavoidably not be able to get there to move cattle to different grazing cell.

Yeah, we're working on that. Plan to move about 10 min away from the farm this winter/spring depending on how long it takes to sell our house here.

john_bud · Sep 7, 2007

When it rains it pours! Now you got the IHOP (to the bathrooms)!

Jay, Once again you are 23 posts ahead of me.

jb

sandman2234 · Sep 7, 2007

Sorry for feeling bad, but that isn't food poison, it is tractor withdrawals. Your already missing your tractor and the great seat time, and having acute withdrawals from it. The initial shock of it feels a lot like food poison, but it isn't (and I KNOW what food poision is, BTDT). Your only choice is to stomach the nausea and get back out there to work on your blue baby.
Hope it clears up quickly,
David from jax

jbrumberg · Sep 8, 2007

Spiveyman:

Food poisoning is pretty nasty business

! Food poisoning paired with the withdrawal symptoms of acute tractoritis rapid onset type has been known to be fatal

. As much as you probably do not want to- stay hydrated. I hope you feel better

.

john bud:

I have an advantage as it relates to posting on TBN- I am still not allowed to go back to work for medical reasons (since the end of July and no one is referring to my mental status yet

), so I spend long periods of the day staring blankly at the computer monitor "waiting for some action". The really sad thing is that I am still not allowed to do the tractor thing (yet) and I have not had any real seat time since the end of July

(which really, really blows). I do go out to look at it daily. It is only 50 feet from the house and looks very lonely and unused

. I hope to get back on the seat in a couple of weeks. My wife (who is able to telecommute) has chosen to work from home since this began due to her correct beliefs that I require constant adult supervision to keep from getting myself in trouble. Unfortunately she has a lot of "backup". The amount of "adult supervision" I am receiving makes me believe I am in adult day care.

. Jay

john_bud · Sep 8, 2007

You may not be back to work, but you are keeping your brain active with loads of tractor trivia! Here's to a speedy recovery.

jb

jbrumberg · Sep 8, 2007

Thanks- jb

!

By the way I checked our post numbers and you are actually 1,473 posts ahead of me

! I guess I better start welcoming every single new TBN number and blather on every single post (some might think that I do that already

). Jay

PS: The fact that I can not safely drive the tractor yet has not stopped me from researching out more attachments and I will be visiting my local tractor dealer next week (I am allowed to drive my truck

.) to order some parts

.

JC-jetro · Sep 9, 2007

Spiveyman said:
. When I got down to look at it, the whole BB was sitting at a peculiar angle. I raised and lowerd the thing, it appears that only the left arm is lifting. When it gets to too much of an angle the right one comes up too. I drive it back to the barn with the 3ph half way down to as not to tear up the tire or anything else. I tried to get the BB off the 3ph so I could look at it, but it was in a bind, it was dark, and hotter than blue blazes. So, I'll tackle that next time I make it out to the farm. Probably be next week.

In the mean time, any bright ideas out there as to what might cause the right arm not to lift?

Hey Tim,

Hope you are on the road to recovery after your food poisoning.
I downloaded the guts of your lift system for review. The principal of operation is the same with some minor changes. Some easier to repair and some tougher. Most of the CUT and SCUT have one lift piston usually located below your seat, in case of my 1700 lift piston and cylinder can be easily taken out from front by removing the lift cylinder head but a lot of the tractors requires complete removal of the cover to retrieve the piston assembly in the rear differential. Yours happen to be one of them. On some bigger tractor there are two lift pistons that are externally located and much easier to repair and maintain like the Kubota pic I have at the end. Now by the action of hyd pump and a spool valve(usually open center) the compressed fluid will push the piston against the cylinder wall that causes linear motion of the piston. This motion is then carried to a fat push rod, ram rod . Linear motion of the ramrod is translated to rotational action of rockshatft and Viola... your lift arms rotate up to lift thing up. Once your allow the trapped oil to dump back to differential by lowering the lift arm then gravity , lift arm weight or implement caused the arm to drop.

I know I'm preaching to the quire but I still feel not every one has a good grasp of the concept.

Now after all that jazz... what is the diagnosis of your problem.

1.Since your lift arm on one side works, then I remove the possibility of lift piston seal failure.

2.Since on side moves up and one side does not, then it proves that rock shaft rotates. So your ram rod, push rod and pivot assembly on the rock shaft is working properly.

3.I guess your problem lies with either rock shaft splines on one side is totally gone, rock shaft is twisted severely and hopefully one lynch pin that attached the lift arm to the lower arm is broken or the rod between lower arm (draw bar) and lift arm is elongated and is in plastic region waiting to totally fail.

I hope the problem is a busted lynch pin. Check externally on the condition of the spline and the lift arm on the bad side.. take a pic and let us see that. Get close and square to the back of the tractor and take a couple of picture and let us know. If that does not reveal a tell tale sign , then I'm afraid you need to remove the lift arm cover to have a looksy inside.

Lift cover:

Rock shaft:
#2 Rockshaft,#1 Pivot arm, #10 Push rod

3 point lift piston:
#33 lift piston, #34&35 piston rings.

My 1700 3-point lift system assembly:

Lift cover that houses the lift piston and cylinder:

Part of the rock shaft going thru the lift cover, rock shaft is splined on sides
and the middle. Sides are splined in to one lift arm on each side.

Lift piston and cylinder:

Opposite side of the lift piston, pushing a rod against rock shaft assembly:

Horizontal rock shaft and the push rod that is pushed by the action of lift piston. The direct longitudinal motion is changed to rotational motion of the rock shaft causing the lift arm to rotate up or down , hence 3-point lifting action.

Kubota 30 series with two external lift pistons in lieu of one internal lift piston. Rock shaft is still there but it is not connected internally to any hydraulic system.

Well, I'm about beat by now.. I gotta go to bed .. good nigh ya'll. I hope it helped a bit. Let us know,

JC,