3ph won't lower without weight

[3RRL]

Rob,
I checked the other site and just realized you are already familiar with it. Try PM'ing Tommy at Affordable Sales.

 

[Soundguy]

Virtually all SCUT and CUT have power up and gravity down style 3pt hitches, if they are factory. ( whether they have position control, draft control or an inching control... ) Some manufacturers offer a downpressure kit using external cylinders... Also some conversions.. like for older IH and AC tractors use an aftermarket hitch kit that uses DA cyls and will provide down pressure.

In short.. the average CUT drops under gravity pressure, as the exhaust valve opens and lets oil escape from the lift cyl. Unless there is binding, generally the weight of the external 3p linkage is enough to caus ethe arms to self lower when the exhaust valve is opened. ( baring other problems ).

And i was yelling to get your attention, as you were posting some ver confusing and unrelated bits of incorrect info like it was gospell... newbies don't need to be reading that thing and thinking that 'draft' sensing hyds give them hyd down pressure... Draft hyds work the way they do, for instance, on a plow, as the plow tries to get sucked deeper into the ground, then the draft gets heavier, and the hitch adjusts the lift up to keep the draft where it was set, thus pulling the implement out of the ground some... if the ground gets softer.. say sand.. the draft will go lighter and thent he lift will let the plow plunge a bit... shape of the plow, and forward motion are what provide the drawing / sucking force that makes the plow want to plunge when pulled thru the ground... NOT HYD DOWNPRESSURE.. talk like your previous message is bound to mess up all this nice feng Shui going on here (grin).

soundguy

O.K. soundman,no need to yell at me,,,what is it called than when the three point goes down as well as up?[probably it goes down as well as up],,anyways,his probably don't do it? thingy

 

[greg_g]

Guys, the flow control valve is to regulate how fast the TPH drops when the lift control lever is pushed down. The valve is meant to be used by an owner who has implements of significantly varying weight. It has nothing to do with the lift arms coming up; whether on purpose by the operator, or incidentally by themselves.

Taking off from Marks 2nd possibility, what's happening is that the output of the pump is somehow seeping into the lift valve assembly - despite the lift control lever being in the lower position. It might be aggravating, but I don't consider it serious. Anybody that owns a TS354C has already become used to it.

//greg//

 

[Soundguy]

It probably wouldn't hurt to check to see if he has his drop valve al the way open.. it may help with keeping his 3pt cyl 'bled' off, depending on how they have the control valve plumbed. I'd love to se a hyd curcuit of it to see if the valve controll sboth fluid in, and fluid out on the same spool..e tc..

Soundguy

 

[thingy]

Soundguy,you the man! always great hearing from you,,and you know what downdraft is,[I did have a question mark after it],,,I thought some of them yanmares had downward pressure,,probably just a rumor,,,,thanks for helping us out once again,always informative,,I'm not kidding,[grin].
Must not be no foton owners on here tonight,,,robt,,there are about 3 chinese tractor web sites,,ctoa,nyctoa,pa tractor,chinese tractor owners club,,might find one or two of them with a search,,,not saying you'll get any faster help there,but you might find dealers addresses or something to help.
thingy

 

[RobT]

Hello All:

Thanks for all the suggestions and helpful advice. I'll keep you posted on what I find out. I really like the Foton--it looks good, handles very nicely, and was much cheaper than the US brands.

Thanks.
Rob T

 

[kingjames8283]

RobT, an idea I have might help you during the times your hooking and unhooking your 3pt attachments. Keep some barbell weights around and find a method for temporarily attaching them to your 3pt arms. The internally leaking hydraulic system may or may not correct itself as the weather warms up. It's very possible you have a bad valve control that is allowing hydraulic pressure to bypass it's stop. Since you didn't identify at what point this problem started, I'm only assuming that maybe this is something new brought on by the very cold temperatures. At any rate it certainly sounds as though the control valve that controls up/down motion will have to be adjusted or taken apart and rebuilt to regain it's holding pressure. Neutral position on the hand control is always "Dead-Stop" (nothing moves). When this fails even on a brand new tractor it should be adjusted or rebuilt by a qualified Hydraulic Repair Shop and/or a Chinese Tractor Repair shop versed in those type repairs.

I realize that on these small Chinese tractors the operator must physically move the control to neutral position but on the much larger Heavy Equipment that I have operated over the years, simply taking your hands and feet off of any control on that piece of equipment automatically puts that control into neutral position effectively stopping it. I also refer to the term "throwing your hands up", which means if the equipment did something you didn't want it to do, throw both your hands up into the air immediately which stops everything and then evaluate the situation and start over. On Chinese tractors this feature isn't available yet but I hope someday to see this on every piece of equipment made or brought into the United States.

BTW on older train locomotives there was a heart attack bar which worked on the same exact principal as above only this bar was held down by your feet. If anything happened to the engineer while the train was in motion, he could either remove his feet from the bar or if worse he would fall out of his seat which would bring the train to an immediate halt. Problem was and the reason locomotives no longer have this control is because the engineer would always bypass it like a cruise control for trains by placing some kind of weight down on top of the bar rendering it useless.

The moral to this story is this, almost all types of equipment from small to extremely large have safety controls built-in in some form or another. Don't defeat or bypass this equipment if installed because it's designed to save your life or the lives of others. Safety is no joke, take the time to do it right the first time and if it's broke or malfunctioning - Fix It. The very second you think you've got the bull by its horns, guess what that bull will turn on you. Your tractors will do the same thing. Think safety. In aviation we have a saying, "There are no Old and Bold pilots". The pulpit is now open.

 

[Paddy]

RobT,

My Kama 454 does that some times too. It would just slowly inch up over time though. Most of the time I have some thing on the 3PH, like a grader blade, so no problem. After shutting the engine down, I just stand on the lift arms. I have concidered the 3PH as stiff or tight.

After 5000 hrs, your will wish your 3PH was that strong again!

 

[RobT]

Thanks for the barbell suggestion, kingjames8283. That's a good idea. It would also give me a close idea of how much weight I have to apply to ease the bars down.

Paddy, it's good to know I'm not the only that has this problem. Also, I notice you're from Bloomington, IN. I was born there and attended college there. It's a great area down there.

Thanks for all the suggestions and comments. This is a great site.

 

[Brad_Blazer]

My KM554 does it too. Just like you describe. Otherwise it works great. I can park it a week with the box blade 1/2" off the ground and it will not leak down.