Foton: Instal an inline filter on hydrolics

[greg_g]

What do you think?

I think that's a good idea. But it was a bad idea for the original owner to have lopped the suction line off that short. I'm going by memory here, but I'm pretty sure the original piece (including the suction screen) was maybe 8" long. Probably went down to within 1/2" or so of the bottom. By the way, the actual hydraulic fill/vent (with dipstick) should be under the seat. Push the seat forward, and look for a square head about 1x1x1. It might even have been painted red at one time.

Given what you've described so far relative to prior care, I'm betting you didn't get manuals with this tractor (?) If not, there may be as many as four you should source;
-engine operations and maintenance
-engine parts
-tractor operations and maintenance
-tractor parts
Unfortunately, the Chinese have never seen fit to translate any shop manuals, but those four are much better than nothing.

//greg//

 

[valley]

RE: manuals, I did get two Series Y85 Diesel Engine Operation & Maintenance Manual, and Operation and Maintenance Manual. Haven't looked them over with a buying eye yet but I'm not impressed with what I've seen so far. I have seen better manuals with a lawnmower.
RE: Hydraulic Vent, there is one about 1 1/2" Dia.taped shut and and a smaller one the size of your thumb with a plastic hose on it that goes up foot and a half to container. This was done because the reservoir filled until it couldn't hold any more and there was some foaming. How high do you fill your reservoir? Richard

 

[valley]

greetings, There was a thread I was reading up until today and now its gone! The title was "No hydraulics or Lost hydraulics' the fellow who listed it had a tank as his logo. I had gotten to page 15 and there was many more pages. Good hydraulic suggestions and his discriptions were very good. The thread was started I believe in 2005 and continued to 2006. It was in Chinese Tractors.Has it been droped? can it still be found? Richard

 

[Affordable]

Valley,the Foton 25 hp tractors used the Yangdong Y385 engine,which uses a single CBN-314 pump.We put loaders on 90 % of our tractors and the loaders are quick and operate fine.I think the former owner did not know how to install the loader correctly and this is where the problem is,coming off the rear of the engine hydraulic pump the hydraulic line should go into the inlet of the front end loader valve,the outlet of the loader valve should feed a priority valve,then reconnect to feed hydraulics to the steering and 3-point.The way the loader is supplied hydraulics now from the valve tied open needs to be corrected.If you will take some pics from the hydraulic pump to the steering to the 3-point we can prob. help you figure it out.Foton & Jinma are 2-different tractors,however since you have the Yangdong Y385 engine which is the same Jinma used for years we can supply you those parts.Get your camera so we can help you

Tommy
Affordable Tractor Sales
"Your Jinma parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[valley]

Greetings Mates, She's alive! She's lifts, she's fast! Thank God!
I went to other threads and read what you wrote, and from what you were good enough to take the time to tell me, great suggestions all. From this I decided the what to aim at first. I can't tell you how much I appreciate your help. Friends were telling me " you can fix anything". But what I was thinking was "what have I done? Bought another thing to work on that I know nothing about and it's 12 degrees outside". Another 4' of snow and I wouldn't have seen it until may. It was snowing when I put the seat back on and started it. Not much snow in the driveway but too heavy to use the snow blower.
What a load off.
Oh! the out line from the FEL. Is there any reason I can't run it to the reservoir with an inline filter along the way? Thanks Richard

 

[Affordable]

OK,now are you going to tell us what you did to correct the problem ? Other owners can benefit from this thread also

Tommy
Affordable Tractor Sales Co
"Your Jinma parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[Brad_Blazer]

The main loop should run from the "power beyond" port of each valve set to the inlet of the next. Each valve set should also have a return line for fluid used in operation which can't go to the next valve without risk of a cumulative pressure problem. The last valve in my main loop is the 3ph so everything that is exposed is subject to high pressure. The return lines can be plumbed together through a low pressure filter. The fluid will only be filterd when operating the valves but all of it should eventually get the opportunity. I installed such a filter on my Kama. It was inexpensive at Northern Tool.

The quick-connect is for the return line from the backhoe.

 

[valley]

Brad, I didn't understand all of that. I'll read it again a couple times. Are all return lines are low pressure? I can get a filter that is rated at 12 gal per minute. I think that should be good. As I said I want to put it in the FEL ruturn line and take it to the reservoir. Does that make sence to you? Also It sure takes a long time to warm up the hydraulic fluid, at first nothing works but the steering. Than the FEL begins to work slowly. Once warm the FEL works great. Richard

 

[greg_g]

I'm not a hydraulics engineer, so perhaps I'm overlooking a technical argument here. But I don't see the practicality of putting a filter after the pump. I'd want the screen out the big chunks before they have a chance to damage my pumps. Further - crap that passes through the pump, then moves on to/through the actual hydraulic components that do your work. Matter of fact - in the case of your slow FEL for example - I'm still speculating that the problem is dirty controller valves.

I can see the advantage of a suction strainer and a return filter. Clean it up coming and going. But if you're relying on a return filter only, what good is a filter location that cleans up fluid that's already carried contaminants through the stuff that you want to keep clean in the first place?

What am I missing?

//greg//

 

[Diamondpilot]

I'm not a hydraulics engineer, so perhaps I'm overlooking a technical argument here. But I don't see the practicality of putting a filter after the pump. I'd want the screen out the big chunks before they have a chance to damage my pumps. Further - crap that passes through the pump, then moves on to/through the actual hydraulic components that do your work. Matter of fact - in the case of your slow FEL for example - I'm still speculating that the problem is dirty controller valves.

I can see the advantage of a suction strainer and a return filter. Clean it up coming and going. But if you're relying on a return filter only, what good is a filter location that cleans up fluid that's already carried contaminants through the stuff that you want to keep clean in the first place?

What am I missing?

//greg//

Greg and others, there are two sides to this argument. But look at it this way. Lets say a pump lets go into 1,000 pieces. It will go through the valves, cylinders and back to the sump before you knew there was a problem.

Now if your sump is clean and you are putting in clean fluid there would be no need to have a suction side filter or screen. I looked at all the hydro systems in the 50 plus airplanes I have flown and none had a filter or screen on the suction side. They all had filters on the return side. After asking our companies mechanic who takes care of our corporate flight departments airplanes he said he could not think of one with a filter or screen on the suction side. He said they all have filters on the return side. The thought is if a pump, valve, or cylinder lets go it will catch the debris on the way back to the sump before contaminating the whole system and doing further damage.


I also looked a tons of store bought log splitters and 95% of them had the filter on the return side. I feel that the hydro systems are very similar to that of a Chinese tractor in quality and components. One consideration I have with a filter or even a screen on the suction side after my research is turbulence in the suction line. This is more prevalent the closer it is to the pump and leads to pump vane and case deterioration, much like boat propellers after many years of use. The other scare for me would be on a cold morning like we had a few weeks ago, -20, and thick fluid being restricted going to the pump causing wear. I want a strait shot to my pump.

I chose to put my filter on the return side and remove my suction side screen after cleaning my sump.

Chris