Leak down

On my 8n when I put it in draft should the lift go all the way down instantly ? Also what are any ideas off hand that could cUse my lift to leak down?[/list]

(quoted from post at 13:57:49 03/25/15) On my 8n when I put it in draft should the lift go all the way down instantly ? Also what are any ideas off hand that could cUse my lift to leak down?[/list]

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When I got my tractor a year ago, the leak-down was way worse than now; in fact, it made a squink noise as it dropped by degrees. No more noise now but it still corrects itself periodically in position control mode. I hauled lots of loads of wood heavy enough to lift the front end but the leak-down didn't increase.

So my two guesses as to why the leakdown lessened:
1. the tractor wasn't getting as much use prior to my buying it.
2. I changed the badly neglected (saturated and robbing from the intake pressure) Donaldson hydraulic filter on the hydraulic intake side of my old vane pump.

I still haven't changed the old fluid yet, but it is on the list for soon and I expect that will improve the action as well.

But I could be dreaming again.

T

Not if your touch control lever is in the up position.
Draft mode is basically all the way up or all the way down.
It doesn't hold in the middle like position control.
Hopefully I'm understanding your question correctly.

If it does not leak down in position control, it should not leak down in draft control either. In draft control the lift is either all the way up or all the way down. no in between.

Check out tip # 16 at the link.

Run the tests & post back w/ results.

And don't spend a lot of time looking for the hydraulic filter.......

Are you planning to moldboard plow with it? If so, sounds like adjustments/repairs are in order. Otherwise, simply don't use the "Draft" position.

It leaks down in position control I had the position control lever all the way up when I moved the lever into draft it instantly went to the ground. But I position control it leaks down and doesn't seem like it will lift heavy implements all the way I'm starting to think blown safety relief valve?

Leaky relief valve, leaky lift cylinder, or a blown gasket would all act about the same.

Could be. Check it out per tip # 16.

So T Tall, what is the filter for? Is that hooked up to a loader. Mine has a filter, but no gauge. I like that. I'll have to look into maybe
installing one.
I must say, you had me to scratching my head first on your above post.

(quoted from post at 22:34:59 03/25/15) Bruce, your link is no longer showing up for me in your posts.
Maybe lost out of your signature?
Not sure if it is for others. If not, here's a link: 75 Tips

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don't see it either Royse strange to see Bruce post without the 75 tips.

(quoted from post at 19:55:08 03/25/15) So T Tall, what is the filter for? Is that hooked up to a loader. Mine has a filter, but no gauge. I like that. I'll have to look into maybe installing one.
I must say, you had me to scratching my head first on your above post.

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Fuddy Duddy,

Sorry I had you scratching your head. I guess I assumed that everyone was familiar with my filter setup from when I joined.

By my first post I was mostly just trying to tell the originator of this thread, that I had leak-down that worried me too but that my leak-down is very minimal now. Then i just wanted to honestly say what changes I had made that may or may not have something to do with my leak-down diminishing. Nothing complicated about my intentions, only what the know-it-all's seem to want to make of them. Some people thrive on trying to make fools of others; behaving as though a ton of mechanical knowledge and experience makes a man wise and a natural leader, while their posturing and belittling tone only indicate a fool.

The filter system is an add on to the hydraulic fluid return to my pump. Someone had put an oil pressure gage on it, rather than the vacuum gage recommended to me by a helpful soul on this forum so I bought one on line and installed it. As you probably know, it lets me know by the amount of vacuum equivalent to negative pressure on the intake flow as the filter element gets saturated. The proper filter, which this is, is set to bypass at much lower pressure than an oil filter.

I'm confident that JMOR and Bruce can find something here to
mock; if not they'll just take something out of context or contrive something . . . you know, like "my posts aren't helpful at all" or whatever. I should be laughing really.

Anyway Fuddy, as you seem to be interested,
The photo below is of the original setup when I bought it, with the totally incorrect gage.

Here's where I bought the correct gage from surplus Center.
Someone here on the forum found it for me. This new replacement gage is for a suction side filter only as you can see. I'd like to see a photo of your hyd filtration.

Vacuum Gage:
http://www.surpluscenter.com/Hydraulics/Hydraulic-Filters/Filters/FILTER-INDICATOR-GAUGE-USE-ON-SUCTION-LINE-ONLY-9-4544-G.axd

I myself don't read every post or come here every day. And my memory is not so great. I may had seen your set up before and forgotten it.
That's a 861? I'm a truck driver so I can't go out and take a picture right now. Here's one I found on my computer while the loader was off
the tractor. Painted in the nice Autumn Brown like most of my tractors?
I'm not sure what most people think, but in a hydraulic system, I don't think you need to change fluid every time you change filters if the
fluid looks good.

When your lift is raised up to the full position, it should not leak down or drop down at all in any mode. Attach a load like a back blade or plow. Raise it all the way up, shut down engine. Observe how long it takes before the load drops down. If all is right, it will stay up for at least a week or two regardless of position control mode or draft control mode. If it drops within 15 minutes to an hour or two, you have a serious cylinder leak issue and/or possibly more. First check the oil level. Is it up where it should be on the dip stick? What color is the oil? Good, clean hydraulic oil should be a clear honey shade. Milky brown indicates water contamination and will require more than juts draining and refilling. Next step is to check the inside for visual issues like leaks and bubbles. Raise lift all the way up, remove side inspection plates, shut off engine and using a flashlight look up into the underside of top cover at the cylinder and see if you see any oil seeping down out of the cylinder. If so, you will need to pull the top cover and replace the piston and possibly the cylinder too if it is all scoured up from the old ring type piston. Replace with the NAA piston that uses the rubber O-Ring. With engine and pump running, look at th base of pump for bubbles. That would indicate a crack in pump and it will need replacing. Basic steps so get going and report back...


[i:654c4848f0][b:654c4848f0]<font size="4">Tim Daley(MI)</font>[/b:654c4848f0][/i:654c4848f0]<table width="100" border="1" cellpadding="0" cellspacing="0" bordercolor="#000000"><tr><td height="25" colspan="2" bgcolor="#CC0000"></td></tr><tr><td></td><td></td></tr></table>

Fuddy Duddy,

You wrote:
"That's a 861?"

I wish!
No, it's a Jubilee.
But if I did get my wish for an 861 Powermaster, I'l put a grey Jubilee grille on it and paint the tank cover grey too!

You wrote:
"I'm a truck driver so I can't go out and take a picture right now. Here's one I found on my computer while the loader was off the tractor."

When I was a school kid, all I wanted to be was a tractor trailer operator. Good photo. Does the filter mount have a tapped port for a filter gage?

You wrote:
"Painted in the nice Autumn Brown like most of my tractors?
I'm not sure what most people think, but in a hydraulic system, I don't think you need to change fluid every time you change filters if the fluid looks good."

At the time I was 6 months into my complete hip replacement and I had just fallen backwards with my landscape rake cracking my right pelvis in two places so I just wanted to get that badly neglected and saturated hydraulic filter with the wrong gage off my to-do list and because my pump was a little noisy. So for a few filter bucks, at least that degree of intake starvation was taken care of while I wrestled with my Hat rim restoration and learned more about the correct oil to buy etc.

I'm goin' for the run-on-sentence trophy.

Cheers,
Terry

Thanks everyone I will check these and post back