Creepy loader

[Rail9222]

Hi guys
I have an issue with my YM240 and hope you all might point me in the right direction. I made a short vid that shows what is going on.

Crap...it wont let me post links.

Any constructive advise is appreciated.

Thanks

 

[Rail9222]

Hi guys
I have an issue with my YM240 and hope you all might point me in the right direction. I made a short vid that shows what is going on.

Crap...it wont let me post links.

Any constructive advise is appreciated.

Thanks

 

[Rail9222]

Hi guys
I have an issue with my YM240 and hope you all might point me in the right direction. I made a short vid that shows what is going on.

Crap...it wont let me post links.

Any constructive advise is appreciated.

Thanks :thumbsup:

 

[Rail9222]

YM240 - YouTube

 

[Rail9222]

All loader cyls have been rebuilt. New screen in the system. Also new pump. The 3 point does bleed down when it's shut off but it takes a while. I haven't messed with the 3 point valve. I was hoping it could be an adjustment.

 

[California]

'They all do that.' Well most of them after they've been in service 40 years. I think it's fluid getting pushed past the 3-point cylinder's piston ring, by the weight of the rear implement. Or possibly past the 3-point control valve.

On my YM240 I normally have a backhoe mounted that is the maximum weight the 3-point can lift. If I keep it lifted it causes back pressure, and the loader gradually rising in float position, like you described.

With the loader valves at mid position (not float) and as the backhoe gradually moves down over several minutes, I can see pressure rising on a gauge I have ahead of the loader valve input.

I replaced my loader valve because it dribbled. That didn't make any difference in the loader-rising issue, so I don't think the problem is related to the loader valve. Float should allow fluid to flow back to the sump but the pressure from the falling implement seems to block this.

I decided to just live with it, it isn't hard to avoid using float when I don't need it.

 

[Rail9222]

Thanks for the reply. Would be nice to have this function work as designed but I think your right and I need to live with it.

 

[careyo63]

One thing That I see may help and Cali's right. My Ym2000 is the same 3pt. setup but no loader and I'm not there. But look over at your lift handle and make sure it's all the way forwards/Down position. And then I noticed that the spring to the 3Pt. looks to have Tension on it which is applying pressure to your 3Pt. control valve. You have a Lift handle Lock/Stop and it may not letting it go all the way down. So if that's correct remove it. Then The spring to the 3pt. valve may have a lot of pressure on it still causing the 3pt. to try and raise at all times. So basically Lift handle all the way forwards/Down position. No lock preventing that and no spring pressure. But you may want to set the spring start pressure as you raise the handle. I had to set mine like that but again no loader on the Yanmar. Just a guess that may help. Oh make sure the 3pt lock between your legs is open all the way also. the flat knob in the Pic.:2cents:

 

[rScotty]

I'm confused....are you concerned with the 3pt creeping down or with the FEL arms creeping down? How are your hydraulics hooked up? Does the same pump drive both 3pt and FEL simultaneously? Some do...and some have a separate FEL pump and reservoir.

I ask because most older tractors will creep down, but it takes an hour or more for most to do that. It isn't something you can watch in a 5 minute video. I don't mind either end creeping down if they do it slowly because like I said....old tractors do that. But I do expect them to stay up for an hour or so when I'm doing chores.

You have that knob that will lock the 3pt hitch. Is it working?? It should hold up just about indefinitely when the knob is closed. If not, its probably the 3pt cylinder/piston/rings. Easy to fix on a Yanmar.

On the other hand it it is the FEL And if you need the front bucket to stay up - and the cylinders are rebuilt good as you say - then I would guess you could just put a similar on/off valve in the loader hydraulic line. I've never actually done that, but it ought to work.

What one usually does if the FEL loader still drops after a cylinder rebuild is to replace the loaders directional valve block complete. Surplus Hydraulics has them for a few hundred bucks.
rScotty

 

[California]

I think he's talking about back pressure from the implement falling, pushing the loader up, if the loader was left in float position. My YM240 does that.