ym226d hydraulic issues?

[Smoody]

Awhile back I started a thread about acquiring a ym226d...the loader on it has always been a little slow compared to my other yanmars..but since we are getting some morning weather in the 30's these last few weeks I may have a issue...

When I fired her up the other morning..I had to let it run a good 20minutes before the loader would lift..even then raising it was brutally slow...as I continue to run/work it ..it somewhat gets usable but still slow...during the warmup phase the pump sounds like its really loud...I can see the fluid being cold and having to warm for optimal operation but for it not to move an inch for 20 minutes something isn't right..

Pump bad? How to check?

What else would cause this?

 

[kenmac]

Probably have to install a hyd pressure gauge to see how much PSI the pump is making

 

[Smoody]

OK..where do you generally install it at? Can these pumps be rebuilt or only option is to buy new?

 

[kenmac]

installed on an hp port somewhere T etc,.I believe car doc and Winston have installed gauges on their tractors to find out pressure and or relief pressure... From what I have read & understand,They are gears that mess with each other. Much like an oil pump in an auto, Doubt they can be rebuilt

 

[winston1]

Awhile back I started a thread about acquiring a ym226d...the loader on it has always been a little slow compared to my other yanmars..but since we are getting some morning weather in the 30's these last few weeks I may have a issue...

When I fired her up the other morning..I had to let it run a good 20minutes before the loader would lift..even then raising it was brutally slow...as I continue to run/work it ..it somewhat gets usable but still slow...during the warmup phase the pump sounds like its really loud...I can see the fluid being cold and having to warm for optimal operation but for it not to move an inch for 20 minutes something isn't right..

Pump bad? How to check?

What else would cause this?

How fast does the 3 point operate and will it pick up a load?

 

[clemsonfor]

I was thinking the same thing. If its to weak to lift a loader i would not think the 3pt would pick up more than a few hundred pounds?

And as the fluid would warm its lifing ability would decrease as the fluid is thinner i would think. It would flow faster though.

I think you have a restriction or a bad valve from your description. I am not a Hydro expert nor do i have a loader but i understand how they work (basically) and with the same pump supplying oer to the loader as awell as the 3pt you would not be able to lift anything in that period either more than a few hundred pounds.

 

[Smoody]

correct, the 3 point lift is same deal..wont budge until it warms. If you recall it struggled to lift my heavy disc harrow, it surged..but would do it..now that its cold it has to warm atleast 20 minutes...either the pump is weak, or maybe the hydro external filter is restricting? I recently flushed the hydro fluid and cleaned internal screen, did find some metal shaving on the internal screen...maybe hydro pump gears? I would like to confirm its the pump before throwing money at it..

as far as picking up a load...once it warms, it lifts the 3 point implements fine and the bucket has good down pressure and no problems lifting a bucket of gravel, its just slow to lift, always has been..but when cold does not lift at ALL.

 

[winston1]

Stupid question I guess, but you do have transmission/hydraulic fluid in the reservoir? Did you change the spin on filter at the same time you cleaned the screen? Are you confident it is the right spin on filter. I have read from Aaron with Hoye about some that the microns or flow is not large enough and causing your problem. The Yanmar part number for your filter is 194464-48310. Lot of crossovers out there but I sometimes don't have confidence in some of those.

 

[Smoody]

Yes i am using the correct fluid..fluid level in reservoir is ok..no I did not replace the external spin on filter yet, it was put on by the guy I purchased it from, it appeared new, he said it was, so I haven't (I know, shame on me)..I sure hope its that simple. looks like a NAPA filter is on it, but I have no idea if its the proper one..guess the easiest thing to try would be a new spin on.

What is everyone using besides the yanmar filter?


Could it be the loader valve? if yes, would the loader valve affect the 3 point?

 

[J_J]

It may be as simple as changing to a better fluid for the climate.

You say you have the right fluid, but is it right for your climate.

Warm thin fluid is just as bad.

Some of my equipment uses 10W-30 as the hyd fluid.

My Power-Trac is all hyd, even the wheel motors, and has three pumps and uses 10W-30 motor oil.

You do need to check the pressure when cold and when hot, and maybe a flow test to see if the pump is putting out the proper flow.

A very small micron filter may filter crud really fast and then block flow to some degree.

Should have very little back pressure in the system.

With the loader valve in neutral, the flow just passes through it to the other valves.

You should get the same GPM pumped through all valves.

 

[kenmac]

Smooty, I have the same problem when my fluid gets hot. It will hardly lift a bucket of dirt or gravel. I use the recommended fluid. JD 303. I may change to transmission fluid and, see if I get better results

 

[normde2001]

This problem seems to crop up every winter, and the best aolution I have read about over the years, (especially recommended by Tractor Ernie), was to switch to ATF, (Dexron).

 

[clemsonfor]

But the guy lives basically in the Charlotte NC region, this is by no means a clold climate. We did have a few cold nights this last week but it was still in the high 50s or 60s in the day. There should not be a cold related issue...yet!!!

When my ym2000 had a bad valve on the 3pt it was letting fluid bypass it and constantly was running and overheating the fluid and when Hot i was like Kenmac and would loose lifting speed and ability.

But yours it not working till warm so that fix is a non issue?

 

[winston1]

I can't tell any ill effects with my 2002d in 30 degree weather with the traveler or Super tech brand transmission/hydraulic fluid. At 0 degrees might be a different story. Just my opinion.

 

[Smoody]

Yea, sorry for the confusion, I guess 30 degrees isnt cold to some of you guys..ha..chilly here..anyway. I currently have coastal hydro/trans jd303 in it, my other yanmars used same fluid and no issues even in the 20's.

I dunno, i'll change the spin on filter first, then if no better, install a fitting to test the pump pressure.

 

[clemsonfor]

i have used Accell brand, Travelers , and whatever the house brand that Agrisupply carries (all JD303 spec) and none of them are that slow on a 30F morning or 40F for that matter. They are thicker and a bit slower but still will instantly lift a 500lb disk. You dont really notice it though its not that much slower.

The fluid is thick enough to turn the pto with just the fluid friction and current of the gears spinning when cold though without the PTO engaged and NO implement hooked up. So in other words just the pto stub shaft spins just the slightest bit.

 

[deepNdirt]

The fact that you hear the pump making a noise sure sounds like either a restriction or weak pump, You stated you found shavings in the fluid, another thing you said that Leeds me to believe there might have been a problem even back before you own the tractor, Is " it look like a new filter installed, Some people would change it as routine maintenance, But in this case it could have been an effort to troubleshoot a problem, I agree with the others who stated need to check the hydraulic pressure cold/warm before doing anything else, It's evident the pressure is not there,

 

[Smoody]

Could the loader valve be bad? its a cheasy one anyway, i assume factory? its the type that has the lynch pin holding the stick to the control..it dont have a rubber boot etc. I been wanting to replace it anyway, what is a affordable loader valve people use on these yanmars?

 

[deepNdirt]

If I remember correctly you have the Buhler 195, The same as I have, if the control valve is the same, ( a 2 spool valve with single stick ) I haven't had a problem with mine, but you have brought up something to consider looking into, maybe the control needs some adjustment, maybe the valves are not opening all they way,

 

[Smoody]

DeepNdirt, my YM2210 had the Buhler 195, recently sold..now that loader was very responsive, immediate actually..kinda miss it but I needed the 4WD of the YM226 which has a yanmar brand yfl800 loader..I will take a pic of the loader valve, its a crappy design imo.