Won't go!

Caveman3250 · Feb 9, 2012

Hey any of you guys out there had your Yanmar FX32D just quit going in middle of working? By quit going I mean this: I was doing some grading on our property and was nearly done, no problems, all worked fine, then put transmission in 4th with rpms in medium range and let off of clutch, box blade was up, and it sounded like the engine just started to labor a few rpm then went back to normal....like I had put it in neutral. No response in either gear or shifting the hi/med/low as well. PTO still spins, 3 point still works, engine runs fine, just no power to wheels. BTW, it was in 4 wheel drive at the time. I have a bad feeling that something internal in transmission sheared or something like that! Where would you suggest I start, I have an exploded diagram of entire tractor but it's in Japanese... Thanks

Caveman
Eads TN

winston1 · Feb 9, 2012

Assuming your tractor has differential lock, try engaging it and see if you have anything.

HoyeTractor · Feb 9, 2012

Yep try the diff lock and then there is also a powershift relief valve spring that has been known to fail on some FX models. It just dumps all of the powershift oil before it can build up enough pressure to engage the clutches. Symptoms are similar to what you are describing.

284 International · Feb 9, 2012

Since the PTO functions, it seems like the Powershift circuit is suspect. Somewhere here someone had several posts about, and I think a picture/chart of Powershift troubleshooting information. I would assume it was Winston, but do not recall.

shawnjvl · Feb 9, 2012

Here is the powershift trouble shooting guide. Don't know why I saved it since I have a YM2000

Caveman3250 · Feb 10, 2012

Thanks guys for the responses. I will troubleshoot the flow chart that shawnjvl attached. Only problem, don't know where ports are to check pressures. Any idea? Is there a access plate or plug to attach gauge or is it a internal type of deal? I do have dif lock and tried this, nothing. Thanks for helping!!

Caveman

Eads TN

winston1 · Feb 10, 2012

Here is a drawing of port locations and instructions on a YM226. Ref D on the drawing and you can see one plug on the back and one on the side. I have no idea whether your FX32 is the same or not. I would pay close attention to Aarons mention of the relief valve spring. You can see the ym226 relief valve in the same ref D. Only guessing the ST 1/8 threads mentioned might be British standard threads. Same as used on the oil pressure sending unit. Again, only guessing. Some have screwed in a 1/8" npt fitting at that point. Just one thread per inch difference. Should you be interested here is an adapter. http://www.hoyetractor.com/mm5/merc...re_Code=HTE&Product_Code=OGA-1&Category_Code= The more I look at the drawing it sure looks like a larger plug than 1/8?????

careyo63 · Feb 10, 2012

The FX32 Has a internal Power Shift Pump and so does the 226. If the Relief valve spring isn't Broken and the Valve isn't stuck or sticking. I would be looking hard at the Internal Pump. Blown seal,O-ring or Gasket Or the Dr. Shaft to the Pump.. I couldn't find any pics. Of the pump itself but there has to a way to check the pressure out of it to the valves or Valve Body.

Ah now that makes sence Typo! I believe 22- 4 power shift lever is the Internal Pump. I would start there and make sure it has pressure or the pump is working.

runningbird · Feb 11, 2012

the relief valve spring is quick and easy to check....I would do it first.

Caveman3250 · Feb 11, 2012

Will do the test this weekend I hope, temps have fallen below freezing this weekend so might have to wait till monday.

Thanks guys, I will post results when I get them....

Caveman
Eads TN