Re: Repair Questions for YM 2210
Kevin, Sorry I missed your post.
The YM2210 was perhaps one of the best 22 PTO and 25 engine HP models Yanmar built. The start-up and low RPM knock, known as the “Yanmar Hammer” is typical of this and most other two cylinder diesel engines. You’re going to love the Powershift transmission.
If you follow the large return (suction) line from the pump to the bottom rear of the tractor you will see it bolts from the tube flange to the transmission sump. Undo the two (or three) bolts and you’ll find a stainless fine mesh screen. Clean with carb and choke cleaner, fresh diesel or gasoline. Drain the hydraulic oil first and make sure you have a container that will hold about five gallons.
It is extremely rare for the tachometer and cable to operate and not the hour meter. The hour meter is calculated to operate at variable RPM’s so, the faster the engine speed the more likely you’ll see the hour meter work…and at idle or below 800 RPM’s it may take a full day to see any movement whatsoever.
The engine temp gauge sender may be grounding out or loose wire. You may want to check pulley belt tension and fuse holder block for corroded contacts too.
Like Mickey said, your gauge may indicate a battery water sensor and it’s commonly confused with the charging light. I agree with his recommendation with Ernie.
Hopefully you’ll come back and let us know how everything works out with the tractor.