rScotty
Super Member
- Joined
- Apr 21, 2001
- Messages
- 8,258
- Location
- Rural mountains - Colorado
- Tractor
- Kubota M59, JD530, JD310SG. Restoring Yanmar YM165D
It popped right off. Thanks!
Couple other questions...
Is it bad to let the boom bleed down when parked? Assuming the bucket isn't rusting in a puddle, is it necessary to lock the boom after use?
Is it better to run the engine at low or high RPM for light backhoe use? Like is it better for the life of the hydraulics to run at a certain speed or does it not matter and it's more about responsiveness vs fuel consumption?
Glad to hear that worked for your boom lock. That's what I do on mine: pull the lever to move the boom back and release the boom lock at the same time. A smear of grease on the boom latch worked wonders too.
Don't know the answer to whether it is bad to let the boom bleed down. But the whole reason why something leaks down means that hydraulic fluid is seeping from one area to another. That may not be bad, but certainly can't be good. So why would you want to do that instead of locking the boom? It's surely not bad to lock it.
Uh.... on engine RPM. I confess that I like to do backhoe work with the motor only turning at a fast idle. The M59 backhoe power even at idle is awesome, and I prefer the smooth way the controls work at low to medium RPM.
To your question, of course everyone knows the principle that mechanical wear goes up with RPM just like hydraulic wear goes up with higher flow. There are counter arguments too, but I've always been a believer that on balance, lower rpm reduces wear on any engine.
But there is one area where the M59 might be part of a motor group that are the exception to the wear argument. The M59 motor was designed in an era when the Interim Tier IV pollution regulations were in effect - roughly the era 2007 to 2015. Many manufacturers - including Kubota - met those regulations with a combination of injection timing and EGR valving in a way that sometimes can create heavy sooty black exhaust on startup, low rpm, and when gunning the engine. It's not just the M59s & other Kubotas, it's the way a lot of engines from that era were designed.
If your Tier IV engine does those things - i.e. makes heavy black soot when changing speed - then I am coming to believe that prolonged low RPM use will lead to carbon buildup in those engines.
It's not a fatal flaw - and even if carbon build up happens it may not lead to anything bad. But it is a reason to run those particular engines at higher RPM for at least part of the time.
Luck,
rScotty