New Engine break in

[cannarella]

I finally got the new engine replaced in our L4310 HST. After getting everything hooked up, fluids filled, wires connected, and all double checked I fired her up for the first time. She purred like a kitten after getting the fuel bled. My question is about engine break in. The grate motor didn't come with and instructions so I was wondering what Kubota recommends on engine break in procedure. I am really looking on if they want on engine speed variations and such. I know to change the oil after 50hrs according to the maintenance list.

Thanks
Andy

 

[gwdixon]

Lots of information on this subject if you do a search for it. Lots of reading.

 

[TripleR]

As mentioned, there are all kinds of threads on this. Kubota recommends letting it warm up good, not operating at full RPM for the first twenty hours I think and to vary engine speeds. You should be able to do all you need without any problems. I am breaking in an M8540 right now and I stop every once in a while and let it cool down, run it up and down on the RPM scale and of course let the turbo cool down before shutting it off.

 

[cannarella]

Thanks, I wish I had a turbo... Just one on the car.

 

[dex3361]

What happened to the original engine?

 

[kuboman]

Biggest killer of new engines is excessive idling. Let her warm up and cool down but maker her work enough that the combustion temps and pressures are up there. Vary load and speed for a few hours and then work her.
:thumbsup:

 

[cannarella]

Randall, it spun a connecting rod and punched a hole in the side of the block. Long story. Basically one of the oil plugs vibrated out and the engine lost all the oil. Tractor was sitting for a while and we topped off fluids before running its. When the oil light came on it was immediately shutdown. Plug was found and oil was refilled. Ran fine for 30 minutes and then it blew. We were given the tractor knowing that we had to replace the engine.

Thanks Kuboman that seems to be the general consensus. I have to split it Friday to put in the clips that hold the clutch fork to the throwout bearing. They weren't there when we replaced the clutch. sigh. Better do it now then wait...

Andy

 

[dex3361]

That would be such a bad day. I am glad it was a refurb freebie for you.

 

[cannarella]

Well we paid for a new engine but got the tractor for free. So in the end with engine, fluids, filters, orings, ect. it cost us $6000. Oh I didn't mention it belongs to our church and we have a lot to bush hog. We have been borrowing a tractor for a long time and this it such a relief that we don't have to worry about breaking someone elses...

 

[funwithahoe]

As mentioned, there are all kinds of threads on this. Kubota recommends letting it warm up good, not operating at full RPM for the first twenty hours I think and to vary engine speeds. You should be able to do all you need without any problems. I am breaking in an M8540 right now and I stop every once in a while and let it cool down, run it up and down on the RPM scale and of course let the turbo cool down before shutting it off.

Always wondered - Why does the varying of RPM's matter? I respect triple R and am not saying that it doesn't but kinda wondered why it would make a difference??