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Break in??

A

Anonymous-0

Well-known Member
Gonna be picking up my tractor in the next couple of days. New cylinder/piston kits, rod/main bearings, oil pump, and seals...
Kid I am getting it from (that done the overhaul) just says make sure the motor warms up a little then use it as I normally will and not baby it. School teacher told us in class a long time ago to break a vehicle in the way you're gonna use it. But I also hear folks say to baby it awhile.....
What do you folks say??? Also, when should I do the first oil change??

Dave
 
Powertrain engineer friend of mine says you need to take it easy the first few minutes to avoid heat build-up as any sharp edges get worn down. But once the temperature has stabilized, the engine needs to be worked a bit to ensure the rings seat properly. Avoid high speed operation, but make sure it's under load.
 
Instructions with overhaul kits say to allow a few minutes to warm up then can run at any speed and load. Avoid extended idling and heavy lugging. I always run on dyno for about 3 hours for initial break in finishing with 20 min. at full rated hp. Change oil at 100 hrs. Some oil consumption is normal until rings seat. Good luck with your new tractor.
 
A lot of old original tractor manuals suggested using the tractor on a reduced load for the first day or so. Maybe pull an implement one gear lower than normal for instance. Especially important to watch fluid levels closely for the first day or so. Check oil and water often to make sure you don't have any leaks, etc. Just some thoughts.
 
What Mark B said,

The first few minutes, things are running red-hot in that engine as things find their "groove", take off the "roughness" and settle in to thier lube diet. :>)

Parts manufactures say 10-15 minutes, but I'd give it an hour or so of "easy" running, then you should be good to go.

Allan
 
There can be metal particles suspended in the oil after first few hrs operation depending on filter efficiency. How long do you want to run an overhauled engine like that. 5 hrs, 10 hrs, 50 hrs, 100 hrs ? Would spring for oil change & filter after first few hrs operation not over 5 or 10 if was mine.
 
In addition to the above use average grade (cheaper) oil for your first change. This will allow your rings to seat. Do not use synthetic oil for your initial break in.

Keep an eye on your dipstick and change in half or so of the normal interval.
 
My uncles did lots of car,truck,tractor engine rebuilds ALWAYS 30 weight NON-DETERGENT oil for1 00 mile or couple hour break-in
 
All this good and true advice almost makes me feel bad taking a new pulling engine down the track the first time.
 
Non-detergent oil is also used for breaking in aircraft engines. Supposedly it helps to burnish the cylinder walls because detergent oil tends to flush the bits of metal away that would otherwise fill in the hone marks.
 
Use a good quality oil and if it's a diesel, put it to work without lugging it excessively. Varying the load is a good idea and lugging it for short periods is OK. Let it warm up for a few minutes and don't putz around with it or let it idle more than a few minutes. That's the worst thing you can do. Let it idle for a couple minutes (after putting it to work) before you shut it off as well. Change the oil after 50 hours. It's not a bad idea to have the oil analyzed and to cut the filter open to check for metal particles. There will be some metal particles so don't be alarmed. They will clear up with each oil sample. Also make sure there are no intake leaks and the air filter is clean.
 
Yep, back when I was a parts manager at a Case-IH dealer the fresh overhauls always got put on the dyno.

They were broke in "easy" for the the first stage, but would end up going to full rated horsepower after about 30 minutes, back down, and then back up again.

If any problems existed we wanted to find them before it left the shop.

The other comment I will make is to run it the way you plan to use it, but be sure and let it cool down for a couple minutes before you shut it off. Heat shock is hard on a "new" engine. DOUG
 
mercedes benz used to run engines something like hour or two and change oil maybe 20 times or more for break in. Don't know the latest. Dave
 
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