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Breaking in a New Engine

super99

super99

Well-known Member
My Oliver 550 was stuck when I bought it, got it running now. One new sleeve, new Hasting rings and valve job. I have ran it for about 1 1/2 hours, no load, varying engine speed. I really don't have anything to put a load on it with, any suggestions on getting the rings to set? Not in a hurry to do it, about the only thing I can do to put a load on it is mow the roadsides in a few weeks Thanks, Chris
 
I would let it sit till you can work it.

Put a PTO generator on it if you have one and let it run.
 
Give it a couple hours like your doing then run it like you rented it from the guy who broke your daughter's heart.
 
Not a lot you can do as far as running it.

Probably the main thing is not to let it spend a lot of time idling.

You do want to be sure it has a hot thermostat, that it is properly tuned if gas, the pump is right if diesel.

Leave the break in oil in as if it were a regular oil change interval.

Most ring problems are a result of the cylinders out of tolerance or the ring lands are worn. Trying to put hard rings on an old bore often causes problems. Obviously break in procedures will do nothing for that.

Just hope for the best, chances are it will be fine.
 
With a second person, pull your truck around dragging the brakes. You won't put many miles on your brakes for the couple miles you drag it around at 4 mph.

We do this to load test some of my tractors down my 1/2 mile road. By the way, on my 2012 Chevy Silverado, just replaced the original front pads & disks at 121,000 miles !
 

May have glazed the bores with 1-1/2 hours of running time at low temps and no load.
As others have stated, make her work. Work but not a lot of lugging .
 
You will know if the cylinders are glazed. The exhaust will start slobbering (wet stacking). Black sugary like exhaust fluid.

They are correct in that the engine needs to be run under load. Either bush hog or drag a harrow for several hours.
 

Dad used to out a bush hog on it, back it into a creek so the blades were under water, rev it up and let her run.
 
(quoted from post at 21:50:27 05/27/20)
Dad used to out a bush hog on it, back it into a creek so the blades were under water, rev it up and let her run.
Click to expand...


1948Case, That sounds like a good method. Like a baker's fan.
 
This applies more to engines for the road in trucks or cars but the idea makes sense to me. You leave it in high gear and from 20-25 mph accelerate hard up to 60 or 70, then take your foot off the gas and let it run down to 20-25 again, do this 10 or 12 times and consider it broken in, but I would still vary the load and not run at full load/speed for long for a while yet. The idea is this works the parts so they wear in, then allows they to cool while sucking a little oil up to the rings to lube them while breaking in. I guess with a tractor you could do it by driving up and down a fairly steep hill that took you 15 or 20 seconds to go up, turn around and go down and so on.
 
I'd say don't be afraid to work it. Don't overwork it, but don't baby it, either.
 
Better read up on what the maker of the piston rings wants and do exactly that . Trouble is if you have a new cam break in varies.
 
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