Tappets and Break-in Oil Question

Sapper55 · Apr 22, 2014

I am replacing all the rings on my MH44 K (H260) sometime this week, and need to know:
1. What type of oil do I need to use for break-in and how long do I keep it in the tractor?
2. How fast and how long should I run the motor once it is all assembled?
This is my 1st time doing it. Thank you for any assistance.
Sapper

Anonymous-0 · Apr 23, 2014

Every engine manufacture says adjusting the valves, first 200hrs and every 2000 after. On the instillation oil, I am sure you can get some cam lube for assembly, but STP is a good engine product to use...

David G · Apr 23, 2014

Have you disassembled the engine, if so what shape is the crank?

ecar · Apr 23, 2014

Lucas seems to make a good high zinc break-in additive that you can add to the oil.

44Wheatland · Apr 23, 2014

If you haven't had the block hot tanked and completely cleaned out all of the oil passages do not use a detergent oil. Detergent oil will break loose the built up sludge and can plug the passages.

ASEguy · Apr 25, 2014

Unless the manufacturer requires a different procedure, I use regular engine oil. Pre-lube if you can. Dry starts are hard on bearings. I assume you used assembly lube for the bearings. If you have a new cam, it must be "broken in". Usually that is at a specific RPM. In automotive it's usually around 2,000 RPM for 15-30 minutes. Keep your eyes peeled for leaks, noises anything unusual and be prepared to shut it down. After the initial start-up and run to operating temp, I usually change the oil and filter. Hope this helps. Gerard

rustred · Apr 26, 2014

there is a lot more critical things to know and do before worrying about oil. as you said first time doing it.
you just keep using the same oil as before re-ring job... that's if it is 10-30 is a good break in oil. you run it at a fast idle for at least 1 hr. at operating temp even cover rad if nessesary then retorque the head and re-adjust the valves. then you put it to work under a light load. even throttle back 1/2 speed and then full throttle every so often. this will seat the rings into the cyl's. give it a straight 8 hr. work out if possible.

Sapper55 · Apr 26, 2014

Thanks Rustred, I appreciate the help. Sapper

Sapper55 · Apr 26, 2014

Thanks Ecar.....

Sapper55 · Apr 26, 2014

David, I did not disassemble the engine, I pulled the head and pistons. Had the head reworked though. Thanks for the question. Sapper

Tappets and Break-in Oil Question

Sapper55

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David G

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ecar

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44Wheatland

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Sapper55

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