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Tractor Talk Discussion Forum

Breakin oil

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fixerupper

03-23-2005 06:33:31




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This has probably been posted before and I missed it, but what makes break-in oil different from other oils?




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James2

03-23-2005 09:25:59




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 Re: Breakin oil in reply to fixerupper, 03-23-2005 06:33:31  
Actual breakin oil doesn't have the over abundance of anti-additives, that standard diesel oil contains. This allows the cylinder wall/rings to seat quicker and avoids having the cylinder liners glaze. I believe one can use regular oil if the machine/engine is loaded quickly after the initial start. I got into a real pickle when rebuilding the JD830 using an initial fill with standard 15W40 JD oil. It was late in the year and didn't get a chance to load the tractor up until late spring . In the interm, I continued to start the tractor and run occasionally to keep it lubed up. Big mistake, the cylinder walls glazed and I had one heck of a time getting the rings to seat. In contrast, the JD 730 was rebuilt, filled with standard JD oil and immediately put to work on an 18 ft disk. Worked out beautifully. Due to the experience with the JD830, the last engine rebuild (MM950G) JD break-in oil was used in the initial fill. Replaced at 5 hrs with regular JD oil and new filter. If you are assured the engine can be quickly loaded, I would go with standard oil, because I believe initial breakin wear will be slightly less. Otherwise I would not chance it.

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dhermesc

03-23-2005 14:06:35




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 Re: Breakin oil in reply to James2, 03-23-2005 09:25:59  
Did John Deere actually refer to it as "break in" oil or was it just a lighter weight? Dad-in-law ran into the same problem with a D17 as you did on your 830. Ended up letting it run for a while with Chem12 added to the crankcase oil to break up the glaze - soldiers on to this day.

We used to use 5W30 to break in overhauled engines, now we just don't bother, and change the oil after a couple days, hard use. A new engine doesn't really need "break in", manufacturing process results in much tighter tolerances and new alloys don't allow for much wear.

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James2

03-23-2005 18:37:30




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 Re: Breakin oil in reply to dhermesc, 03-23-2005 14:06:35  
As 720Deere answered, it is called Break-in oil and as I remember it was lighter weight then 15W40, although don't take that to the bank. I've still got two gallons and need to look. I have a question, what is Chem12? Some type of solvent?



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dhermesc

03-24-2005 06:43:36




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 Re: Breakin oil in reply to James2, 03-23-2005 18:37:30  
Chem12 is a solvent - used to clean up fuel lines and as an engine flush. It's at most Walmarts, comes in a round tin can with a screw on lid, similar to Seafoam.



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720Deere

03-23-2005 14:50:22




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 Re: Breakin oil in reply to dhermesc, 03-23-2005 14:06:35  
It is actually called "John Deere Break-In Oil".



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Allan in NE

03-23-2005 06:57:30




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 Re: Breakin oil in reply to fixerupper, 03-23-2005 06:33:31  
Hi Fix,

It is just in the way you use the oil; it isn't a "special" oil per se.

It is only used for just a short time and then ya dump it to "flush" any contaminants left over from the rebuilding process and initial engine break in period out of the engine.

HTH,

Allan



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