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Tractor Talk Discussion Forum

break in secrets

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mattd

02-11-2005 16:13:42




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i found this article on engine break-in a while back. it is very interesting, but long. i wish i had read it before i bought a new truck, i would have done it this way. i though you guys would enjoy it.

matt




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buickanddeere

02-12-2005 10:17:58




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 Re: break in secrets in reply to mattd, 02-11-2005 16:13:42  
Load her down to about 80% of max rated where they are supposed to run, not a steady 101%. Vary the load and rpms some. Get the coolant up to full temp, 195F. I like to change to oil after about the 1st good run to get the sand, shavings and dirt out asap.



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dr.sportster

02-12-2005 07:16:05




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 Re: break in secrets in reply to mattd, 02-11-2005 16:13:42  
Matt I just read over that site breifly.I disagree with the principle of his method.It is speaking about jap bikes.These motors have way less piston speed than motors I rebuild.Dyno break in or hard run break in may be suitable for tractors also but if you run in a long stoke motor with high to excessive piston speeds you will ruin the rings.I too have disassembled motors for inspection to satisfy my own curiosity.He is not really showing enough data other than the picture of the one honda piston which could have the brown mark for several other reasons.I might subcribe to his magazine but I will break in my motors per instructions of the speed equipment I install.However he might still be correct for motors with normal piston speeds.also he states this is possible due to modern machining methods.The way Im building a motor is the same for years.What modern machining other than a finer cross hatch pattern is he talking about.I believe his break in may be right for those short stroke hondas just not for all type motors.Good info anyhow.I will be glad to discuss this further as there are many factors that affect the sealing of the piston rings.

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dr.sportster

02-12-2005 07:35:07




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 Re: break in secrets in reply to dr.sportster, 02-12-2005 07:16:05  
Matt, I will never figure out how to open the email thing in the corner.Heres my email if anyone wants to discuss ring sealing.Also that sentence I wrote I disagree with the principle of his method,Well I dont even know what that means.Trying to sound knowledgable by speaking BS. please_be_nice@att.net Wifes E mail.[ITS her computer]



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dr.sportster

02-12-2005 14:11:54




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 Re: break in secrets in reply to dr.sportster, 02-12-2005 07:35:07  
I will not go into further detail here but it is a motorcycle issue not a tractor issue.You probably broke your truck in correctly if you listened to the manufacturer.I making a chart on Harley -Davidson piston speeds that should be ready tommorow if any body cares.It is in feet per minute of piston travel for various RPM.PS=strokexRPM/6 At stock stroke it is excessive when you add stroker fkywheels it surpases normal engineering recomendations.So in the first fifty miles for the rings ,RPM gets very critical.

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dr.sportster

02-13-2005 06:15:36




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 Re: break in secrets in reply to dr.sportster, 02-12-2005 14:11:54  
Dat boy gonna blow up dem fancy japoneez motorsickles.



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Roy in UK

02-11-2005 23:15:15




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 Re: break in secrets in reply to mattd, 02-11-2005 16:13:42  
The first thing we did when our new MF 1100 arrived was to set it to work on a 5X14" plow in medium strong land, 3rd low high multipower. Between 1969 and 1996 all we ever had to do to that engine was fit a new rocker cover gasket. When we took delivery of our 78hp Renault the guy that brought it said to me "Put your chisel plow on her now NOT your chain harrows!" (advice promptly taken) that engine never missed a beat in the 13 years we had it anyway.

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marlowe

02-11-2005 19:01:32




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 Re: break in secrets in reply to mattd, 02-11-2005 16:13:42  
you can say it's wrong but i run them like i stole it fast and use it hard. i race stock cars and we run new engines at 8000 right out of the shop and never have had one blow well thats not yet but one might. i just don'e belive in babying any engine



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dirttracker

02-16-2005 06:35:59




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 Re: break in secrets in reply to marlowe, 02-11-2005 19:01:32  
You've never had one blow, why the new engines then ?



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Davis In SC

02-11-2005 19:18:39




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 Re: break in secrets in reply to marlowe, 02-11-2005 19:01:32  
That link was interesting reading... Still, I wonder if running hard from the start is best.. ? Shop down the road builds racing engines, they put them on the Dyno, warm them up, & max them out in short bursts, allowing them to cool a few minutes between hi-RPM runs. But, then again, race engines & superbike motors are not expected to run 10,000 hours. IMHO, any mechanical device benefits from a gradually increasing load.

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Jon H

02-11-2005 20:27:43




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 Re: break in secrets in reply to Davis In SC, 02-11-2005 19:18:39  
Several ring manufactures agree totally with run them hard as soon as possible to get enough cylinder pressure to seat the rings, but no excessive rpm. I believe one company said with a manual trans to go from 30-60 in high gear at full throttle somthing like 20 times,then drive the engine like you normally would with no long runs at a constant speed. No baby treatment. I had one tractor with an L10 Cummins that I ran on a light load for the first 30 or so hours,the thing was an oil hog and must have had a lot of ring blow by as the oil got black very fast. Cummins replaced sleeve/piston/rings assy and told us to pull the heck out of it as soon as the water temp hit normal. We did that and had much better luck the second time.

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steveormary

02-11-2005 21:12:09




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 Re: break in secrets in reply to Jon H, 02-11-2005 20:27:43  
Broke in several tractor and car engines. Some new and some overhauled. Broke in the Super M on a 3 bottom plowing alfalfa ground.

TE-20Ferguson was broke in cutting stalks. Decided 3rd was too slow so pu it in 4th. Lugged it some going uphill. Well,that turned out ok too as it would lug down on a hard pull and keep on going.
steveormary



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