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Cylinder boring.

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Kurt Braun

04-21-1999 06:06:26




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I am interested in boring my 48 cub, however I do not want to split the tractor to take the engine out. Is there such a thing as a portable boring machine that will bolt on the block while the engine is still on the tractor? If so who can do it or where can I rent a machine or buy a used one? Any comments would help. Thanks Kurt Braun




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BillBlackler

08-28-2000 20:16:36




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 Re: Cylinder boring. in reply to Kurt Braun, 04-21-1999 06:06:26  
Kurt:
I have a Van Norman portable boring bar and provide portable boring service to various diesel repair shops in Oregon and Washington.
I mostly bore Detroit Diesel 71 series for over size sleeves. This boring bar has a vacuum atachment that will remove 95% ( or better )of the chips while in operation.
As a result I can bore an engine in place, with the crank still in it and have a minimal amount of debris left over for the technician to clean up.
The sizes this machine is capable of boring is 2.60 to 5.343.
In many marine applications it is less expensive to pay my time to come out and bore in place, than to tear the boat or whatever the engine is mounted in apart to remove the block from the boat.
Keep in mind you will have to hone the cylinder to remove the tool bit marks after the boring process, so you will be dealing with some potential contamination in the crank case from doing this. Typicly .0015 is all you will need to hone out. If you are interested, Get back to me.
I can provide references.
Best Regards
Bill

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Tom Gardner

07-24-2002 08:39:01




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 Re: Re: Cylinder boring. in reply to BillBlackler, 08-28-2000 20:16:36  
Hi Bill,

I am posting for a friend who purchased a Van Norman Per-Fect-O Model 944s boring bar. He picked this machine up at auction without manuals. Would you have any idea where he could get the books for this machine?
Thanks Tom (Brighton Mich)



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Don

12-19-2002 14:07:00




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 Re: Re: Re: Cylinder boring. in reply to Tom Gardner, 07-24-2002 08:39:01  
Yes I have a 944s Bar manual I dont want to get rid of it but I could copy it for you.



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Jim

04-21-1999 11:09:33




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 Re: Cylinder boring. in reply to Kurt Braun, 04-21-1999 06:06:26  
It could be done, but I would take the engine all apart because you will get over a cup or more fileings all over the crank,cam,etc.And that will be hard to clean up.



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Matt Isserstedt

04-25-1999 10:30:11




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 Re: Re: Cylinder boring. in reply to Jim, 04-21-1999 11:09:33  
I definitely have to agree with Kurt. The other consideration is this: How do you intend to get the crankshaft out of the cylinder block without splitting the tractor?



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james

03-20-2000 09:32:52




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 Re: Re: Re: Cylinder boring. in reply to Matt Isserstedt, 04-25-1999 10:30:11  
lisle makes a portable solid borer. it costs about $150and uses a standard 1/2 inch drill. I've bored a few motors without pulling the motor, but you have to take the crank out. When it is finished clean the block really well and wipe the cylinders with oil and a rag to take out the abrasive stone particles. This is how most companys(including the gov.) hone out big cylinders(like hydralic piston cylinders).

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