155d knocking: Yanmar Tractors  -- Other Tractor Brands Discussion Forum and Review 155d knocking: Yanmar Tractors -- Other Tractor Brands Discussion Forum

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 07-08-2008, 23:03 Post: 155182
abouttime



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Location: Rochester, NY
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 155d knocking

I recently bought a 155d with front loader. The tractor starts and run's well and has the power I would expect. My concern is the amount/volume of knocking. I have read past posts and understand the 2 cylinder diesel is known for knocking but haveing never heard one running before I don't know what is normal. The knock in mine is very consistant maybe a little lighter at higher rpm and seems to quiet slighty when warmed up. Can anyone give me an idea of what normal is. Also I plan to install a oil presure gauge, does any one know the proper oil preasure for this engine? I will be ordering manuals soon,I want to get a list of parts and filters together to order at the same time. Any input would be much appreciated.






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 07-08-2008, 23:25 Post: 155183
greg_g



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 155d knocking

I had the slightly larger two cylinder (YM240/24hp) and it sounded very much as you describe. Had it for years, and considered the sound quite normal. They didn't nickname them Yama-Hammers for nothing !!

//greg//






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 07-09-2008, 01:24 Post: 155190
candoarms



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 155d knocking

Abouttime,

There's a discussion board on the net dedicated to Yanmar tractor owners.

Yanmar Owners is a place where owners post information pertaining to every aspect of their engines, transmissions, tires, etc. I've visited the group a few times, and always found it helpful.

I hate to steer you away from this fine group of people, but I see no reason why you couldn't be a member of both groups!

See the link below.

Joel






Link:   Yanmar Owners 

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 07-09-2008, 07:55 Post: 155193
auerbach



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 155d knocking

Yes, that's the nature of a normal 2-cyl Yanmar.

Watch the gauge especially at startup, which is when a pressure problem is most likely, to see that the needle immediately starts climbing. Don't rev up or ask any work from the engine until it reaches normal, about 60 psi.






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Discussion Boards > Active Subjects > Messages as Posted > Yanmar Tractors Forum

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