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#1
02-18-2017, 05:36 PM
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Size matters ---
Bigger is always better right? Thought you guys might get a kick out of a size comparison between the piston and wrist pin from a 14 hp Kohler K321 and the same from a 400 hp Cummins NTA-400 diesel. The Kohler is 3.5" bore, the 400 is 5.5" bore. I have the Cummins in the shop doing a complete overhaul and the Kohler parts were nearby. All that shiny aluminum makes for a nice six pack!
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149, 2072, Original, 1772, 1782, #1 cart, Parker 48" sweeper, 
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#2
02-18-2017, 05:55 PM
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 Nice, the big wrist pin looks heavy !!!!!
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102-P Narrow tires no creeper--42inch deck and IH blade. 102-D Wide tires,creeper,headlights--42inch deck and CW36 snow thrower. 1997-2086 Super with 3 point hitch and all the bells and whistles. 1961-PTE-"O", needs lots of work. 2072-Repowered with a ch18, Woods tractor. 149 with my Dad. 44" deck and QA36A. #9-70 with weights and sleeve hitch. #10-149 with a 38inch deck. 2015 Kubota BX 2670.
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#3
02-18-2017, 06:26 PM
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Yeah, it is. It is a solid billet of hardened steel and weighs about 3 pounds!
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149, 2072, Original, 1772, 1782, #1 cart, Parker 48" sweeper,
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#4
02-18-2017, 09:12 PM
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Quote:
Compression comparison Kohler K321 ( flathead , gas) K321/M14 (14hp) - 6.6:1, 7:1 or 9:1 (depending which head is used) Cummins NTA-400 diesel ( turbo charged diesel ) 13.9:1 That's why the big difference in wrist pin weight. Much more torque with a diesel than a flathead gas engine.
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#5
02-18-2017, 10:21 PM
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Did you ever see the metal lathe made out of those pistons?
Some guy sells a book detailing how to do it. I think he has a drill press, and milling machine, also,, all made with the piston. The wrist pin hole holds the bearings for the machines shaft,,,
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#6
02-18-2017, 10:54 PM
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That would be an interesting read.
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149, 2072, Original, 1772, 1782, #1 cart, Parker 48" sweeper,
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