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#1
02-26-2019, 10:20 PM
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Kohler K241 flywheel puller threaded holes
Can someone please verify the thread size used on the holes in the flywheel meant for the puller to use when removing the flywheel? I'm pretty sure they should be 5/16 NC 18, but I want to make sure before I clean them up. Just purchased a tap and die set (Vermont American 21768) on ebay, So I think I should be covered whatever the thread size is. Thanks.
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#2
02-27-2019, 12:53 PM
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If you are just chasing, cleaning the threads, the tap will turn in very easily. If you're using the wrong tap, it will turn in much harder.
__________________
Richard 1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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#4
02-27-2019, 02:33 PM
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I have one apart on the bench at home, I'm not there now. Somehow 3/8-16 sounds right to me for those threads.
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#5
02-27-2019, 03:26 PM
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I'm sure I have seen both sizes (5/16 NC 18 and 3/8 NC 16) indicated for the flywheel on information posted on the internet. I have the 5/16 bolt(s) and I can't start it with the threads being so rusted. So, I'm guessing 5/16 for this one. Anyway, when I receive the tap and die set I'll just have to proceed with caution. I've never used a tap or a die before, so a new skill for me to develop. One thing I'm sure of is that this new set of tools will come in handy. Thanks for the your input dodge trucker.
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#6
02-27-2019, 07:47 PM
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The taps are "tough" so they last a long time, but if you try to bend them
sideways, they will snap like an icicle, especially 1/4" and smaller. As you turn them, stop after every 1/4 turn and back then off 1/2 turn then proceed till the hole is threaded. This procedure breaks the chip that you are producing and not the tap. Also a tapping oil is recommended, but the least you should use is motor oil, rather than nothing. Special metals require different oil, Cast iron is best lubed with Kerosene. Aluminum and stainless a different oil again. Use the same caution with the dies, and always start a thread straight, not cocked/crooked. If you break a tap most good Hwd stores carry replacements. You can chuck a tap in a drill press if you have one, to get it started straight, but turn it by hand not using the motor. An experienced operator can "power tap" but not for the novice. As taps are easily broken. This should get you started making threads or re threading/chasing threads. Go slow, broken taps are difficult to remove from a valuable part.
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