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| Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum |
Top dead center/ timing tape
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Cleon Couey
02-22-2021 15:24:12
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Putting the 283/310 back together on my 1655 diesel. I need to install a new timing tape on the flywheel. How can I determine top dead center when the head and pistons are not yet installed?
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J.Wondergem
02-23-2021 16:26:06
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Re: Top dead center/ timing tape in reply to Cleon Couey, 02-22-2021 15:24:12
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Quoting Removed, click Modern View to see
I missed the without pistons. Sorry.
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matthies
02-22-2021 17:34:10
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Re: Top dead center/ timing tape in reply to Cleon Couey, 02-22-2021 15:24:12
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Boys he is asking this since he doesn't have the pistons installed !!
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Dieseltech
02-22-2021 17:53:30
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Re: Top dead center/ timing tape in reply to matthies, 02-22-2021 17:34:10
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I saw that, but if he wants it right a piston/rod needs to be in place..
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J.Wondergem
02-22-2021 17:03:50
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Re: Top dead center/ timing tape in reply to Cleon Couey, 02-22-2021 15:24:12
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You can put a stick in the number one spark plug hole and roll the motor over until the piston touches the stick. Make sure to mark your fly wheel at the pointer in the hole and mark your stick. then roll the motor. backwards until it touches the stick again and mark your flywheel again. Now measure the two marks on the flywheel find the halfway between the two marks. that will be TDC.
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Dieseltech
02-22-2021 17:00:18
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Re: Top dead center/ timing tape in reply to Cleon Couey, 02-22-2021 15:24:12
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I bolt a steel bar across the number one piston, then place a large nut on piston top. Now turn the crank either direction until the piston stops against the steel bar and nut, then mark the flywheel with a PENCIL at the block pointer. Now turn crankshaft opposite direction until piston stops again, and mark flywheel. Now SPLIT the difference, the CENTER between the two marks is TDC.
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Gary Mitchell
02-23-2021 09:33:10
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Re: Top dead center/ timing tape in reply to Dieseltech, 02-22-2021 17:00:18
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ziffel
02-23-2021 03:02:58
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Re: Top dead center/ timing tape in reply to Dieseltech, 02-22-2021 17:00:18
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Use a degree wheel on the front pulley. Much more accurate.
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dnd
02-23-2021 04:29:08
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Re: Top dead center/ timing tape in reply to ziffel, 02-23-2021 03:02:58
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Its been awhile since I did this, but the last time I had an engine apart I thought I remembered that the key way on the crank pulley was always at 12 o,clock
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