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D21

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Dan Gietl

03-11-1999 18:14:47

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Has anyone taken the crank shaft out of a D21. Do you have to take the motor out.Can you bring it out the bottom. Thank You for your help . Dan

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MADDOG

10-30-2002 12:56:58

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Re: D21 in reply to Dan Gietl, 03-11-1999 18:14:47

Please guys, DON"T EVEN THINK about dropping the
"cranks" down on these big diesels. So many guys will rebuild the bottom end by taking off one or more main bearing cap (and bearing) and then
the NEXT adjacent one to it so that they can slip/drive/bend the NEW MAIN bearing halves ito place. What they don't realize is that they've
OVERSTRESSED the Crank in the process, and probably induced VERY TINY stress fractures into the crank. Remember a crankshaft is an EXTREMELY
BRITTLE piece of metal; they don't make NEW cranks
for these old pullers. I've had to TRASH tractor/
dozer d/engines because the crankshaft did NOT pass the NDI (florescent dye) inspection. When you
build 150-300 (PTO) horsepower turbocharged engine
like I do (out of 70-125 HP stockers) the first THING I INSPECT is the Crank. PULL THE ENGINE
AND TURN IT UPSIDE DOWN TO REMOVE THE CRANK with a hoist!!!

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Craig

03-11-1999 19:04:35

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Re: D21 in reply to Dan Gietl, 03-11-1999 18:14:47

Dan you have to pull the motor. The flywheel and back plate that holds the rear seal has to be removed. On the front you need to take off the balancer timing cover and adapter plate between block and timing cover.

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