Re: More crank bearings

Posted by lee on January 12, 2005 at 15:50:31 from (24.24.95.246):

In Reply to: Re: More crank bearings posted by CNKS on January 12, 2005 at 14:47:03:

Sounds like you will assemble with engine out of tractor and crank case up. Don't put the rear rope seal or any other seals in. This is a mock up to check mains clearance using plastigage. Keep things clean. Clean all the mains bearing saddles. Lightly oil. Place the bearing shells lightly oiled. Place the crank lightly oiled. Place the bearing shells in the caps lightly oiled. Oil the bolts. Bolt the caps on without plastigage and torque to spec to seat the bearing shells. Turn the crank over a little it should be free. Remove the mains caps. Wipe the exposed crank journals and cap bearing surface clean of oil. Use thinner or alcohol to remove all oil. Place the plastigage per instructions on package.
Place the caps and torque to specs. Don't turn the crank. Remove the caps. Check the plastigage clearance. The plastigage will likely stick to surfaces. It doesn't need to be cleaned off completely. It will dissolve in oil. The clearance spec is the total clearance with the crank bottomed in the mains saddles. Lots of guys would just assume the shop did their job correctly but I would do this plastigage check. It's a bit of work but worth knowing you got what you paid for, proper bearing clearance. If this were done from underneath the tractor the crank must be forced up and held up in the saddles.
The same can be done on the rods. Torque the rod bolts carefully so as not to crush the plastigage
artificially.

Follow Ups:

• Re: More crank bearings CNKS 17:30:32 01/12/05 (1)
  • Re: More crank bearings lee 17:59:40 01/12/05 (0)
• Re: More crank bearings lee 17:04:50 01/12/05 (1)
  • Re: More crank bearings CNKS 17:52:58 01/12/05 (0)

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