Author Topic: 12/2 Main bearing  (Read 4109 times)

its-st

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12/2 Main bearing
« on: November 04, 2010, 07:09:29 PM »
Hi folks,

my Kissan 12/2 came with a splinter of a taper roller in the oil sump.

The engine has no abnormal noise when it's running and the crankshaft play is just a little.
The TRB look ok.

Maybe the splinter came from the dirty oil in the crankcase.

Would you recommend me to change the bearings?

Tom

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Re: 12/2 Main bearing
« Reply #1 on: November 04, 2010, 08:09:28 PM »
I'd see if you can inspect the bearings with out removing them.
Tom
2004 Ashwamegh 6/1 #217 - ST5 just over 3k hours.

its-st

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Re: 12/2 Main bearing
« Reply #2 on: November 04, 2010, 08:27:33 PM »
sry Tom, I don't have superpowers. :D

Is it possible to replace the bearings without removing the crankshaft?

The type of the TRB is 30311, right?

Tom

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Re: 12/2 Main bearing
« Reply #3 on: November 04, 2010, 10:23:10 PM »
Never been in a twin, but in a single you can see the rollers pretty well.
Tom
2004 Ashwamegh 6/1 #217 - ST5 just over 3k hours.

lowspeedlife

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Re: 12/2 Main bearing
« Reply #4 on: November 04, 2010, 11:22:32 PM »
sry Tom, I don't have superpowers. :D

Is it possible to replace the bearings without removing the crankshaft?

The type of the TRB is 30311, right?

Yes but you have to take the flywheels off & then the brg carriers. the center main is a bush bearing so if i were to do it i would remove both flywheels first, then remove & replace the roller brgs one at a time to avoid the possibility of damaging the center bearing from having all the weight of the crank suspended on it alone. once the brg carrier is off you may have to reach thru from inside the crankcase with a brass punch to tap the brg off the crank.


 Scott R.
« Last Edit: November 04, 2010, 11:30:54 PM by lowspeedlife »
Scott R.

5.7 liter diesel k-5 blazer. converting to wvo.
omega 20/2 listeroid