Reply To: TM620 – big end bearing undersize

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#201
Keymaster

pls. be advised as follows:

Due to the fact that crankpin damages hardly occur on TM620 engines we do have only one partnumber for a 1mm undersize bearing namely PAAS000131.This bearing has to be used in combination
with a standard bore connecting rod which is 518mm.
If the crankpin has to be machined more than 1mm undersize,the customer has to inform us to what size the crankpin has been machined.The special undersize bearings can then be ordered via
tech id.

If a crankpin is damaged the connecting rod is always damaged as well. Depending upon the severity of the damage the connecting rod should be scrapped.