Technician A says that if one main bearing journal is ground to the next undersize, all of the other main bearing journals must be cut to match. Technician B says that if a main bearing journal is worn below the limits of machining, an alternative may be welding up the journal and then grinding it back down to its original size. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Both technicians are correct. Technician A is correct because for uniformity and balance, all main bearing journals should be machined to the same size if one is altered. Technician B is correct because welding up a worn journal and then machining it back to its original size is a viable repair method when a journal is too worn for standard machining.

Technician a Says That If One Main Bearing Journal Is