C r a n k s h a f t (1) has six connecting rod journals. They
a r e numbered one to six, counting from front to rear.
U s i n g micrometer, measure diameter of number one connecting rod journal (2).
T a k e measurements as close to front and rear ends of connecting rod journal
a s p o s s i b l e . N o t e measurement.
T u r n micrometer 1/4 turn around number one connecting rod journal (2).
D o step 1 again with micrometer in this new position. Note measurement.
Subtract the smaller of the two measurements taken in steps 1 and 2 from the
l a r g e r of two measurements. I f difference is more than 0.0010 inch, journal
( 2 ) is out of round. G e t a new crankshaft (1).
Note the smallest of the four measurements taken in steps 1 and 2 and the
n u m b e r of connecting rod journal (2) it was taken on.
D o steps 1 through 3 again for other five connecting rod journals
( 3 through 7).
GO TO FRAME 26