184 F3B ENGINE T RAKKER E URO 4/5 DEFINING THE CLASS OF DIAMETER OF THE MAIN JOURNALS AND CRANKPINS (journals with nominal diameter) Three sets of numbers are marked on the crankshaft in the position shown by the arrow (Figure 89 at top): - The first number, of five digits, is the part number of the shaft. - Under this number, on the left, a set of six digits refers to the crankpins and is preceded by a single digit showing the status of the journals (1 = STD, 2 = -0.127), the other six digits, taken singly, give the class of diameter of each of the crankpins they refer to (Figure 89 at top).
- The set of seven digits, on the right, refers to the main journals and is preceded by a single digit: the single digit shows the status of the journals (1 = STD, 2 = -0.127), the other seven digits, taken singly, give the class of diameter of each of the main journals they refer to (Figure 89 at bottom). Figure 89 89.970 to 89.979 89.980 to 89.989 89.990 to 90.000 CLASS MAIN JOURNALS NOMINAL DIAMETER 99.970 to 99.979 99.980 to 99.989 MAIN JOURNALS 99.990 to 100.000 Base q November2006 Print 603.93.641 CLASS CRANKPIN NOMINAL DIAMETER