F3B ENGINE 181 T RAKKER E URO 4/5 PRINT603. 93.641 540812 Measuring the main journals and crankpins Before grinding the journals, use a micrometric gauge (1) to measure the journals of theshaft (2)and establish, on thebasis of the undersizing of the spare bearing shells, towhat diameter it is necessary to reduce the journals. Figure 86 Figure 84 MEASURING THE CRANKPINS 47536 When grinding, pay the utmost attention to the values of the unions of the main journals and of the crankpins given in Figure 82 and Figure 83. 47535 MEASURING THE MAIN JOURNALS NOTE NOTE It is advisable to note the measurements in a table (Figure 85).
All the main journals and crankpins should always be ground to the sameundersizing class so as not toalter the balance of the shaft. Figure 85 Table for noting down the measurements of the main journals and crankpins of the crankshaft. MAIN JOURNALS Minimum Maximum Minimum Maximum CRANKPINS 36061 Print 603.93.641 Base q November2006