58 F2B ENGINE T RAKKER E URO 4/5 PRINT603.93. 641 540812 Measuring main journals and crank pins Before grinding the crank pins using a micrometer (1), measure the main journals and the crank pins (2) and decide, on the basis of the undersizing of th e bearings, the final diameter to which the pins are to be ground. Figure 70 Figure 69 MEASURING CRANK PINS 47536 During grinding,pay attention tojournal and crankpins values specified in figures 68 and 69. 47535 MEASURING THE MAIN JOURNALS NOTE NOTE It is advisable to enter the values f ound in a table (Figure 71).
All journals and crank pins must also be ground to the same undersizing class, in order to avoid any alteration to shaft balance. Figure 71 Fill in this table with the measurements of the main journals and the crank pins. MAIN JOURNALS Ш MIN. Ш MAX. Ш MIN. Ш MAX. CRANK PINS 36061 Base q November 2006 Print 603.93.641