MAINTENANCE PROCEDURE MAINTENANCE Cooling Fan Belt Tension - Inspect/Adjust 0. Inspection 0. 1. Remove cover (1). The belt should deflect approx. 5 to 6 mm(0.197 to 0.236 in) when pressed with "a" finger force of approx. 58.8 N (6 kgf) at a point midway between the alternator pulley and fan pulley. Adjustment 0. Prepare a pinch bar. Prepare a wooden block. 1. Retract the boom cylinder to the maximum end as illustrated at right. 4-46