MAINTENANCE 4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH High-Strength Bolt Connections (continued) Check fastening and condition of cab base, illust. Z 21671 Reference No.: Qty. (1) 8 * SW = Wrench size* 371 Bolt size mm Grade SW * mm Tightening torque Nm M36 10.9 55 3100