WEICHAI & PSI SERVICE MANUALS AVAILABLE ONLINE AT FLYPARTSGUY.COM Weichai America Corp. 13 APPENDIX A Appendix A: Torsional Torque and Tightening Method for Main Bolts and Nuts Revision:
August 2019 78 GET YOUR WEICHAI & AFTERMARKET SERVICE PARTS AT FLYPARTSGUY.COM Bolts Bolts Specification Tightening torque(N·m) Inspect value (N·m) Intake manifold bolt M10 45～50 40～60 Exhaust manifold bolt M10 45～50 45～60 Flywheel bolt M16-10.9 285～295 285～340 Fastening bolt of crankshaft pulley M16-12.9 300～310 300～360 Damper fastening bolt M10-10.9 65～70 65～80 Camshaft gear bolt M10×1.25-12.9 85～90 85～110 Bolt of Intermediate Gear Shaft M10 65～70 65～80 Fastening Nut of Injection Pump Driving Gear M10-10.9 65～70 65～80 Nuts of Injection Pump Shaft M14×1.5 85～100 85～110 M18×1.5 100～110 100～120 Hexagon bolts and stud of flywheel M12-12.9 140～145 140～170 M10-12.9 80～85 80～95 Bolts of Oil Pan Socket head screws of oil pan M8-8.8 20～25 20～35 M8-10.9 30～35 30～45 Bolts of Oil Pump Stud with self-locking nuts M8-12.9 30～40 30～50 M8-8.8 20～25 20～35 Bolt of Rocker-Arm Seat M10-8.8 40～45 40～55 Rocker adjusting nut M9×1 20～25 20～35 Fastening bolt of cylinder head cover M8-8.8 10～15 10～25 Fastening bolt of pulley on hub M10-10.9 65～70 65～80