Crankshaft
曲轴将气缸中的燃烧力转变为有效旋转力矩。 曲轴前端使用减振器来减轻会对发动机造成损坏的扭振（扭曲）。
曲轴驱动位于发动机前端和后端的一组齿轮。 发动机前端的齿轮组驱动机油泵、水套水泵、燃油输油泵和附属驱动装置。
后齿轮总成驱动凸轮轴和附属驱动装置。
曲轴两端使用了油封和耐磨套筒。 3508 曲轴由五个主轴承固定在位。 3512 曲轴由七个主轴承固定在位。 3516 曲轴由九个主轴承固定在位。 中央主轴承两侧的止推板控制曲轴的端隙。
Caterpillar Information System:
3126B and 3126E On-highway Engines Camshaft - Install
3408E and 3412E Engines for Caterpillar Built Machines CID 0190 FMI 03 Engine Speed open/short to + batt
Uninterruptible Power Supply (UPS) 250 Fuse - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines CID 0175 FMI 04 Engine Oil Temperature short to ground
3408E and 3412E Engines for Caterpillar Built Machines CID 0175 FMI 03 Engine Oil Temperature open/short to +batt
3456 Engine, 836G Landfill Compactor, 834G Wheel Dozer and 988G Wheel Loader CID 0174 FMI 04 Fuel Temperature short to ground
3114, 3116 and 3126 MUI Engine Governors Throttle Lever (Types IV, V, VI, VII, and Some III) - Install
Uninterruptible Power Supply (UPS) 250 Contactor - Remove and Install
UPS 250, UPS 300, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supply Flywheel Inverter Module - Remove and Install
2000/02/01 New Oil Filter Base Group {1306}
723PLUS Digital Speed Control Accessories
3176C and 3196 Engines for Caterpillar Built Machines CID 0168 FMI 00 System Voltage High
3500B and 3500B High Displacement Generator Set Engines Camshaft
3516B Generator Set Engines with Dynamic Gas Blending Electrical System Operation
3456 Engine, 836G Landfill Compactor, 834G Wheel Dozer and 988G Wheel Loader CID 0190 FMI 02 Loss of Engine Speed Signal
723PLUS Digital Speed Control Electrostatic Discharge Awareness
3408E and 3412E Engines for Caterpillar Built Machines CID 0190 FMI 07 Primary Speed Sensor misinstalled
3408E and 3412E Engines for Caterpillar Built Machines CID 0190 FMI 08 Engine Speed signal abnormal
2000/01/01 Disassembly And Assembly Of Main Bearings For Journals Without Oil Holes {1203}
Customer Communication Module (CCM) for Diesel Engines Diagnostic Code - Troubleshoot
Customer Communication Module (CCM) for Diesel Engines M5X Protocol - Troubleshoot
Customer Communication Module (CCM) for Diesel Engines System - Troubleshoot
3512B Petroleum Engines General Information (Electronic Control System)
723PLUS Digital Speed Control Installation