Key Component Glossary for Heavy Equipment

• Fuel Injector: A precision component on the Engine (Fuel System) that sprays fuel into the engine cylinders. Example: Caterpillar 3406E Fuel Injector.

• Hydraulic Pump: A device located on the Hydraulic System that converts mechanical power into hydraulic energy (flow and pressure). Example: Komatsu PC200-8 Main Hydraulic Pump.

• Differential Lock: A mechanism on the Axle/Drive Train used in heavy trucks and agricultural machinery to lock the two sides of the axle together for maximum traction. Example: Shacman F3000 Differential Lock Switch 81255056267.

• Air Compressor: A component on the Engine (Braking System) that compresses air for the vehicle's air brakes and suspension. Example: Volvo FH16 Air Compressor.

• Torque Converter: A fluid coupling component located between the Engine and Transmission in automatic or powershift systems to transfer rotating power. Example: Liugong CLG856 Torque Converter.

• EGR Valve: A valve on the Exhaust System that regulates the amount of exhaust gas returned to the engine cylinders to reduce NOx emissions. Example: Cummins ISX EGR Valve.

• Slew Ring Bearing: A large diameter bearing located on the Chassis/Frame that allows the superstructure of an excavator to rotate. Example: Doosan DX300LC Slew Ring Bearing.

• Tie Rod End: A joint located on the Steering System that connects the steering rack to the wheel hub, allowing the wheels to turn. Example: Mercedes-Benz Actros Tie Rod End.

• PTO Switch: A control on the Dashboard/Control Panel that engages an output shaft to power auxiliary equipment. Example: Isuzu F-Series PTO Switch.

• Water Pump: A component on the Engine (Cooling System) that circulates coolant through the engine block and radiator to dissipate heat. Example: JCB 444 Engine Water Pump.