Essential Parts Terminology

• EGR Cooler: Located in the exhaust gas recirculation system. Cools exhaust gases before they re-enter the engine cylinders. Example: Volvo VNL D13 EGR Cooler.

• Hydraulic Pump: Located in the hydraulic system. Converts mechanical power into hydraulic energy to power actuators. Example: Komatsu PC200-8 Hydraulic Main Pump.

• Planetary Gear Set: Located within the final drive (wheel hub). Reduces speed and increases torque delivered to the wheel. Example: John Deere 8320R Planetary Gear Set.

• Brake Caliper: Located over the brake rotor on the wheel assembly. Squeezes brake pads against the rotor to slow the vehicle. Example: Toyota Camry 2018 Brake Caliper.

• Injector Nozzle: Located in the engine cylinder head. Sprays atomized fuel into the combustion chamber. Example: Cummins ISX Injector Nozzle.

• Swing Bearing (Slewing Ring): Located between the cab/upper structure and the undercarriage of an excavator. Allows the upper structure to rotate 360 degrees. Example: Caterpillar 336 Excavator Swing Bearing.

• Tie Rod End: Located at the end of the steering rack or steering arm. Part of the steering linkage, connecting the steering gear to the wheel hub. Example: Case IH Magnum 340 Tie Rod End.

• Catalytic Converter: Located in the exhaust system. Converts toxic pollutants in the exhaust gas into less harmful pollutants. Example: Honda Civic 2015 Catalytic Converter.

• Air Dryer Cartridge: Located in the air brake system. Removes moisture and contaminants from the compressed air before it enters the storage tanks. Example: Freightliner Cascadia Air Dryer Cartridge.

• Seal Kit (Cylinder): Located within hydraulic cylinders. Prevents hydraulic fluid leakage and separates fluid chambers. Example: JCB 3CX Backhoe Loader Hydraulic Cylinder Seal Kit.