Engine Oil Pump: This is the heart of the engine's lubrication system. It circulates lubricating oil from the oil pan to all moving parts, reducing friction and wear. Installed inside the engine block or oil pan. Example: Caterpillar 330D Engine Oil Pump, 卡特彼勒 330D 发动机机油泵, Масляный насос двигателя Caterpillar 330D.

Fuel Injection Pump: Delivers fuel at high pressure to the engine's combustion chambers. Installed in the fuel system, often on the engine block. Example: Komatsu PC200-8 Fuel Injection Pump, 小松 PC200-8 燃油喷射泵, Топливный насос высокого давления Komatsu PC200-8.

Water Pump: Circulates coolant through the engine and radiator to regulate temperature. Installed in the engine's cooling system. Example: Cummins 6BT Water Pump, 康明斯 6BT 水泵, Водяной насос Cummins 6BT.

Oil Pump Gear: Gears within the oil pump that create pressure to move the oil. Located inside the oil pump assembly. Example: Caterpillar C15 Oil Pump Gear, 卡特彼勒 C15 机油泵齿轮, Шестерня масляного насоса Caterpillar C15.

Oil Seal: Prevents oil from leaking out of a component or around a rotating shaft. Found in various locations like crankshafts, camshafts, pumps. Example: Yanmar 4TNV98 Crankshaft Oil Seal, 洋马 4TNV98 曲轴油封, Сальник коленвала Yanmar 4TNV98.

Pressure Switch: An electrical switch that opens or closes based on fluid pressure. Used in oil, fuel, or hydraulic systems to monitor pressure levels. Example: Komatsu PC300-7 Oil Pressure Switch, 小松 PC300-7 机油压力开关, Датчик давления масла Komatsu PC300-7.

Sensor (Pressure Sensor): Measures the pressure of a fluid or gas and converts it into an electrical signal for the control system. Found in fuel systems, oil systems, intake manifolds, etc. Example: Cummins QSL9 Fuel Rail Pressure Sensor, 康明斯 QSL9 燃油共轨压力传感器, Датчик давления в топливной рейке Cummins QSL9.

Hydraulic Oil Main Pump: The primary pump in a hydraulic system that generates the flow and pressure needed to operate hydraulic cylinders and motors. Typically located near the engine, connected via a coupling. Example: Komatsu HM400-2 Hydraulic Oil Main Pump, 小松 HM400-2 液压主泵, Главный гидравлический насос Komatsu HM400-2.

Engine Mount: Supports the engine and absorbs vibrations, connecting the engine to the vehicle frame. Example: Ford F-150 Engine Mount, 福特 F-150 发动机支架, Опора двигателя Ford F-150.

Radiator: Part of the cooling system that dissipates heat from the engine coolant into the air. Located at the front of the vehicle or equipment. Example: John Deere 8R Tractor Radiator, 约翰迪尔 8R 拖拉机散热器, Радиатор трактора John Deere 8R.