Technical Glossary: Key Spare Parts Explained

• Fuel Injector: An electronically controlled valve that sprays fuel into the engine's combustion chamber at high pressure.
  Example: Volvo D13 Truck Fuel Injector.

• Engine Oil Cooler: A heat exchanger used to cool engine oil by transferring heat to the coolant or ambient air.
  Example: JCB 3CX Backhoe Loader Oil Cooler.

• Hydraulic Pump: Converts mechanical energy into hydraulic energy to power cylinders and motors.
  Example: Komatsu PC200-8 Excavator Hydraulic Pump.

• Brake Caliper: An assembly that houses brake pads and pistons, squeezing pads against the rotor to stop the vehicle.
  Example: Mercedes-Benz Actros Truck Brake Caliper.

• Thermostat: A valve that regulates the flow of coolant to the engine, maintaining optimal temperature.
  Example: John Deere 6430 Tractor Thermostat.

• Tie Rod End: A ball joint connecting the steering rack/arm to the steering knuckle, allowing wheels to turn.
  Example: Toyota Hilux Pickup Tie Rod End.

• Planetary Gear Set: A compact gear system used for high torque reduction inside transmissions and final drives.
  Example: Caterpillar 950M Wheel Loader Planetary Gear Set.

• Air Spring (Air Bag): A bladder using compressed air to support load and absorb road shock, often replacing leaf springs.
  Example: Freightliner Cascadia Truck Air Spring.

• Glow Plug: A heating element assisting cold starting in diesel engines by heating the air in the combustion chamber.
  Example: Kubota V2203 Engine Glow Plug.

• EGR Valve (Exhaust Gas Recirculation Valve): Re-routes exhaust gas back into the intake to lower combustion temperature and reduce emissions.
  Example: Isuzu FTR Truck EGR Valve.