Air intake system - grille → hose → air filter → hose → supercharger → hose → intercooler → hose → engine

Exhaust system - supercharger → expansion joint → muffler → exhaust pipe

Cooling system - water tank→hose→thermostat→water pump→diesel engine→hose→water tank

Throttle control system - stepper motor → reducer → worm gear drive → throttle cable → diesel throttle - high idle speed, low idle speed limit switch

Fuel System--

Oil inlet system: fuel tank → hose → hand pump → coarse filter → fine filter → diesel engine

Oil return system: diesel engine → hose → fuel tank (the amount of oil returned is relatively large, use it for partial cooling)