Forklift Fuel Injection Pump BH4QT80R9 – XinChai C490 Engine

Forklift Fuel Injection Pump BH4QT80R9 — Diesel Injection Pump for XinChai C490 Engine

This forklift fuel injection pump part number BH4QT80R9 is a Kingstream OEM diesel fuel injection pump for the XinChai C490 engine used in forklift trucks across building material, manufacturing, construction, port, warehousing, freight yard, energy, mining, and agricultural environments. The BH4QT80R9 is a 4-plunger inline injection pump — each plunger precisely meters and pressurizes fuel to a dedicated cylinder through its individual high-pressure injection line. The injection pump is the most precision-critical component on a diesel engine, timing each injection event to within fractions of a crankshaft degree to ensure complete combustion. 20kg with 200×80×80cm packaging. 100% professional tested with machinery test report provided. Carton box packaging with 7-15 day delivery. Kingstream OEM available.

Installing the BH4QT80R9 injection pump on a XinChai C490 engine requires precise mechanical timing to the engine camshaft or timing gear train. The pump mounting flange has alignment marks that must correspond with timing marks on the engine at the correct crankshaft position — typically with cylinder number one at top dead center on the compression stroke. The pump drive coupling or gear must be engaged correctly, and the pump mounting bolts torqued evenly to prevent distortion of the pump housing. After mechanical installation, each of the four high-pressure injection lines must be connected from the pump delivery valves to the corresponding cylinder injectors in the correct firing order — crossing injection lines between cylinders will cause misfiring and potential engine damage on startup. Before attempting to start the engine, the low-pressure fuel supply side must be primed using the manual priming pump or lift pump to fill the injection pump internal fuel gallery and purge trapped air. The engine will not start with air in the injection pump because air compresses while fuel does not — the pump cannot develop injection pressure against an air pocket. After startup, verify the engine runs smoothly across all RPM ranges, does not produce excessive black or white smoke, and returns to idle without stalling. The injection timing can be fine-tuned by slightly rotating the pump on its mounting flange — advancing timing increases power but raises cylinder pressures and combustion noise, while retarding timing reduces NOx emissions but increases exhaust gas temperature and fuel consumption. 100% professional tested with machinery test report provided. Kingstream OEM for XinChai C490 forklift fleet operators.

Technical Specifications

100% professional tested. Machinery test report. Kingstream OEM. For bulk orders, contact us.