Forklift Fuel Injection Pump 4D29G31-21100 — Diesel Injection Pump for Xinchai Forklift Engines

This forklift fuel injection pump part number 4D29G31-21100 is a Kingstream OEM diesel fuel injection pump for Xinchai forklift engines across hotels, garment, building material, manufacturing, construction, energy, mining, and food and beverage environments. The fuel injection pump is the most precise and critical component of a diesel engine — it pressurizes diesel fuel to injection pressures of 200-300 bar or higher and meters the exact fuel quantity to each cylinder at precisely the correct crankshaft angle for combustion. A worn or malfunctioning injection pump causes hard starting, rough idling, black smoke (over-fueling), white smoke (under-fueling or incorrect timing), power loss, and increased fuel consumption. 20kg in wooden box packaging. 100% professional tested with 7-15 day delivery. Kingstream OEM available.

Installing the 4D29G31-21100 fuel injection pump on a Xinchai diesel engine requires specialized diesel fuel system knowledge and precision timing tools. The injection pump is driven by the engine camshaft or timing gear train and must be mechanically timed so that fuel injection into each cylinder occurs at the precise crankshaft angle specified by the engine manufacturer — typically 14-18 degrees before top dead center on the compression stroke. The timing procedure involves aligning timing marks on the pump drive flange with marks on the engine, locking the engine at the correct crankshaft position, and bolting the pump in place. After mechanical mounting, the high-pressure injection lines connecting the pump to each injector must be installed and torqued — these lines operate at injection pressure and must not be bent, kinked, or cross-threaded at the fittings. After installation, the injection pump’s internal fuel gallery must be primed to purge air from the low-pressure side before the engine can start. Once running, the injection timing should be verified with a timing light or by checking the injection pump spill timing according to the service manual. Incorrect injection timing — even by 1-2 degrees of crankshaft rotation — causes hard starting, increased fuel consumption, elevated exhaust gas temperatures, black or white smoke, and in severe cases piston crown erosion or cylinder head cracking from excessive combustion chamber temperatures. Because of the precision required, fuel injection pump installation on Xinchai engines should be performed by a qualified diesel technician. 100% professional tested quality with wooden box packaging for shipping protection. Kingstream OEM for Xinchai forklift fleet operators.

Technical Specifications

100% professional tested. Wooden box packaging. Kingstream OEM. For bulk orders, contact us.