WESPC Spare Parts Fuel Injector 2645K026 For Perkins 1104D-44TA Engine

WESPC Spare Parts Fuel Injector 2645K026 For Perkins 1104D-44TA Engine

Application:

Fuel Injector 2645K026 is engineered as a service-exchange injector for Perkins T4.236 and AT4.236 four-cylinder turbocharged diesel engines of 4.0 L displacement. These engines have been the backbone of mid-range agricultural tractors, self-propelled combine harvesters, mobile and stationary generator sets, and an extensive range of industrial machinery where precise fuel metering, rapid throttle response and sustained load capability are essential.

Technical specifications:

2645K026 is a 17.5 mm diameter, two-spring, multi-hole injector with five precision-drilled spray holes of 0.205 mm diameter arranged in a 150° included cone angle, delivering fuel at 175 bar opening pressure. The nozzle needle lift is 0.30 mm, providing a calibrated flow of 46.5 mm³ per 1 000 strokes at 100 bar test pressure. The injector body is 82 mm overall length with 12 mm inlet thread for M12 × 1.5 high-pressure pipe and M8 × 1 return line. Electrical resistance of the solenoid coil is 0.9 Ω at 20 °C, permitting rapid actuation within 0.25 ms when driven by the engine’s 12 V ECU or mechanical distributor pump. Static leakage rate is below 5 mm³/min at 175 bar, ensuring stable idle and low-smoke operation.

Material & performance features:

The injector body is forged from heat-treated low-carbon alloy steel with a black oxide finish for corrosion resistance. The nozzle tip is manufactured from high-speed tool steel vacuum-hardened to 60 HRC, then micro-shot-peened to relieve surface stresses and resist cavitation erosion. Internal valve components are centreless-ground to 0.001 mm tolerance for repeatability and long-term stability. The solenoid coil is wound with high-temperature polyimide-insulated copper wire, rated for continuous duty at 150 °C. All sealing interfaces use fluoropolymer O-rings compatible with ULSD and biodiesel blends up to B20. Each injector is flow-matched within ±1 % on computerised test benches to guarantee balanced cylinder contribution and minimal exhaust smoke. The design incorporates a dual-stage spring for precise opening and closing events, reducing combustion noise and improving cold-start performance.

Interchange part numbers:

PERKINS 2645K026, 2645K025, 2645K024; MASSEY FERGUSON 1447168M1, 1447168M91; LANDINI 747604M91; reference crosses also to Stanadyne 28485, Delphi EJBR04601D, Denso 095000-5990, and Bostech BIC2645K026.