Caterpillar 3210955 Fuel Injector Assembly

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Injection Type	Common Rail
Fuel Type	Diesel
Weight (kg)	0.66 kg
Length	223.5 mm
Width	121.9 mm
Height	129.5 mm
Package Dimensions	22.35 × 12.19 × 12.95 cm

Manufacturer No.

3210955
321-0955

OEM Part No.

3210955
3200688

Engine Part No.

Caterpillar C6.6
Caterpillar C4.4
Perkins 1106D-E66TA

Interchange No.

2820455
2939555
10R7669
10R-7669
2645A710
2645A732
2645A744

Fitment Vehicles

Caterpillar 320D GC
Caterpillar 320D L
Caterpillar 323D L
Caterpillar CB-54
Caterpillar CB-64
Caterpillar CS-54

The Caterpillar 3210955 is a common rail diesel fuel injector designed for C6.6 and C4.4 industrial engines. It features solenoid-actuated injection control calibrated to OEM trim codes for precise fuel metering and combustion efficiency. The injector assembly includes the nozzle, control valve, and solenoid coil integrated into a single serviceable unit.

Cross-reference interchange includes Caterpillar OEM 3200688, remanufactured part number 10R-7669, and aftermarket references 2820455, 2939555, 2645A710, 2645A732, and 2645A744. Primary applications cover Caterpillar 320D GC, 320D L, 323D L hydraulic excavators and CB-54, CB-64, CS-54 compactors equipped with C6.6 or C4.4 engines. Also fits Perkins 1106D-E66TA industrial power units.