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Cummins 3803138 Water Pump Assembly

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Pulley Diameter	4.25 in
Pulley Grooves	4
Pulley Type	Serpentine
Impeller Material	Stamped Steel
Housing Material	Cast Iron
Drive Type	Belt Drive
Included Components	Gaskets, O-Rings
Weight	13.5 kg
Package Dimensions	32 × 22 × 20 cm

Manufacturer No.

181808
FP-3803138
F020470
AK-3803138
M-3803138
3803138RX
3047469
TP3803138
DS-3803138
TKL3803138

OEM Part No.

3803138
3803030
3052386
3062928
4955844
3052836
3062899
5396-RW1176X
228-2185

Engine Part No.

Cummins NT855
Cummins NH855
Cummins N14 CELECT
Cummins N14 Mechanical
Cummins NT88 Big Cam IV
Cummins NT495
Cummins NT743

Interchange No.

18-1311
181311
6069
RW1176
44084
44084HD
3803139
3803140

The Cummins 3803138 water pump assembly is engineered for the NT855, NH855, N14, and NT88 Big Cam IV engine series. It utilizes a cast iron housing for structural rigidity and a stamped steel impeller designed for high-volume coolant flow. The unit is driven by a 4-groove serpentine pulley measuring 4.25 inches in diameter. The package includes mounting gaskets and O-rings for a complete installation. This pump meets or exceeds OEM specifications for pressure and flow, ensuring reliable thermal management in heavy-duty truck and construction equipment applications.