Hanchi Auto Parts
3801788 Water Pump Suitable for Cummins NT855 NTA855 High Quality
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The OE number 3801788 identifies a water pump fitted to NT855 and NTA855 engines. We stock a direct replacement built to the same shaft and pulley heights. One pump weighs 10.20 kg; a full carton holds 2.
Which engines use the 3801788 water pump?
Fitment covers NT855; NTA855.
When in doubt, compare the old pump pulley height against our spec table below — it settles most fitment questions.
What are the specifications of 3801788?
| Parameter | Value |
| OE number | 3801788 |
| Fits brand | Cummins |
| TO Belt pulley height | 86.8 |
| TO Impeller height Ⅱ | 30 |
| TO Shaft head height | 85.5 |
| Pulley Jumping | 0 |
| Mounting hole position | Aligned to OE mounting points |
| Threads on the pump body | 2-1/2-20UNF |
| Belt pulley thread | 2-3/8-16UNC |
| Air tightness testing | No leakage detected under negative pressure of 0.1 MPa |
| Appearance Ⅰ | Neutral finish, no third-party logos |
| Appearance Ⅱ | Clean surface: no dirt, rust or paint peeling |
| Assembly rotation | Turns freely by hand, no sticking or noise |
| Included Component 1 | O44.6X3.55 |
| Net weight | 10.20 kg |
| Packing | 2 pcs/ctn, 23.40 kg gross |
What part numbers interchange with 3801788?
Dealers and fleet systems quote this pump under more than one OE number:
- 3801708
Packing and quality checks
Packing runs 2 pumps per carton, 23.40 kg gross weight, carton size 59 x 38 x 21 cm.
We leak-test each unit at a negative pressure of 0.1 MPa, then spin it by hand to confirm free rotation.
Frequently asked questions
What vehicles or engines does 3801788 fit?
3801788 fits NT855 and NTA855 engines. It is a Cummins application water pump, and our aftermarket unit replaces it directly.
What other part numbers replace 3801788?
3801788 interchanges with 3801708. All of these refer to the same water pump assembly.
Is 3801788 available from stock?
Yes, this number is in regular production. Lead time for carton quantities is usually a few days; ask us for current stock before ordering.
How much does the 3801788 water pump weigh?
One pump weighs 10.20 kg net. A full carton of 2 pieces comes to 23.40 kg gross.
How do I confirm 3801788 is the pump I need?
Check the OE number stamped on your old pump or in the parts book, then compare engine model and pulley height with the spec table on this page. If anything is unclear, send us a photo of the old unit.
Stock moves fast on this number. Send your inquiry with quantity and destination port for a firm quote.
Send the OE number, your quantity and your destination port — feel free to Contact Us. We reply with fitment confirmation and a quote.
OEM Avalible
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