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Cummins 3945361 is the engine coolant pump with a double groove pulley, cast body, bearing, seal and impeller. It is used on Cummins NH220 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Water Pump |
| Replaces | Cummins 3945361 |
| Fits | Cummins NH220 engines, including Komatsu D65 dozers |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Cummins machines
Check the part number on your old unit before ordering.
| Cummins Part No.(SPM Part No.) | Fits |
|---|---|
| 3945361(SPM-HEP-4493) | Cummins NH220 engines, including Komatsu D65 dozers |
What it does
It circulates coolant through the block, head and radiator. A worn seal or bearing lets coolant out and the engine overheat.
Where it is used
Made for the Cummins NH220 engines and including Komatsu D65 dozers. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (3 aftermarket sellers) | USD 89.72 to 105.01 | 30 Oct 2026 |
| FridayParts | USD 117.88 | 30 Oct 2026 |
| Kudu | USD 147.00 | 3 Nov 2026 |
| Fab Heavy Parts | USD 173.59 | 3 Nov 2026 |
| MyMROmarts | USD 178.99 | 3 Nov 2026 |
| SINOCMP | USD 209.00 | 30 Oct 2026 |
| Spare Part Mart | USD 71.78 | Today |
Our price of USD 71.78 is 20% to 66% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it is a direct replacement for the Cummins 3945361 with the same fitting.
Often 5,000 to 10,000 hours with clean fluid, much less with dirt or air in the system. It is usually changed on condition, not by hours.
Leaks from the seal or weep hole, noise or whining, overheating, or falling pressure or flow under load.
Most failures come from contamination, cavitation from a restricted inlet, or running low on fluid. Check the inlet and the fluid before fitting the new water pump.
If the coolant is old or dirty, yes. Worn coolant is the usual cause of seal failure, and a new pump in old coolant fails the same way.
No. It is an aftermarket water pump made to replace the Cummins 3945361. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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