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Cummins 4951358 is the Cummins PT type fuel pump: cast aluminium pump body with the drive flange and coupling, the gear pump section, a red fuel shutoff solenoid valve, throttle shaft and governor housing, with safety wired cover screws; a mounting gasket is included. It is used on Cummins NT855 and K19 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as 3059657 and 3655644.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | PT Fuel Pump |
| Replaces | Cummins 3655644 |
| Engine | Cummins NT855, NTA855, K19 |
| Type | PT fuel pump |
| Cross references | 3059657, 4951358 |
| Fits | Cummins NT855, NTA855 and K19 diesel engines |
| 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 |
|---|---|
| 3655644(SPM-HEP-5118) | Cummins NT855, NTA855 and K19 diesel engines |
| 3059657(SPM-HEP-5118) | Cummins NT855, NTA855 and K19 diesel engines |
| 4951358(SPM-HEP-5118) | Cummins NT855, NTA855 and K19 diesel engines |
Hard starting and low power
A worn injection pump delivers less fuel at lower pressure: long cranking and weak power under load.
Smoke and uneven running
Uneven delivery between cylinders shows as smoke and rough running.
Fuel leaks
Leaks from the pump body or shaft seal mean it is time to replace it.
Fitting tips
Set the pump timing to the engine maker's figure, bleed the fuel system, and use clean fuel and new filters.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay, aftermarket seller | USD 1,145.73 | 2 Nov 2026 |
| Buy Machinery Parts | USD 1,299.00 | 2 Nov 2026 |
| Amazon (XYohykai) | USD 1,460.00 | 2 Nov 2026 |
| Amazon (FridayParts) | USD 1,556.00 | 2 Nov 2026 |
| SINOCMP | USD 1,599.00 | 2 Nov 2026 |
| FridayParts | USD 1,619.63 | 2 Nov 2026 |
| Fab Heavy Parts | USD 1,839.66 | 2 Nov 2026 |
| Spare Part Mart | USD 916.26 | Today |
Our price of USD 916.26 is 20% to 50% 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 was made for the Cummins NT855, and 2 more listed under compatible equipment. Check the old fuel injection pump is marked 4951358 or one of the cross references, because makers change parts between serial ranges.
On the Cummins NT855, 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.
Yes. Fill the pump and its suction line with clean fluid before the first start. Running it dry, even for a few seconds, can score it.
Clean them right back to metal and fit the new gasket or O-ring dry, unless the engine manual calls for sealant.
No. It is an aftermarket fuel injection pump made to replace the Cummins 4951358. 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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