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Perkins KRP1721 is the gear driven fuel lift (transfer) pump: the cast body with its two hole mounting flange, the splined drive shaft with seal, and the inlet and outlet ports with yellow caps. It is used on Perkins 2506 and 2806 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 | Fuel Lift Pump |
| Replaces | Perkins KRP1721 |
| Type | Fuel lift (transfer) pump, gear driven |
| Engine | Perkins 2506, 2806 |
| Drive | Splined shaft |
| Mounting | 2 hole flange |
| Also listed as | KRP1679, KRP1555 |
| Fits | Perkins 2506C, 2506TAG3, 2506TAG4 and 2806 diesel engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Perkins machines
Check the part number on your old unit before ordering.
| Perkins Part No.(SPM Part No.) | Fits |
|---|---|
| KRP1721(SPM-HEP-5325) | Perkins 2506C, 2506TAG3, 2506TAG4 and 2806 diesel engines |
Hard starting
A weak lift pump starves the injection pump. Long cranking after standing is a common sign.
Loss of power under load
If the engine pulls well when light but dies off under load, check fuel delivery and the lift pump.
Leaks
Fuel weeping from the pump body or seals means it is time to replace it.
Bleeding the system
Prime and bleed the fuel system after fitting the new pump.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Fab Heavy Parts | USD 223.64 | 4 Nov 2026 |
| Diselmart | USD 254.60 | 4 Nov 2026 |
| MyMROmarts | USD 281.99 | 4 Nov 2026 |
| eBay, aftermarket seller | USD 304.99 | 4 Nov 2026 |
| Buy Machinery Parts | USD 305.99 | 4 Nov 2026 |
| YEM Parts | USD 320.71 | 4 Nov 2026 |
| Spare Part Mart | USD 178.91 | Today |
Our price of USD 178.91 is 20% to 44% 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 Perkins 2506C, and 3 more listed under compatible equipment. Check the old fuel pump is marked KRP1721 or one of the cross references, because makers change parts between serial ranges.
On the Perkins 2506C, 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 fuel pump.
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.
No. It is an aftermarket fuel pump made to replace the Perkins KRP1721. 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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