No Products in the Cart
Cummins 3977539 is the six cylinder inline fuel injection pump: six delivery valve holders along the top, the governor and boost housing at one end, the fuel feed pump on the side and a drive hub with a taper shaft. It is used on Cummins 6BTA5.9-C180 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 3977538.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Fuel Injection Pump |
| Replaces | Cummins 3977539 |
| Engine | Cummins 6BTA5.9-C180 |
| Cylinders | 6, inline pump |
| Cross references | 3977538 |
| Fits | Cummins 6BTA5.9-C180 engines in construction machines |
| 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 |
|---|---|
| 3977539(SPM-HEP-5147) | Cummins 6BTA5.9-C180 engines in construction machines |
| 3977538(SPM-HEP-5147) | Cummins 6BTA5.9-C180 engines in construction machines |
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 |
|---|---|---|
| SINOCMP | USD 749.00 | 2 Nov 2026 |
| Kudu Parts | USD 784.00 | 2 Nov 2026 |
| Fab Heavy Parts | USD 817.33 | 2 Nov 2026 |
| FridayParts | USD 849.03 | 2 Nov 2026 |
| eBay, aftermarket seller | USD 913.46 | 2 Nov 2026 |
| YEM Parts | USD 981.55 | 2 Nov 2026 |
| Spare Part Mart | USD 599.20 | Today |
Our price of USD 599.20 is 20% to 39% 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 3977539 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.
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.
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 injection pump.
No. It is an aftermarket fuel injection pump made to replace the Cummins 3977539. 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.
Join and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that. Turn points into a discount whenever you like.
Opens the Marty Mates panel. No password: you enter your email, we send a code, and that is you in with your 200 points waiting. Joining signs you up to our emails and you can leave any time from the link in any of them. See our terms and conditions.
Member deals, specials before they go public, and easy ways to stack up points. Plus a nudge when a part you bought is due, so you are not caught out mid job.
You can leave any time from the link in any email we send. See our terms and conditions.
We will only bother you when it is worth it: a member deal, a specials drop, a way to earn points faster, or a heads up that a part you bought is due.
Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
No password: you enter your email, we send a code, and that is you in.
