Cummins® Gear Fuel Pump 4954880 — Steady Supply For N14 / L10 / M11 / ISM / QSM Engines

On a heavy truck or piece of industrial equipment, the injection system can only be as good as the low-pressure pump feeding it. When the gear fuel pump starts to wear, you see it as hard hot starts, rail or PT pressure sag, and a frustrating loss of power under load. The assembly identified as 4954880 is a genuine-pattern Cummins gear fuel pump, used across a wide range of L10, M11, ISM and QSM11 / N14 mid- and heavy-duty engines in on-highway and off-highway service.  

Many OEM and aftermarket listings also describe it as a fuel gear pump / gear fuel pump for Cummins N14, ISM, M11, QSM11 applications, often cross-referencing popular replacement kits and reman units.

 

 

Across manufacturer and distributor catalogs you'll see the same pattern:

Cummins part number: 4954880 (Gear Fuel Pump)  

Typical engine families:

N14, L10, M11, ISM, QSM / QSM11 on-highway and industrial diesels  

Common crosses / equivalent references:

Cummins: 4010253, 3068889, 3095634, 3348112, 4010319, 4010324  

Aftermarket: PAI 180123, Interstate-McBee M-4954880 Diesel Parts Center+1

Some listings also note a 13-tooth gear and 3/4"-16 O-ring port, useful if you're double-checking against an installed unit or a worn casting on the bench.

 

 

Think of the 4954880 as the "heart" of the low-pressure side:

• Stable feed pressure to your injection system
By using a positive-displacement gear set, the pump delivers a predictable volume per revolution, giving the PT or common-rail high-pressure stage a steady supply of fuel even at low idle. That's key for clean starts and consistent response.

• Faster priming & better hot starts
A healthy gear pump builds transfer pressure quickly after cranking, so the engine lights off with fewer revolutions-especially noticeable on hot restarts where a tired pump would otherwise struggle.

• Protection for injectors & high-pressure pump
If transfer pressure sags, the high-pressure pump and injectors end up cavitating. Restoring the 4954880 gear pump helps keep upstream pressure in the target band, reducing wear and noise.

Many vendors position 4954880 explicitly as a gear fuel pump for Cummins ISM / N14 / M11 / QSM engines where operators complain about rough idle, misfire and excess fuel use-classic signs of a compromised low-pressure pump

 

 

Type: Engine-mounted gear fuel pump (low-pressure / transfer pump)

Brand level: Supplied as Cummins OEM or high-quality aftermarket equivalent, engineered to meet or exceed OEM standards.  

Approx. weight: ≈ 3.0 kg (single unit) JYHY DIESEL

Design details (typical):

Internal hardened steel gears for long life

13-tooth drive gear, 3/4"-16 O-ring outlet port on many replacements 

Sealed body designed for diesel fuel and harsh under-hood environments

Condition & packaging: New pump, individually boxed (1 pc / box), with most suppliers offering a multi-month warranty and fast-ship stock.  

You can describe it succinctly on your site as:

"Cummins® 4954880 gear fuel pump for N14 / L10 / M11 / ISM / QSM engines – OEM-spec low-pressure supply pump for heavy-duty trucks and industrial equipment."

 

 

Line-haul tractors with N14 or ISM that are idling rough, surging slightly on throttle, or showing falling MPG over time.

Construction or agricultural machines running L10 / M11 / QSM11 power that struggle with hot starting or lose power under sustained load.  

Preventive maintenance: shops refreshing the gear pump whenever injectors and high-pressure hardware are replaced, to reset the entire fuel system's baseline.

 

 

Confirm the diagnosis – check transfer-pressure readings and filter condition; rule out restrictions before blaming the pump.

Swap the assembly – follow Cummins procedures for depressurising the system, then remove the old gear pump and install 4954880, aligning the gear drive correctly.

Inspect seals & lines – renew O-rings and hoses as needed; a tight low-pressure side is crucial.

Prime, start, verify – prime the system, then verify smooth idle, clean acceleration and correct transfer pressure at key rpm points.

 

 

 

 

 

 

To make your purchasing experience smooth and easy, we offer a variety of secure payment options:

We're here to make your order process worry-free - choose the payment method that works best for you!

 

 

Hot Tags: cummins® gear fuel pump 4954880 — steady supply for n14 / l10 / m11 / ism / qsm engines, China cummins® gear fuel pump 4954880 — steady supply for n14 / l10 / m11 / ism / qsm engines manufacturers, suppliers, factory, abosede accessories