Fuel Pump Drive Shaft 3095356 – The Small Part That Keeps Your Cummins® On Time

In every Cummins fuel system there's one hidden component that quietly synchronises the engine gear train and the high-pressure pump: the fuel pump drive shaft. Part number 3095356 is a genuine-pattern shaft engineered for a wide range of modern Cummins engines, especially EPA07 15-liter ISX / QSX platforms and other heavy-duty models using PT or high-pressure fuel pumps 

Whether you run highway trucks, industrial equipment or generator sets, replacing a worn drive shaft during pump service is cheap insurance against unplanned downtime.

 

 

Think of this shaft as the mechanical "spine" of the fuel pump:

It transfers torque directly from the timing gear train into the fuel pump cam assembly, so injection events stay perfectly synchronised with piston position.  

It must withstand continuous torsional load, shock, and vibration at engine speeds that can sit near governed rpm for hours at a time.

Any wear, bending or spline damage can lead to timing scatter, noisy operation, or in the worst case, a complete fuel-pump drive failure.

Installing a new 3095356 drive shaft restores that mechanical link so your pump can build pressure smoothly on every revolution.

 

 

Different distributors list this shaft for several Cummins families. Across those listings you'll see:

EPA07 15 L ISX / QSX engines – specified by Cummins as the primary application.  

QSM11 / ISM11 industrial and on-highway engines – common in construction machinery and vocational trucks 

NT / N14 legacy heavy-duty engines, via Interstate-McBee and other premium aftermarket brands.  

Because Cummins often reuses housings across models, you should always confirm fitment by engine serial number or pump part number-but if your catalog or old shaft shows 3095356, this listing is aimed at your application.

 

Professional suppliers describe 3095356 as a fuel pump drive shaft built to OEM standards:

Material: High-grade alloy steel, heat-treated and precision ground along journals and drive features for long life in lubricated diesel environments 

Dimensions: Package data of roughly 7.0 × 1.4 × 1.4 in gives an idea of the shaft's overall envelope – compact but extremely robust.  

Condition: Available as genuine Cummins or premium aftermarket (Interstate-McBee, Diesel Parts Direct, etc.), with warranties ranging from 12-month coverage on standard aftermarket parts up to 24 months on certain premium brands.  

Quality control: Aftermarket manufacturers emphasise that their 3095356 replacements meet or exceed OEM specifications, specifically in hardness, concentricity and surface finish, to prevent premature bearing and gear wear. d 

On your product page you might summarise it like:

"Fuel Pump Drive Shaft 3095356 – OEM-spec Cummins shaft for ISX/QSX15, QSM11/ISM11, NT/N14 and related engines. Precision-ground alloy steel, designed for long service life in heavy-duty diesel applications."

 

When rebuilding a fuel pump, many shops focus on plungers, seals and bearings-but the drive shaft works just as hard:

Reduces vibration & noise
A straight, true shaft minimises run-out, so the pump cam and gears mesh smoothly. Drivers and operators feel less "gear buzz" through the cab.

Protects new internals
Installing new plungers and bearings on a worn shaft can create misalignment and uneven loading. A fresh 3095356 gives your rebuilt pump a clean mechanical baseline.

Prevents catastrophic failure
Tiny cracks at keyways or splines can grow under cyclic load. Replacing an old shaft proactively is far cheaper than dealing with a broken drive in service.

For fleets, changing the shaft whenever a high-hour pump is opened is a simple way to extend engine uptime.

 

 

A short, practical block on your site reassures professional buyers:

Strip and inspect – during pump disassembly, check the old shaft for scoring, blueing, wear at bearing positions and any spline/keyway damage.

Renew bearings & seals – don't mate a new 3095356 shaft with severely worn bushings; you'll simply transfer the problem.

Press in correctly – support the housing properly when pressing out and in to avoid cracking castings or scratching journals.

Re-time the pump – once reinstalled on the engine, follow Cummins timing procedures so injection remains in phase with the crankshaft.

Run & verify – after start-up, listen for smooth pump operation and confirm stable fuel pressure and engine response.

 

 

 

Confirm the fault – use leak-off measurement or rail-pressure tests to identify suspect injectors.

Work clean – any contamination on the high-pressure side can damage the new unit quickly.

Replace sealing hardware – fit the new copper washer / seal ring and any one-time bolts.

Torque & code – tighten to MAN specs, then program the new code into the ECU.

Check results – verify stable idle, balanced cylinder corrections and clean exhaust under full load.

 

 

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