Need help matching a part? Contact us with the pump number or engine serial, and we'll confirm the correct plunger fit.

Understand the Purpose of a Cummins Plunger in Your Fuel Pump

A fuel injection plunger is the core component of a mechanical fuel pump that builds pressure and meters diesel fuel to the injectors. In a Cummins system, the plunger's key responsibilities include

• Compressing fuel inside the pump barrel

• Controlling injection quantity and timing

• Generating line pressure to activate the injector

• Synchronising fuel delivery with crankshaft rotation

• Maintaining consistent combustion under varying loads

Wear in the plunger or barrel can cause low injection pressure, power loss, uneven combustion and injector failure. That's why replacing a worn plunger with a factory-spec component is essential.

Discover Which Cummins Engines Use These Plungers

Goldfarb supplies plungers compatible with nearly every Cummins mechanical injection platform from the 1970s to the present. Applications include

On Highway Diesel Engines

• Cummins 59L 12 Valve P7100 pump

• Cummins M11 ISM MVT and inline pumps

• Cummins N14 L10 NT855 PT and CELECT systems

• Cummins KT19 QSK Series industrial and heavy truck engines

Off-Highway and Equipment Engines

• Construction vehicles with Cummins QSM11 KTA19 LTA10

• Power generation engines with PT CELECT governor-style pumps

• Agricultural equipment using Cummins B series mechanical platforms

• Mining and rail engines require dual-plunger inline injection systems

Our inventory includes plungers for both single-cylinder and multi-cylinder applications.

Choose the Right Type of Cummins Plunger for Your Pump

We supply multiple plunger formats to match your pump type and engine requirement

New Cummins Plungers

• Manufactured to exact OEM tolerances

• Unused, sealed, and ready for installation

• Ideal for commercial duty and fleet applications

Rebuilt Plungers

• Refurbished with new seal rings and matched barrel sets

• Precision lapped and flow tested

• Cost-effective for older systems or non-critical equipment

Used Inspected Units

• Pulled from low-hour cores

• Inspected for barrel scoring length and pressure loss

• Best suited for testing or short-term operation

Each unit is matched by its part number and compatible with specific pump types such as PT P7100 VP44 MVT.

Identify Your Cummins Plunger with Our Expert Support

Which plunger fits your system? Our team can match parts using the following

• Pump part number such as Bosch 0402736729 PT3054212

• Cummins CPL or engine serial number

• Engine model and application, such as N14, in a 1998 Freightliner

• Pump tag or casting number

• Visual inspection or images of an old plunger

We also support cross referencing from Bosch Zexel and Denso part numbers for imported or remanufactured pumps.

Learn the Symptoms of a Failing Cummins Injection Plunger

When a plunger is worn or leaking, performance declines rapidly. Watch for these signs

• Hard, cold starts or cranking without ignition

• Excessive black smoke or raw fuel smell

• Injector misfire under load

• Uneven cylinder firing

• High fuel return rate from the pump to the tank

• Reduced horsepower or poor throttle response

Goldfarb specialists can assist in diagnosing pump-related issues and verifying if plunger replacement is the correct fix.

Maximise Fuel System Lifespan with Rebuilt or Matched Plungers

Plunger replacement offers significant performance recovery at a lower cost than a pump overhaul. Our rebuilt plungers are especially popular for

• Long-haul fleet rebuilds

• Farm and off-road machinery

• Marine generators

• School buses and vocational vehicles

• Classic diesel restorations

Each plunger is tested for concentricity, end clearance and leakage, ensuring OEM-level functionality.

Get Fast, Reliable Shipping for All Cummins Injection Parts

Goldfarb ensures that your plunger ships quickly and safely

• Same day shipping on orders placed before 330 PM EST Monday to Friday
  

• UPS FedEx USPS shipping options across the United States
  

• Export packaging for international orders
  

• Pickup available at our Rockville MD warehouse
  

• Tracking provided with every shipment
  

We verify address details and cannot ship to PO Boxes due to part size and value.

See Why Goldfarb Is the Top Choice for Cummins Fuel System Parts

For over two decades, Goldfarb and Associates has specialised in diesel injection components, serving both independent technicians and national fleets. Our Cummins plunger inventory is unmatched in availability and quality.

Our advantages include

• Access to thousands of part numbers across Cummins generations

• Stock from all 50 United States and 20 international partners

• In-house testing of high-wear components

• Rebuildable core purchasing programs

• Technical support for identification, troubleshooting, and installation

• Fast shipping and accurate invoicing

Whether you run one truck or a hundred, we'll get your fuel system running right.

Frequently Asked Questions

Are Goldfarb's Cummins plungers OEM?

Yes, we carry OEM equivalent rebuilt and used plungers, all tested for fit and function.

Can I replace just the plunger without changing the barrel?

It depends on the wear level. For minimal wear, you can replace the plunger only, but a matched set is recommended for optimal pressure control.

What happens if I use a mismatched plunger?

Mismatched plungers lead to poor sealing, incorrect injection timing, and eventual pump failure. Always match the correct part number.

Do you offer complete plunger barrel assemblies?

Yes, we offer complete kits with spring tappet and barrel options based on your engine and pump design.

Are rebuilt plungers covered under warranty?

All rebuilt and used plungers are backed by our satisfaction guarantee. Extended terms are available for trade accounts.

Order Your Cummins Plunger Today and Restore Peak Fuel Efficiency

Goldfarb and Associates has the Cummins fuel plungers you need. Whether you're servicing a workhorse B series, rebuilding an NT855 or restoring a classic 12 valve, we deliver OEM quality parts with expert support and fast shipping. Browse our Cummins plunger inventory now or contact us for technical assistance with part matching and availability.