Cummins 3046200 Fuel Pump Coupling Spider & 4026171 Gasket Kit

Description

Cummins 3046200 Fuel Pump Coupling Spider and 4026171 Gasket Kit

This is a two-piece fuel pump service kit for many Cummins heavy-duty diesel engine applications. The kit includes one replacement 3046200 jaw coupling spider and one 4026171 fuel pump mounting gasket.

These parts are commonly replaced when removing, reinstalling, or servicing the fuel pump on Cummins N14, NH/NT855, Small Cam, Big Cam, M11, and related engine applications.

The coupling spider transfers rotation through the fuel pump drive coupling. The mounting gasket seals the joint where the fuel pump assembly attaches to its drive or mounting housing.

This listing includes both parts shown: one coupling spider and one mounting gasket.

What Is Included?

• Quantity 1: Fuel pump jaw coupling spider replacing Cummins 3046200
• Quantity 1: Fuel pump mounting gasket replacing Cummins 4026171

This is a convenient service pair for mechanics who do not want to remove the fuel pump and then discover that either the drive spider or mounting gasket also needs replacement.

Product Specifications

• Part type: Fuel pump coupling spider and mounting gasket kit
• Primary spider number: 3046200
• Primary gasket number: 4026171
• Spider style: Six-lobe jaw coupling insert
• Approximate spider outside diameter: 2.125 inches
• Approximate spider inside diameter: 0.875 inch
• Approximate spider thickness: 0.42 inch
• Fuel system: Diesel
• Condition: New
• Quantity: One spider and one gasket

Measurements are approximate. Compare the original coupling, mounting arrangement, and part numbers before installation.

What Does the Fuel Pump Coupling Spider Do?

The 3046200 spider fits between the opposing jaws of the fuel pump drive coupling. It transfers rotational force from the engine accessory drive to the fuel pump while providing a small amount of cushioning between the metal coupling hubs.

Because the spider is a wear component, age, heat, vibration, contamination, or long service hours may cause it to harden, crack, deform, or break apart.

If the spider fails completely, the drive may no longer turn the fuel pump correctly. A badly worn spider may also allow excessive movement or backlash between the coupling halves.

What Does the 4026171 Gasket Do?

The 4026171 gasket seals the fuel pump mounting flange. It should be inspected whenever the fuel pump is removed from the engine or drive assembly.

Reusing an old, compressed, torn, or oil-soaked gasket can result in seepage around the mounting joint. Replacing the gasket while the pump is already removed avoids having to repeat the job later.

Common Reasons to Replace This Kit

• Removing or reinstalling the Cummins fuel pump
• Replacing a cracked or deteriorated coupling spider
• Excessive free play in the fuel pump coupling
• Coupling noise, chatter, or vibration
• Broken pieces found inside the coupling area
• Fuel pump is not being driven correctly
• Leakage or seepage around the fuel pump mounting flange
• Fuel pump overhaul or replacement
• Engine overhaul or accessory drive service
• Preventive replacement while the pump is already removed

A no-start, loss of power, or fuel delivery problem can have many possible causes. Inspect the complete fuel pump, drive hubs, accessory drive, fuel supply, and coupling arrangement rather than assuming the spider is the only failed component.

Common Cummins Engine Applications

Part numbers 3046200 and 4026171 are used in multiple Cummins heavy-duty and industrial fuel pump arrangements. Common engine families may include:

• Cummins N14
• Cummins N14 Mechanical
• Cummins N14 Celect and Celect Plus applications using the matching drive
• Cummins NH855
• Cummins NT855
• Cummins NTA855
• Cummins NTC855
• Cummins 855 Small Cam
• Cummins 855 Big Cam
• Cummins L10 and M11 applications using the matching fuel pump drive
• Cummins M11 Mechanical
• Cummins M11 Celect and Celect Plus
• Select Cummins ISM and QSM11 applications
• Select Cummins KT19 and KTA19 applications
• Select Cummins KT38 and KTA38 applications
• Select Cummins KT50 and KTA50 applications
• Additional industrial, generator, marine, construction, and heavy-truck applications using the same parts

This is not a blanket fitment for every engine in these families. Cummins used different fuel pumps, accessory drives, compressors, and coupling arrangements depending on engine serial number, CPL, production date, and application.

3046200 Coupling Spider Part Numbers

The coupling spider is commonly identified by the following numbers:

• 3046200
• M-3046200
• FP-3046200
• 109859
• 44681C
• 44681-C
• PAI 180929

The number 162426 is also frequently associated with Cummins fuel pump jaw coupling spiders. However, some parts catalogs list 162426 separately as a black spider while 3046200 is commonly supplied in a white or light-colored material.

If the original number is 162426, compare the dimensions, coupling style, engine application, and parts breakdown before ordering rather than relying on color alone.

4026171 Fuel Pump Gasket Part Numbers

The included mounting gasket replaces or crosses to many earlier Cummins gasket numbers, including:

• 4026171
• 3069103
• 3076228
• 3048341
• 3035053
• 3029087
• 200817
• 156826
• 103005
• Interstate-McBee M-4026171
• Interstate-McBee M-3069103
• Interstate-McBee M-3076228
• PAI 131368

Additional published interchange lists may show 210374, 214174, or 3821308. Because older Cummins gasket numbers can vary by pump, compressor, and accessory-drive arrangement, confirm the application before relying on one of these less common references.

3046200 and 4026171 on Cummins N14 Engines

Cummins N14 fuel-system parts breakdowns show the 3046200 spider coupling and 4026171 fuel pump mounting gasket in the same fuel pump drive area.

This makes the two-piece kit particularly useful when servicing an N14 fuel pump. The pump can be removed, the coupling spider inspected or replaced, and the mounting joint reassembled with a new gasket.

Searches for this application may include:

• N14 fuel pump spider
• N14 fuel pump coupling
• N14 PT pump coupling
• N14 fuel pump mounting gasket
• Cummins 3046200
• Cummins 4026171

Small Cam and Big Cam Cummins Applications

The same general parts are also commonly cataloged for many Cummins NH, NT, NTA, and NTC 855-series engines, including engines commonly described as Small Cam and Big Cam Cummins engines.

These engines were used in a wide range of highway trucks, construction equipment, agricultural machinery, generators, motor coaches, marine equipment, and industrial applications.

The vehicle manufacturer alone does not confirm fitment. A Freightliner, International, Kenworth, Peterbilt, White, Autocar, motor coach, or piece of industrial equipment may contain one of several Cummins engines and fuel pump arrangements.

M11 and Other 11-Liter Cummins Applications

Cummins catalogs also associate 3046200 and 4026171 with 11-liter M11 engine applications. Similar fuel pump drive arrangements may appear on select L10, M11, ISM, and QSM11 engines.

For these applications, verify the complete engine serial number and fuel pump drive arrangement. Do not assume that every electronically controlled 11-liter engine uses the same coupling components.

Important: Not a General Dodge Ram Cummins Part

This kit should not be advertised as a universal Dodge Ram Cummins fuel pump part.

Dodge Ram pickups commonly use B-series 5.9L or 6.7L engines with different injection pump and fuel pump drive arrangements. Do not order this kit for a Dodge pickup solely because the vehicle has a Cummins engine.

Fitment must be based on the Cummins engine model, engine serial number, CPL, fuel pump arrangement, or original part numbers.

How to Confirm Fitment

The best way to confirm this kit is to check:

• The Cummins engine serial number
• The engine CPL number
• The exact engine model
• The fuel pump or PT pump model
• The original coupling spider number
• The original gasket number
• The spider outside diameter, inside diameter, and thickness
• The number and arrangement of mounting-gasket bolt holes

When requesting fitment assistance, provide the engine serial number from the Cummins data plate. A truck make, motorhome model, or equipment brand by itself is usually not enough to identify internal engine and fuel-system parts.

Installation Notes

• Clean the outside of the fuel pump and drive area before disassembly.
• Disconnect the batteries and follow the equipment manufacturer’s service procedure.
• Note the position of all fuel lines, linkages, fittings, and mounting hardware.
• Inspect both metal coupling hubs for wear, damage, or excessive looseness.
• Remove all remnants of the old mounting gasket without damaging the sealing surfaces.
• Do not force the new spider into badly worn or misaligned coupling jaws.
• Make sure the coupling engages correctly as the fuel pump is installed.
• Start mounting hardware by hand and tighten it to the specification for the particular engine and pump arrangement.
• Prime or bleed the fuel system according to the applicable Cummins service procedure.
• After starting the engine, inspect the mounting area for leaks, abnormal movement, or unusual noise.

Why Replace the Spider and Gasket Together?

The coupling spider is located in the same general area accessed during fuel pump removal. The mounting gasket normally cannot be reused reliably after the pump has been separated from its mounting surface.

Replacing both parts during the same service helps prevent:

• Reinstalling a hardened or cracked coupling insert
• Reusing an old compressed mounting gasket
• Repeating the fuel pump removal procedure
• Unexpected downtime caused by an inexpensive wear component

Fitment and Trademark Notice

All manufacturer names, engine models, and part numbers are used for identification and reference purposes only. This is a replacement service kit and is not represented as a genuine Cummins product unless specifically stated in the product attributes and packaging information.