Free help & advice Learn more
Cummins  |  SKU: 4307021

4307021 | Genuine Cummins® Fuel Injection Pump QSL8.9L, ISL8.9L, ISC, QSC8.3

$3,49900
Shipping calculated at checkout.

Need a quote?

Contact us — we’ll send you a quick and accurate offer!

  • help@forcetruckparts.com
  • +1 (828) 233-5509

Return Within 30 Days
  • The item can be returned within 30 days from the date of receipt.
  • Not satisfied? Contact us by email or phone for return instructions or exchange

Shipping Terms
  • Enjoy free shipping on orders over $100.
  • Orders placed before 6:30 PM (EST) are shipped the same day.

365 Days Warranty!

Buy safely, Returns within 30 days.

Description:
A Fuel Injection Pump 4307021 is a key component in a diesel engine (and some gasoline engines) that delivers fuel from the tank to the engine’s cylinders at the correct pressure and timing for proper combustion.

Part Number: 4307021, 4307021NX, 4307021RX
Condition: New
Manufacture/Brand: Cummins

Fits 4307021 For Cummins EPA10 8.9 liter ISC/ISL engines
Hyundai Excavator: HX330L, HX380L, HX430L
Engines: 
B6.7 CM2350 B121B, ISL9 CM2350 L101, ISL9 CM2350 L111, L9 CM2350 L116B, L9 CM2350 L119B, L9 CM2350 L120C, L9 CM2350 L123B, QSL9 CM2250, QSL9 CM2350 L102, QSL9 CM2350 L118, QSL9 M CM2250 L106

Purpose of using 4307021:

  • Pressurize fuel for injection into the combustion chamber

  • Control fuel timing to match the engine’s cycle

  • Regulate fuel quantity based on engine speed and load

  • Ensure efficient combustion, maximizing power and fuel economy

  • Reduce emissions by preventing over- or under-fueling


Signs of a Bad Fuel Injection Pump 4307021:

Engine performance issues

  • Loss of power or poor acceleration

  • Engine misfires or runs unevenly

  • Rough idle

Starting and fuel problems

  • Hard starting or engine takes longer to crank

  • Stalling, especially under load or at low speeds

  • Reduced fuel efficiency

Unusual noises

  • Whining, ticking, or knocking sounds from the pump

Warning lights or codes

  • Check Engine Light

  • Fuel system or injector-related diagnostic trouble codes

Exhaust issues

  • Excessive smoke (black, blue, or white) from incomplete or improper combustion

 

About the Manufacturer – Cummins:
Cummins is a leading American manufacturer of diesel and natural gas engines, as well as power generation systems and emissions solutions. Founded in 1919 and headquartered in Columbus, Indiana, Cummins is known globally for its durable, high-performance engines used in trucks, buses, construction equipment, agriculture, and power systems.

The brand is widely respected for its innovation in clean diesel technology, including aftertreatment systems, turbochargers, and advanced electronics that help reduce emissions while maximizing engine efficiency and reliability.

Bosch Parts

View all

  • Visit our support center

    Expert help & advice

  • Check your order status

    Updates & tracking

  • Returns & exchanges

    All you need to know

  • Price-match guarantee

    Our promise to you