3901774 | Genuine Cummins® Flywheel Ring Gear

SKU: 3901774 MPN: 3901774

Engine cranking precision depends on the Flywheel Ring Gear from Genuine Cummins, provided new and identified by Part Numbe: 3901774 for B-Series applications, with 159-tooth design, 10/12 pitch and maximum 2920 RPM capability.

$299.00
No Core Charge
8 in stock, ready to ship

Pickup available at Warehouse - Howard st 7092 ste F

Usually ready in 24 hours

Need it fast? We offer overnight shipping

Contact us to check if overnight next-day delivery is available for your order - PN: 3901774

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Product Description

Product Name Flywheel Ring Gear Product Name Flywheel Ring Gear
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 3901774 Part Number 3901774
Engine Compatibility
Cummins B-Series Cummins B-Series
Specifications
Maximum RPM 2920 Maximum RPM 2920
Ring Gear Pitch 10/12 Ring Gear Pitch 10/12
Ring Gear Tooth Count 159 Ring Gear Tooth Count 159

Useful Information

Description and Purpose:

Designed for installation on the flywheel perimeter, this new Flywheel Ring Gear from Genuine Cummins, Part Number: 3901774, provides precise starter engagement for reliable engine cranking in Cummins B-Series applications, featuring a 10/12 pitch gear with 159 teeth and supporting operation up to 2920 RPM. The gear ensures consistent interaction between the starter pinion and the flywheel during engine start cycles.

Why Replacement is Important:

Starter engagement places repeated stress on the ring gear teeth, which can eventually cause wear, chipping, or uneven contact that interferes with normal engine cranking.

Impact on Vehicle Performance:

Replacing a worn ring gear helps restore proper starter interaction, ensuring consistent engine starts and reducing the likelihood of grinding or misalignment during ignition.

Manufacturer Information:

Cummins® is known for producing reliable diesel engines and components designed to support long service intervals and dependable operation in demanding commercial environments. 

Tags & Category: Ring Gear, Flywheel Gear, Starter Ring Gear, Flywheel Ring, Engine Ring Gear, Cummins Ring Gear, Starter Gear, Flywheel Component, Engine Gear, Truck Ring Gear

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 3901774