3689630 OEM Cummins Idler Gear Assembly Diesel ISX X15 Engine For Sale - New and Used

3689630 – Cummins OEM Idler Gear
This is a genuine OEM Cummins idler gear, engineered for precise timing control and long life in high-load diesel engine applications. Used in the gear train system of ISX and X15 engines, this gear ensures accurate valve timing and crank-to-camshaft synchronization.

• Part Number: 3689630

• Brand: Cummins

• Type: Idler Gear

• Application: Gear train system

• Material: Heat-treated alloy steel

• Fitment: Direct-fit OE replacement

Designed for extended durability under continuous load, heat, and vibration.

🟦 FITMENT DETAILS

Common Engine Fitment:

• Cummins ISX

• Cummins X15

• Cummins Signature 600

Common Truck Applications:

• Kenworth W900, T680, T880

• Peterbilt 389, 579

• Freightliner Cascadia (ISX/X15 equipped)

• International ProStar, LT

• Western Star 5700XE

🟦 FITMENT NOTE

ATTENTION!
If you're not sure about the part number you need, we're here to help.
To ensure you receive the correct part, please provide:

1. Year

2. Make

3. Model

4. Last 8 digits of the VIN
   – OR –
   Engine Serial Number (ESN)

We'll confirm compatibility quickly and accurately.

🟦 CONDITION

Brand new and unused. May ship in bulk or repackaged OEM format.
Factory-direct part – NOT aftermarket or reman.

🟦 SHIPPING & SUPPORT

• Fast shipping – ships within 1 business day

• Carefully packed for protection

• 30 day free returns on unused parts

• Seller pays return shipping

• Questions? Message us anytime — we respond quickly!

🟦 WARRANTY

Warranty coverage must be handled through an authorized Cummins dealer.
Seller does not process warranty claims directly.

🟦 LOAD RUNNER DIESEL SUPPLY

With over 15 years in the diesel parts industry, we have access to thousands of OEM and aftermarket parts for all major makes and models.
If you don’t see what you need — send us a message. We’ll track it down and keep your rig rolling.

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