Electrical Parts
Cummins 6BT Alternator 24V 70A 3935530 | Heavy Duty Engine Charging System
- Part No.
- 3935530
- Category
- Electrical Parts
Send OEM number, quantity, destination, or photos. We will reply with quotation, lead time, and fitment notes.
Electrical Parts
Send OEM number, quantity, destination, or photos. We will reply with quotation, lead time, and fitment notes.

This is a premium, heavy-duty 24V 70A alternator, part number 3935530, specifically engineered for the Cummins 6BT diesel engine platform. Designed as a direct replacement for your machinery’s charging system, this unit ensures a stable power supply for starting and electrical loads. We ship globally, serving major industrial markets in North America, Europe, Southeast Asia, and the Middle East, ensuring fast delivery to ports and inland warehouses.
| Specification | Detail |
|---|---|
| Part Number | 3935530 |
| Type | Alternator |
| Voltage | 24V DC |
| Current Output | 70 Amps |
| Rotation | Clockwise (Standard) |
| Pulley Type | Single Groove V-Belt |
| Connector | Standard Dual Plug |
| Weight | Approx. 7 kg |
This alternator is a direct replacement for the following OEM numbers:
Note: Always cross-reference the connector type and mounting bracket configuration with your original part before purchase.
This alternator is primarily compatible with the following engine and equipment models:
We are a dedicated supplier of heavy-duty engine parts with extensive export experience. Our logistics network ensures efficient delivery worldwide.
1. Will this alternator fit my Cummins 6BT engine?
This alternator (3935530) is the standard 24V 70A unit for the 6BT platform. However, we recommend verifying your original alternator’s mounting bracket style and plug connector to ensure a perfect physical and electrical fit.
2. What is the installation process?
Installation is straightforward for a qualified mechanic. Disconnect the battery, remove the belt, unbolt the old alternator, and install the new unit using the same hardware. Reconnect the wiring harness and battery, then test the charging voltage (should be approx. 28V at idle).
3. How do I maintain this alternator for long life?
Regularly check the drive belt tension and condition. Ensure all electrical connections are clean and tight. Avoid exposing the alternator to excessive water or steam cleaning. If the charging warning light appears, have the system tested promptly.

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.
2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.
3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.
4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.
5. Scientific ERP system, easy and fast to locate the parts that customer needs.
6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.


1. Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).
2. Once we get confirmation of payment, we will ship products in 2 days.
3. Our packaging is standard export wooden box or others as your requirement.
4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.
A: Normally we can supply any quantity if we have in stock.
A: We accept Western Union, T/T, Paypal.
A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.
A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .
A: In the beginning , We will communicate with clients in details to understand what they need .
Before packing , We will check the products and send photos to clients .After confirmation ,
We will packing products well to avoid damage . Once we get tracking number ,
We will send it to customer and keep contact in with clients .