12V 40A Alternator 0R9996 7N4784 7N4787 Fits Caterpillar Cat 931B 3204 1979 - 1988
12V 40A Alternator 0R9996 7N4784 7N4787 Fits Caterpillar Cat 931B 3204 1979 - 1988 is backordered and will ship as soon as it is back in stock.
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Powering 10,000+ Commercial Fleets
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One Year Warranty
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Easy 60-day Return
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Expert support & Fitment Guarantee
Compatibility Information
| Make | Fits Caterpillar |
|---|
Description
Description
12V 40A Alternator 0R9996 7N4784 7N4787 Fits Caterpillar Cat 931B 3204 1979 - 1988
Maintaining heavy machinery at optimal operational efficiency is essential for minimizing downtime and ensuring consistent productivity in demanding environments. This 12V 40A alternator is engineered to meet OEM specifications, providing reliable fit and durability for construction and industrial equipment.
Compatible Part Numbers
- Caterpillar: 0R9996, 7N4784, 7N4787, 7N6118, 0R-9996, 7N-4784, 7N-4787, 7N-6118
- Denso: 021000-7360, 021000-8420, 100211-0010, 100211-0230
- Lucas: A8114, A8115
- Real: 20132101
- Remy: DRA2601
Specifications
- Voltage: 12V
- Amperage: 40A
Compatible Engines
- 3204
Compatible Equipment
- Caterpillar Track Loaders: 931B, 931B LGP, 931C, 931C LGP, 931C Series II, 931C LGP Series II, 931C & 931C LGP Trash Loaders, 935B, 935C, 935C Series II, 935C II
- Caterpillar Tractors: D3B, D3B LGP, D3, D3C, D3C LGP, D3C LGP Series II, D3C & D3C LGP Series II, D4B, D4C, D4C LGP, D4C LGP Series II, D5C, D5C LGP
- Caterpillar Wheel Loaders: 910, G910
- Caterpillar Integrated Toolcarriers: IT12
This alternator is a new aftermarket component designed to deliver dependable electrical performance for Caterpillar equipment manufactured between 1979 and 1988. It is compatible with multiple machine configurations including power shift and direct drive systems, ensuring versatility across various operational setups. The product supports a wide range of Caterpillar models powered by the 3204 engine, making it a practical replacement part for maintenance and repair operations.
Precision manufacturing and quality control ensure that this alternator meets stringent industry standards, providing consistent voltage and current output necessary for the reliable operation of heavy machinery electrical systems. Its robust construction is suitable for the harsh conditions typical of construction, mining, and agricultural environments.
By selecting this alternator, operators and maintenance professionals can expect a component that integrates seamlessly with existing systems, thereby preserving equipment longevity and operational efficiency. The compatibility with original part numbers from Caterpillar and other manufacturers like Denso, Lucas, Real, and Remy further guarantees interchangeability and ease of installation.
1 Year Warranty
1 Year Warranty
Fab Heavy Parts is excited to offer a 12-month warranty on all new replacement/aftermarket parts starting from your original purchase date.
Enjoy peace of mind with Fab Heavy Parts!
For more warranty details, please check out our warranty policy.
Fast Delivery
Fast Delivery
Estimated delivery time 3-6 workdays
No Core Charge
No Core Charge
We don't have a core charge for any products.
Frequently Asked Questions
Do you ship to the UK?
Yes, we ship to mainland UK, Scotland, Wales, and Northern Ireland. Shipping rates and estimated delivery times are displayed at checkout.
Will I be charged import duties or VAT?
Our prices do not include VAT or import duties. UK and European customers are responsible for any applicable import taxes, VAT, and customs fees charged upon entry into their country. These charges vary depending on the commodity code, order value, and destination country. We recommend checking with your local customs authority or HMRC (for UK customers) before placing your order.
How long will delivery take to the UK?
Standard delivery to UK addresses is typically 4–7 business days from dispatch. Express options may be available at checkout. Customs clearance can add 1–3 additional business days in some cases.
Are your parts compatible with UK and European specifications?
Many of our engine, hydraulic, and powertrain components are compatible with EU and UK-market machines. Please verify the part number against your OEM manual or machine serial plate before ordering. Contact us with your machine make, model, and serial number if you need fitment confirmation.
What currency will I be charged in?
UK customers are billed in GBP (£).
What is your returns policy for UK orders?
We accept returns within 30 days of delivery for unused parts in original packaging. UK customers are protected under the Consumer Contracts Regulations 2013, which grants a 14-day right to cancel an order before it has been dispatched. Once an order has been fulfilled and shipped, standard return terms apply. Return shipping costs for non-defective items are the buyer's responsibility.
How do I verify a part number before ordering?
Each listing includes part numbers and compatible machine models. Cross-reference with your OEM workshop manual, or contact our technical team via the contact form with your machine make, model, year, and serial number.
Do you offer trade accounts for UK buyers?
Yes. UK trade customers can apply for a B2B account to access volume pricing and dedicated account support.
What payment methods do you accept?
We accept all major credit and debit cards including Visa, Mastercard, and American Express. We also support PayPal, Apple Pay, and Google Pay at checkout. For B2B and trade customers, bank transfer (BACS) and net payment terms may be available upon account approval — please contact us to discuss your requirements.


