107-7977 1077977 Caterpillar Alternator
107-7977 Caterpillar Alternator GP-Charging OEM 1077977 Fits 320B 325B D6N Parts
Product Information
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- Brand: Caterpillar
- Category: Alternators & Starters
- Part Number: 107-7977
- Part Name: Alternator GP-Charging (24V 70A)
- Alternative OEM: 1077977 / CA1077977 / 132-2156 / 0R8279
- Engine Model: Caterpillar 3116, 3126, 3126B, 3306, C9
- Compatible Equipment: Caterpillar 320B, 325B L, 330B L, 345B L Excavators; D5M, D6M, D6N, D6R Dozers; 950G, 962G, 966G Wheel Loaders
- Condition: 100% New Aftermarket Replacement
Product Function & Specs:
Heavy-duty 24-Volt, 70-Amp charging alternator built to withstand severe engine vibration and high heat. Features high-quality internal windings, durable bearings, and a robust regulator to deliver a stable electrical output. Keeps the machine battery charged and powers vital cab electronics, lights, and controller systems under continuous working loads.
Failure Symptoms:
- Battery continuously drains, or the machine requires regular jump-starts to run.
- Dim or flickering cab lights and instrument cluster displays during high-load operations.
- Dashboard battery charging indicator warning light stays on while the engine is running.
- Abnormal squealing or whining noises coming from worn-out alternator bearings.
Quick Installation Notes:
- Always disconnect the master battery switch or disconnect the negative battery terminal before starting installation.
- Inspect the drive belt and automatic tensioner for signs of cracking or wear; replace if necessary.
- Mount the alternator securely to its bracket and align the pulley correctly with the belt path.
- Ensure all electrical terminals and ground wires are clean, free of corrosion, and tightened firmly to prevent voltage drops.
FAQ:
Q: Can this part replace OEM 107-7977?
A: Yes, 100% interchangeable. Mounting bolt patterns, pulley dimensions, and the 24V 70A electrical specs match the original Cat assembly exactly.
Q: Is this an OEM or aftermarket replacement?
A: This is a premium aftermarket replacement alternator utilizing heavy-duty internal components for long-term service life. Equivalent performance at a much better value.
Q: Which machines are compatible?
A: It fits numerous Cat machines, including 320B and 325B excavators, D6M and D6N dozers, and 950G to 966G loaders. Send us your engine or machine serial number to double-check before ordering.
Q: Does this alternator include the pulley?
A: Yes, our alternator assemblies generally come complete with the drive pulley pre-installed and ready for belt mounting.
Q: Do you support bulk orders?
A: Yes. We offer wholesale rates for parts distributors, electrical repair workshops, and fleet maintenance yards. Contact us directly for bulk terms and shipping estimates.
Why Sourcing From WinsParts?
We match your part numbers directly against official parts catalogs to ensure a 100% correct fit. Our large physical inventory allows us to ship orders fast, minimizing your machine downtime with dependable parts.
Global Logistics & Secure Transit
We deliver high-performance construction machinery parts to wholesalers, repair shops, and operators worldwide. To minimize your machinery downtime, we offer flexible shipping options tailored to your urgency and budget:
Our Reliable Shipping Methods:
- Express Delivery (DHL, FedEx, UPS): 3–7 business days worldwide. Best for urgent orders (e.g., electronic controllers, injector nozzles, seal kits).
- Standard & Economy Shipping: 7–21 days depending on the destination. Ideal for cost-effective transit with full end-to-end tracking.
- Sea Freight & Air Cargo: Recommended for heavy assemblies such as complete engine blocks, hydraulic main pumps, and undercarriage track links.
Dispatch Timeline:
- Orders for in-stock items placed before 2:00 PM (GMT+8, Monday–Friday) are dispatched the same day.
- Later orders or customized orders will be shipped the next working day.
Critical Selection Reminder: Please make sure your Part Numbers match our product listings. If you are unsure, simply contact our engineering team via WhatsApp. We will cross-verify compatibility using official electronic catalogs (SIS/EPC) based on your machinery nameplate.
Payment Methods & Export Terms
To ensure a smooth B2B procurement experience, WinsParts supports multiple secure global payment methods:
- International Credit/Debit Cards: Secure online processing via Visa, Mastercard, and major global gateways.
- Digital Wallets: Fast and verified transfers via PayPal and Stripe.
- Bank Telegraphic Transfer (T/T): Recommended for large-scale wholesale orders. A formal Proforma Invoice (PI) containing our official corporate bank details will be sent via email upon order confirmation.
Export Customs & VAT Policy:
- All prices displayed on our website are exclusive of local VAT and destination import duties unless specified otherwise.
- Full shipping documentation—including Commercial Invoices, Packing Lists, and Certificates of Origin (CO)—is provided with every shipment to ensure seamless customs clearance in your country.
Gz Wins Construction Engineering Co., Ltd. is a premier manufacturer and global supplier specializing in the diversification of engineering machinery parts. With over a decade of industry expertise, we integrate development, production, and professional marketing to provide a one-stop solution for the world’s most demanding machinery brands.
We don’t just sell parts; we manage reliability. Our products are rigorously tested and successfully exported to America, Europe, Southeast Asia, the Middle East, and Africa. We pride ourselves on maintaining a massive inventory that ensures your machinery downtime is kept to an absolute minimum.
Strategic Brand Specialization
We are the preferred choice for heavy machinery operators who prioritize uptime and performance. Our inventory is specifically optimized for:
KOBELCO Excavators: * Unrivaled stock of Genuine Engine Components series.Full range of Hydraulic Pump & Valve solutions to restore factory-speed operation.
HITACHI Excavators: * Comprehensive parts support for Zaxis series, from ISUZU engine internals to advanced electronic controllers.
Why Professional Buyers Choose Us:
Technical Match Precision: We use official parts catalogs to ensure 100% compatibility based on your machine’s serial number.
Global Supply Strength: Specialized export experience to America, Europe, and the Middle East ensures smooth logistics for your KOBELCO and HITACHI parts.
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