ATG20990 Alternator 123951-77200 101211-2990 12V 40A for John Deere 50G Excavator Takeuchi Yanmar 4TN78T Engine-Products-TIANGUAN-Page 1

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ATG20990 Alternator 123951-77200 101211-2990 12V 40A for John Deere 50G Excavator Takeuchi Yanmar 4TN78T Engine

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PRODUCT DETAILS

ATG20990 Alternator 123951-77200 101211-2990 12V 40A for John Deere 50G Excavator Takeuchi Yanmar 4TN78T Engine

OEM / Cross Reference Numbers: 123951-77200 / YM123951-77200 / 101211-2990 / 101211-2991 / 101211-2992

Product Description

ATG20990 Alternator is a high-quality aftermarket replacement designed for John Deere 50G excavators, Takeuchi compact equipment and Yanmar 4TN78T diesel engines. It replaces OEM numbers 123951-77200 and 101211-2990, providing reliable charging performance and stable electrical output for compact construction machinery.

Featuring a 12V 40A charging system, this alternator adopts a Denso-type design with internal fan, internal regulator and 1-groove pulley, delivering dependable battery charging performance for excavators, loaders and industrial equipment operating in demanding environments.

Feature	Details
Part Number	123951-77200 / 101211-2990
Application	John Deere 50G Excavator Takeuchi Equipment Yanmar 4TN78T Engine
Voltage	12V
Brand / Unit Type	Denso Replacement Alternator
Fan	Internal
Regulator	Internal
Grooves	1
Mounting Ear 1	M8-1.25 Threaded
Mounting Ear 2	10.4 mm Unthreaded
Cross Reference Part Numbers	NIPPONDENSO: 101211-2990, 101211-2991, 101211-2992, 1012112990, 1012112991, 1012112992 YANMAR: 123951-77200, 12395177200, YM123951-77200, YM12395177200
Weight	3.8 kg
Condition	Brand New, High-Quality Aftermarket

Weight & Package Information

Item	Specification
Net Weight	3.8 kg
Gross Weight	4.5 kg
Package Size	30 × 28 × 25 cm

PRODUCT HIGHLIGHTS

Product Highlights

Feature 1	Feature 2	Feature 3
12V 40A Stable Charging Output	Direct Replacement for 123951-77200 / 101211-2990	Designed for John Deere & Takeuchi Equipment
Denso-Type Reliable Design	Internal Regulator & Fan Structure	Fits Yanmar 4TN78T Engine Applications

SHIPPING

Item Details

Processing Time Orders are processed within 1-3 business days after payment confirmation

Shipping Methods DHL/UPS/ FedEx/ TNT/ Air Freight/ Sea Freight

Estimated Delivery Time Express shipping: 3-7 business days, depending on destination

Packaging Export-standard cartons with protective inner packing

Tracking Tracking number will be provided once the order is shipped

Shipping Cost Calculated based on weight, dimensions, and destination

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WARRANTY POLICY

All new aftermarket parts come with a 1-Year warranty. Quality is the first thing we consider. Check out our Warranty Assistance for more details.

SHIPPING POLICY

We offer express and standard shipping options to ensure your off-road machine gets back in action—fast and reliably. For more details, please visit our Shipping Policy .

EASY RETURN POLICY

We prioritize your satisfaction. If your order doesn't meet your expectations within 90 days, you may be eligible for a refund. See our Easy Return Policy for details.

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