English
This 24V 50A alternator features a 78mm pulley (vs. 95mm in alternate variants), increasing alternator RPM at engine idle—ideal for Doosan excavators used in utility, landscaping, or municipal applications where extended low-speed operation is common. It ensures quicker battery recovery during trenching, pipe laying, or stationary hydraulic use on DX220, DX300, DX480, and related models.
It replaces the same OEM units as the 95mm version—including Doosan 2502-9009, WAI 12769N, Lester 12769, and Nikko 0-35000-4190—but the smaller pulley delivers ~22% higher output at 800 RPM idle, supporting auxiliary tools (e.g., hydraulic breakers, augers) without voltage sag.
Manufactured by SANYOU, this configuration prioritizes responsiveness over peak high-RPM efficiency—making it the preferred choice for contractors prioritizing uptime in stop-start duty cycles.
Mounting Dimensions
Specifications
OEM NO.
Applications
| Specifications | MFR | NIKKO |
| Voltage | 24 | |
| Amp. | 50 | |
| Grooves | 8 | |
| Pulley | 78 |
| Producer | Number |
| WAI | 12769N |
| LESTER | 12769 |
| DAEWOO | 2502-9007B, 2502-9009, 2502-9009FC |
| NIKKO | 0-35000-4190, 01-35-7000 |
KEEP IN TOUCH
Our factory specializes in producing starters, generators, and spare parts for automobiles, tractors, and internal combustion engines. We possess advanced production and processing technology, complete equipment, and rigorous testing methods. Through years of hard work and entrepreneurship, we have gradually developed into a company of considerable scale and strength. Our "Xiyun" brand has gained considerable influence in the industry, and our products are sold throughout China. Some of our parts are exported to the United States, Canada, Russia, Brazil, and other countries, enjoying widespread popularity and praise from users.
Our factory currently has fixed assets of over 5 million RMB, working capital of over 4 million RMB, covering an area of over 20,000 square meters, with a building area of over 12,000 square meters. We currently produce DC starters and AC generators for construction machinery. Our main equipment includes 2 large hydraulic presses, 5 medium and small hydraulic presses, over 30 machine tools such as lathes, grinders, and milling machines, and over 50 sets of various specialized testing equipment. We have over 60 employees, including 3 engineers, 5 technicians, and 9 full-time technical personnel. Currently, the factory has an annual production capacity of over 150,000 starters, over 200,000 generators, over 150,000 armatures, and over 150,000 electromagnetic switches.
Our factory has a sound organizational structure. The factory has five management departments: quality inspection, technology, production, sales and marketing, and finance; and three workshops: generator assembly, starter assembly, and machining. Various organizational management regulations and training plans are being further improved to ensure high-efficiency and high-quality production.
Our factory passed ISO9000 international quality system certification in December 2000, was rated as an AAA-level credit enterprise in 2001, and passed IATF16949 certification in 2023. Currently, our factory supplies main engine manufacturers including Shanghai Diesel Engine Factory, Nantong Diesel Engine Factory, Guiyang Diesel Engine Factory, Wuxi Power Engineering Co., Ltd., and Tianjin Power Machinery Factory. Our factory will steadfastly implement the principles of "quality first, customer foremost, strict management, and brand creation," providing our customers with superior products through sincere service and excellent quality.
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