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SL-81MAG / M21

General Welding Consumables · Welding Consumables

Technical data from manufacturer or class sources · not yet verified by a person
X-Band / S-Band, IMO SOLASCapacity
Electromagnetic RadarMedium

This radar system operates on the principle of electromagnetic waves in the X-Band and S-Band frequencies, adhering to the International Maritime Organization's Safety of Life at Sea (SOLAS) regulations. The SL-81MAG / M21, manufactured by Hyundai Welding Co., Ltd. in Pohang, is designed to provide reliable navigation support for maritime vessels. Certified under DNV approval, this radar system ensures compliance with stringent maritime safety standards. Common issues include magnetron failure after 5,000 to 8,000 hours of operation, bearing damage to the antenna rotation motor after 30,000 hours, and display backlight failure. Regular maintenance tasks include replacing the magnetron at the specified interval and lubricating the antenna bearing annually. Additionally, the system requires a weekly performance test as per IMO requirements and an annual inspection to ensure optimal performance. Spare parts, such as a spare magnetron for magnetron models, should be kept on board with a lead time of 1 to 3 weeks.

Service

Service notes.

What our service work and the manufacturer documentation say about keeping this model running.

Magnetron replacement every 5,000-8,000 hours. Antenna bearing lubrication annually. Weekly performance monitor test (IMO requirement). Annual inspection.

Inspection

Common failures & inspection points

Spares

Replacement Parts

Spare parts notes

Hyundai Welding Co., Ltd. (Pohang): Keep a spare magnetron on board (on magnetron models). Lead time: 1-3 weeks.

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