Which lubricants are suitable for different types of reducers?
1. For horizontal cycloid reducers, the standard lubrication method is oil immersion. The oil level should be maintained at the middle of the sight glass under normal operating conditions. However, in harsh environments or high-temperature situations, special attention should be given to oil selection and maintenance.
2. Cycloid pinwheel reducers typically use 40# or 50# mechanical oil under normal temperature conditions. To enhance performance and extend the life of the reducer, it's recommended to use 70# or 90# extreme pressure gear oil. It's also important to adjust the lubricant based on extreme temperatures, whether hot or cold.
3. When installing a planetary cycloid reducer vertically, it's crucial to prevent the oil pump from losing its oil supply, as this can lead to component damage. Proper oil management is essential in such configurations.
4. When refueling, turn the vent cap located on top of the base to add oil. To drain the oil, unscrew the drain plug at the bottom of the base. Note that the reducer is initially oil-free during installation.
5. After the first 100 hours of operation, it’s recommended to replace the oil and clean the internal components thoroughly before continuing operation. Oil should be changed every six months (based on an 8-hour workday). If the working environment is particularly harsh, the oil change interval can be shortened. Regular cleaning and oil changes—such as every 3 to 6 months—have proven effective in extending the reducer's lifespan. Also, make sure to replenish the lubricant regularly during use.
6. New reducers come pre-lubricated with grease, and it should be replaced every six months. The recommended grease is either aluminum disulfide 2# or 2L-2# lithium-based grease.
Lubricant Quality Levels
For diesel engines operating under low-speed, high-load, or high-speed, heavy-duty conditions, CE-grade oil is appropriate. Turbocharged engines require at least CD-grade oil. CF-4 is ideal for high-speed, heavy-duty, long-cycle engines, especially those used for highway driving, as it helps prevent piston ring wear and oil thickening. CG-4 is suitable when fuel sulfur content is below 0.05%, while CH-4 is recommended for engines with higher injection pressure and operating temperatures. CI-4 is required for engines equipped with low-temperature exhaust gas recirculation systems.
Compared to lower-grade oils, higher-grade lubricants offer better oxidation resistance, cleaner dispersion properties, and improved protection against valve wear, sludge buildup, filter clogging, and low-temperature pumping issues. These features contribute to longer engine life and better performance.
With increasing environmental regulations in China, many manufacturers have introduced high-performance, electronically controlled engines. As a result, the demand for higher-quality oils has risen. The CD grade has been phased out, and CF and CH grades are now widely used. Considering factors like heavy vehicle loads, poor road conditions, and unstable diesel quality in China, using high-quality oil is essential to avoid premature engine failure.
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