When cleaning the F77-Y3KW-4P-NA80-M4 reducer bearing seal, the key to avoid damage is to select the right cleaning agent, control the cleaning intensity, and standardize the operating process. The specific operation points are as follows:

1. Selection and use of cleaning agents

‌Avoid highly corrosive solvents‌: Give priority to kerosene, gasoline or special metal cleaning agents. Grease containing solid additives is prohibited to prevent the seal material from being corroded or accelerating aging.

‌Pay attention to compatibility‌: If you need to replace the cleaning agent, be sure to confirm its compatibility with the old lubricant first to avoid chemical residues that may cause seal deformation.

2. Cleaning operation specifications

‌Gentle treatment‌: Use a soft brush or cotton gauze to remove surface oil stains to avoid scratching the sealing lip with the metal brush.

‌Control the soaking time‌: Operate according to the instructions of the cleaning agent to avoid expansion or deformation of the seal caused by long-term soaking.

‌Rinse thoroughly‌: After cleaning, rinse away the residue with clean water or compressed air to prevent chemicals from corroding the seals.

3. Inspection and protection before installation

‌Check the seal‌: Before installation, make sure there are no burrs or cracks, and there is no rust or debris in the seal groove. If necessary, use fine sandpaper to polish the shaft end to Ra≤1.6μm.

‌Lubrication protection‌: Apply lithium-based grease on the sealing lip and shaft end to reduce assembly friction and prevent lip tearing.

4. Installation precautions

‌Use special tools‌: Use an oil seal sleeve to apply force evenly during installation to avoid deformation or misalignment caused by hammering.

‌Control coaxiality‌: Ensure that the coaxiality deviation between the shaft and the seal is ≤0.05mm to prevent radial runout from accelerating wear during operation.

5. Daily maintenance suggestions

‌Regular inspection‌: Clean the respirator filter every 3 months to prevent excessive internal pressure from extruding the seal.

‌Environmental protection‌: In rainy season, fluorine rubber (FKM) or silicone sealing rings are preferred, and waterproof sealant is applied to the sealing gap.