1. Park the forklift on level ground and engage the parking brake.
2. Locate the differential fluid fill plug. It is usually located on the side or top of the differential housing.
3. Clean the area around the fill plug to prevent contaminants from entering the differential.
4. Remove the fill plug using the appropriate tool.
5. Insert the end of the fluid transfer pump into the fill hole.
6. Pump the differential fluid into the differential housing until it reaches the bottom of the fill hole.
7. Reinstall the fill plug and tighten it securely.
8. Lower the forklift and test the differential fluid level by operating the forklift for a few minutes. If necessary, add more fluid until the level is correct.
