Do I need to replace the filter screen when changing the gearbox lubricant

When replacing the lubricant of the gearbox, it is recommended to check the filter screen together. If it is dirty, blocked, damaged, or aged, it must be replaced. If it is normal and clean, it can continue to be used. The core judgment criteria are as follows:

1、 The situation where the filter screen must be replaced

Filter blockage, deformation, damage, and metal wire detachment

The lubricating oil is severely contaminated, blackened, and contains a large amount of metal debris

The equipment has not been maintained for a long time and has exceeded the oil change cycle

Has experienced bearing/gear wear, abnormal wear, and water ingress emulsification

2、 The situation where it cannot be replaced temporarily

The filter screen is clean, transparent, and free from deformation or damage

The oil quality is good, only the oil is changed regularly

The equipment is running normally without any abnormal wear and tear

3、 Practical advice

At least remove the filter screen, clean and inspect it every time the oil is changed

Batch/important equipment, high load conditions, it is recommended to replace the filter screen directly with a new one every time the oil is changed

Before reinstalling the filter, ensure that there are no impurities, it is installed in place, and the seal is intact

Simply put, regular maintenance can be cleaned and reused, and can be replaced directly if the working conditions are poor or the oil is dirty. The cost is not high, but it can greatly protect the gears and bearings.