GENMA Maintenance · Hydraulic System | Filter Change: Small Part, Big Impact

Contaminants in hydraulic oil are a leading cause of system failure. The filter is your first line of defense — it traps dirt and debris before they cause damage. But filters clog over time. When that happens, either the bypass valve opens (letting unfiltered oil through) or the filter element bursts. Either way, contaminants get into your system.

When to change the filter

According to the GENMA manual:

•  Return filter: every 750 hours (first change at 250 hours after filling)
•  Air breather filter: every 750 hours (first change at 250 hours)

Signs it’s time to change

• Filter clogging warning light on the dashboard (if equipped)
•  Unusual pressure drops or sluggish machine response
•  Simply reached the scheduled interval — even without warnings

Quick steps
1. Stop and depressurize — shut down the motor, let oil cool below 40°C, and ensure pressure drops to zero.
2. Clean the filter cover — keep dirt out of the tank.
3. Remove the old filter — use the proper tool, carefully take it out.
4. Wipe the housing clean — a lint-free cloth works well.
5. Install the new filter — use a GENMA-approved element and check the O-ring.
6. Tighten and test run — start the machine, run for 2 minutes, and check for leaks.

Regular filter changes are one of the simplest and most effective ways to protect your hydraulic system. Stick to the schedule — your system will thank you with long, reliable service.