GENMA Maintenance · Lubrication System | Hydraulic Oil: 3 Don'ts

If the hydraulic system is the “vascular system” of a GENMA machine, then hydraulic oil is its “blood.” To keep that blood healthy, remember three rules: No mixing. No contamination.  No overdue. Let’s break them down.

1. Why no mixing?

Even if two hydraulic oils have the same viscosity grade but come from different brands, their additive packages may differ. Mixing them can trigger chemical reactions that:

•    Form precipitates, clogging filter elements
•    Break down additives, leading to oxidation and corrosion
•    Reduce foam control, causing cavitation

2. New oil still needs filtration

Whether you're topping up or doing a full change, never pour new oil directly into the system. New oil can pick up contaminants during transport and storage. Always filter it through a unit with the correct micron rating before it goes into the tank.

3. Change intervals and quantities

According to the manual, hydraulic oil should be changed every 2,000 hours (the first change may vary by operating conditions). Total system volume is approximately 2,000 liters (check your specific model). When changing, be sure to clean the tank thoroughly. Also keep in mind:

•    Top up when the level drops below the MIN mark
•    Add oil through the filler strainer or an external filter pump
•    Run the system for 2 minutes, then recheck the level

No mixing. No contamination. No overdue. Stick to these three rules, and your hydraulic system will run reliably for the long haul.