1. Checking and Refilling Oil Level

1. Inspect the oil level using the sight glass.
2. If the oil level is low or abnormal, fill up the tank through the oil filling port.

2. Swapping Check Valves

1. Identify Check Valve 1 (front side) and Check Valve 2 (back side).
2. Swap the positions of Check Valve 1 and Check Valve 2 as marked in the image.
3. Reassemble securely and check if the issue is resolved.

3. Air Removal & Oil Filling During Valve Operation

1. If the problem persists, remove the plug on the unit.
2. Fill oil while the valve is operating (motor running) to ensure proper circulation.
3. Securely reattach the plug once the oil level is stabilized.

4. Troubleshooting Notes

• If oil level drops frequently, inspect for leakage in the system.
• Ensure check valves are clean and undamaged before swapping.
• Refill oil gradually to prevent air bubbles in the hydraulic system.