Adding hydraulic oil to your band saw is essential for keeping it running properly. The key steps are simple: choose the right oil, fill to the correct level, and keep everything clean.

Below are the detailed steps and key points.

Preparation: Choose the Right Oil and Quantity

• Oil Selection: Most band saws use ISO VG 32 or 46 anti-wear hydraulic oil. As a general rule: use VG 32 in winter (better low-temperature fluidity) and VG 46 in summer (better viscosity stability at high temperatures). Some power hacksaws may require ISO VG 20 machine oil. Always check your equipment manual to be sure.

• Checking Oil Level: Locate the sight glass (transparent round window) or dipstick on the side of the tank. Fill until the oil level is between the maximum (H or top line) and minimum (L or bottom line) marks. Be careful not to overfill.

 Procedure: Adding the Oil Correctly

1. Safety Shutdown: Be sure to turn off the main power supply to the band saw to prevent accidental startup.

2. Clean the Fill Port: Before opening the fill cap, wipe away any chips, dirt, or oil residue from around the cap to prevent contaminants from falling into the tank.

3. Add New Oil: Pour the prepared hydraulic oil slowly through a clean funnel or directly into the tank. Keep an eye on the oil level indicator as you pour.

4. Check and Finish: Once the level is correct, tighten the fill cap securely. If you have just changed the oil or there might be air in the system, briefly jog (bump) the hydraulic pump motor to allow the oil to circulate, then recheck the level and top up if necessary.

attention：

• New Saws – First Fill: New band saws are typically shipped with an empty tank and require a first fill of oil.

• Regular Changes: It is recommended to completely change the hydraulic oil 6 months after first use. After that, change it annually or every 6–12 months. If the oil appears milky (contaminated with water) or black (contaminated with debris), change it immediately.

• Daily Checks: Get into the habit of checking the sight glass or dipstick before starting the machine each day. This is an effective way to protect the hydraulic pump.

• Keep It Clean: The most important rule during the entire process is to avoid contamination. Even a tiny metal chip can cause a hydraulic valve to jam. Keeping everything clean is critical.

Once you understand the key points of selecting the correct oil and maintaining the proper oil level, adding oil to your band saw is straightforward. Regular attention to keeping the oil circuit clean will keep your equipment running reliably.