Vari-Air Recommends the following maintenance for your airlock:

Pre-Season:

• Check the oil level on the gearbox.   If low, replace with 75W90 synthetic oil. 
• Check chain tension.   If loose, adjust chain tension to remove any slack.
• If chain looks dry, spray with a chain lubricant.
• Visually inspect airlock for rust and debris.  If rust or debris are present – spray with rust preventative coating, such as vegetable oil.

Post-Season (long term storage over 30 days):

• If possible, cover the airlock to prevent debris and moisture from getting into the internal components.
• Spray the internal carbon steel surfaces with a rust preventative food-grade oil such as vegetable or mineral oil, to prevent internal rust from forming.
• Turn the rotor every 30 days while in storage.

If you are not getting performance from your airlock, it may need to be rebuilt

• After 1 million bushels and/or if tolerances are over .012, your airlock should be rebuilt.

What happens when my airlock is rebuilt? 
During rebuilding, the process involves removing the rotating vanes and using a lathe to apply a weld bead across the top of each vane. The weld spot is then machined down to restore proper clearances. Additionally, bearings and packing are replaced.

Can Vari-Air rebuild my airlock? 

We do not rebuild airlocks, but recommend you work with our partner:

• Rotary Airlock (https://www.rotaryairlock.com/)
• Phone:  815-626-0388