Your air compressor serves your garage well for many months out of the year and helps you complete an array of different tasks. However, eventually these workhorses can go down, and when they do, you will definitely miss the help this piece of equipment provides. One of the best things you can do as the owner of an air compressor is to keep a basic air compressor repair kit for your specific model on hand. These kits can contain different things depending on where you buy them and for what model. In general, there are some basic commonalities where included parts are concerned with air compressor repair kits. 

Compression Piston 

The compression piston is perhaps one of the most important Sullair compressor parts of just about any standard air compressor model. This piston is what compresses to help with the production of pressurized air. Because the piston serves such an intrinsic purpose inside of the air compressor motor, it does work really hard. Therefore, the compression piston can be one of the first things to fail on your unit that will need to be replaced. Compression pistons not only come as part of a lot of repair kits, but they are also commonly included in air compressor rebuild kits as well. 

Gaskets and Seals

There are many different gaskets and seals inside of the motor and functioning parts of most air compressors. These gaskets and seals serve an array of purposes in the motor and the compressed air chambers. A few of the gaskets and seals you should expect to get with a repair kit include:

  • Unloader valve seals
  • Compressor motor gaskets for under the piston
  • Ring seals for the air chambers 
  • Ring seals for the air distribution line hook-ups

Many repair kits will come with multiples of the same types of rings and gaskets so you can have spare ones when they must be replaced. Gaskets and seals wear down with use and naturally deteriorate with exposure to the elements, so they frequently do have to be replaced. 

Unloader Valve

The unloader valve is responsible for eliminating excess compressed air as the air compressor powers down after it has been used. This is the valve responsible for ensuring the tank is also never over-full with air as well. A bad unloader valve is quite common, and the problem can be signified by telltale humming noises as the compressor eliminates excess air after a cycle.