Archive for August, 2012
In this video I rebuild my Craftsman oil free air compressor for ~$47 USD. This is a ~12 year old compressor that could no longer get up to pressure and would have cost over $350 to replace. Well that was the cost over 12 years ago. I couldn’t find a 5 HP 30 gal model like this on the market anymore. The only 5HP models were over $1000 and more gallons.
You can also find another good Craftsman air compressor rebuild video of a smaller model here: http://www.youtube.com/watch?v=zUw7r0fJqIc
My compressor is a 5HP 30gal model 919-165300 and I was able to get the rebuild kit from http://www.searspartsdirect.com
You will need a long Torx T20 driver if you don’t want to hack up your cover like I did.
You can find your Craftsman model number affixed to the side of your compressor. You type this model number into the web page and select search by model number. Then pick your rebuild kit which should come with the piston, cylinder sleeve and new rubber rings. Not all these bits may be bad on your compressor but if you’re taking it apart why not replace all the ware parts for one kit price.
Unplug your compressor, drain all the air and take off the plastic cover. I had a dog of a time with my plastic cover but you can watch the video if you want to hear more. Then remove the fill pipe.
This is the top of the cylinder head. The large side is the intake and the smaller side is the compression exhaust side.
Below is the top of the valve plate assembly and it is what controls the in/out of the air flow as the piston compresses the air. The valves open and close as air is sucked in and then compressed out into the tank.
And this is the bottom of the valve plate.