Question about Craftsman Air Tools & Compressors
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Posted on Jan 02, 2017
SOURCE: air compressor won't run
Don't run it with the head off! the cylinder will just up and down with the piston and ruin the seals again. I have three Craftsman compressors in my shop and I've torn them all down at least twice. Rather than pay for the kit, I went to NAPA and got a roll of cork gasket material and made my own seals. They don't last as long but they work great.
I'd be willing to bet your seal it just too tight. I made this mistake the first time around too. it's not a very good design as the piston tilts through the stroke. I would try putting a light coat of heavy weight oil on the cylinder wall and move the piston by hand to lube the seal.
Posted on Dec 17, 2008
Your compressor is made by Porter Cable. You can use sears parts or takes your old parts to a local Dewalt service center and they will match them up with replacements. You can save some money on the bearing by using a generic. Universal bearing number will be found on the dust shield. Most likely the sears part numbers will be the same as porter cable. Dewalt service center will help you with other questions and or instructions. Good Luck!
Posted on Oct 18, 2009
check valve plate and gasket for anything broken, also when you installed the piston into the cylinder did you push it up from the bottom? if the sealing ring is installed with it folded down towards the crankshaft will allow air to blowby, it needs to be facing up to pump correctly.
Posted on Nov 26, 2009
I assume you have removed the valve head-valve plate-cylinder assembly from the base and pistons. Remove the four bolts holding the bearing cap assembly on one side of the crankcase and remove the cap. You have to pull on the crank to get the crank bearing out of the opposite side of the crankcase. Move the crank forward and turn it until the rear bearing will clear the crankcase and the whole thing will tilt and come out the top. Campbell sells the entire crank, con rods, pistons & rings as an assembly under part number VT040600AJ. This is the best way to go as they don't have con rods to go on the crank if you were to get the journals turned down. NOTE: During reassembly, the bottoms of the cylinders have a taper so you don't need a ring compressor to get the pistons in the cylinders. Just be sure the oil rings are in properly before pushing the cylinder all the way down. The thin oil scrapper rings have a tendency to fold over and get caught between the piston and cylinder.
Posted on Jan 30, 2012
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