Fixing a Trash-Day Air Compressor - Craftsman 1HP 7 Gallon
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- เผยแพร่เมื่อ 27 ก.ย. 2024
- I picked this Craftsman branded 1HP 7 Gallon Air Compressor (model 921.166390) off the curb on trash day. Let's see what's wrong with it
Replacement Parts Used (affiliate):
Pump Gasket Kit -- p/n E100959 -- amzn.to/3MNGYea
Fel-Pro Rubber-Fiber Gasket Sheet -- p/n 3157 -- amzn.to/4e64jUg
Midwest Air Technologies, Sanborn, Powermate Compressors, initial inspection, troubleshooting, not compressing, doesn't compress, low tank pressure, remove fan shroud, how an air compressor works, remove cylinder head, inspect gaskets, how air compressor valve block works, make new gasket, reassemble valve block, reassemble cylinder head, test run
#troubleshooting #smallenginerepair #smallengine #aircompressor #aircompressors
Someone gave me a Craftsman 20 gallon 3/4 HP compressor from the 1980's, it wouldn't build pressure above 60 psi. I replaced the pressure switch, no change. Took everything apart and it all looked fine, reassembled it, no change. So eventually, after a few months of fiddling around with it and getting nowhere, I spotlessly cleaned up the reed valves and installed a new head gasket and it runs like brand new now. I was blown away at how good it works now. It has no leaks at all, I can leave it on for days and the motor never comes on once to refill itself, until I used it of course. Now all I need to do is give it a new paint job, it sorely needs one. So to everyone out there, don't be afraid to take on the task of rehabbing curb finds, most people are lazy and would rather just buy a new one, no matter how minor the defect that made it stop working.
That compressor does not have an engine, it has a motor.
Oxford says today the words are synonymous
People also ask
Are motor and engine the same?
In the early 19th century, the meanings of motor and engine had already begun to converge, both referring to a mechanism providing propulsive force. “The first recorded use of 'engine' to mean an electrical machine driven by a petroleum motor occurs in 1853,” says Fuller. Today, the words are virtually synonymous.
Ah, the good O'l days of actually fixing things! Very nice.....
This is my kind of repair!! I love to find stuff on the curb and repair it with simple stuff. Good Job. I use to think doing this was a waste but as the years go by I appreciate having the skills and tools. Thanks Dad.
Here's a tip: when filling the tank with air, turn your line pressure off to show zero air in the gauge. You'll find it's much easier to attach the hose to the air chuck.Then turn your pressure gauge valve to your desired pressure.
My one comment would be before disassembling just take a marker and draw a line from the head to the base marking the plates so you don't have to guess their orientation but I guess since you had a recording you could always go back & review their orientation.
So, the device you keep calling an engine isn't an engine, it's a positive displacement pump of the reciprocating kind and with the exception of the lubrication system and the fact that it uses a piston, crank, connecting rod and a wrist pin, that's where the similarities end. It uses reed or check valves as opposed to rotary, poppet, sliding or the piston as a valve like you would see in internal and external combustion reciprocating engines. That said, this machine could be converted into a rudimentary internal combustion engine or steam engine like you can convert an internal combustion or steam engine into a pump. Though, in either case it takes a good amount of modification to do so.
Onto the next part, these machines are relatively easy to fix and I have two of these in various configurations and my brother has another one that seized up once but I was able to get it running again with time, heat and lubrication. When I owned his before I gave it to him, I had to make a new set of gaskets as it had the problem of spraying oil all over the place. EDIT: I should add that I also used a thin film of RTV silicone between the gaskets and the metal surfaces.
Excellent!!!!! Sure glad I found your channel!
I have this compressor. No issues other than the brutal loudness. I wear hearing protection if I'm going to be within 50ft of it. I added an extended drain with a ball valve and pipe to make draining condensation from the tank easier, which you should do every day of use. I also added a water separator to the output. I'd like to add a thick channeled box to the intake to help with the noise. And maybe a small cheap radiator to remove condensation *before* it goes into the tank. Make sure you change the oil on this compressor of unknown provenance.
Very nice explanation!! Thanks for sharing your analytic process! Saludos from Mexico 🇲🇽
Now trigger the drain valve and see what comes out....
there may have been standing water in the bottom of the tank...
and the tank is rusted out and unsafe...on the inside!
Take the drain valve out completely and use an inspection camera to check for the extent and the depth of the rust....
Good educational video, thanks, thumbs up & I subscribed, cheers !
09-2007 ,,,,,,,,,,,17 years old wow really nice shape ,,my thinking was is there any water that needs drained ,,and also you found a good one for sure
Nice work, always good to have a small portable compressor around!
Glad to see you learned some of the proper terms for an air compressor which is not even close to being the same as a gas engine.
20 minutes and a piece of paper. Nice.
Good video!
Great job, I was given a similar scrap compressor last year. Mine needed a new set of piston rings too.. I don't take it up to full pressure as I don't fully trust the condition of the tank..
Well, if he and the previous owner are smart enough, blow the whole thing down after each use through the bottom drain valve and leave that valve open. Storing it in your house is actually a better idea than in a shed due to the house having an HVAC system, especially in an area with a continuous drain dehumidifier like your basement. If you are using it, maybe using it outside from a longer distance.
I know a little bit about this kind of maintenance because I grew up using a Rainbow cleaning system, a machine that you set up before vacuuming that uses water that is emptied after each use or when dirty and refilling. Afterward, the machine requires some storage maintenance like removing the water basin, drying the basin, the machine's separator and storing it apart. With the model I grew up with this was essential to keeping the motor in good working order as it had a third bearing between the separator and fan assembly that could corrode and cause a drop in efficiency. and overheating.
Good job, but make sure the tank has no water build up in it, and rust, if that thing explodes it can be deadly, I wouldn't have it in my house, keep it in a outside shed to be extra safe.
It is very true that you should empty out the water, but the chances of it exploding due to rust are very small, it usually just develops pinhole leaks which bleed off the air pressure.
@@jimthesoundman8641
17 years of standing water...very thin tank?
@@jimthesoundman8641
17 years of standing water...very thin tank?