Junk Air Compressor, can we fix it?

tear down of the compressor head is here, https://www.youtube.com/watch?v=bEgSpDZ1Vwg

I'm curious how the old one looks inside. Please take it apart! :-)

You have to tear down the bad compressor assy so we can see what failed... Happy Easter and great show as always!

I've got a "fittings box", it has every single type and size of fitting you can imagine. Except the one I happen to be looking for.

Hey Mustie, I have to say thank you!! You have inspired me to get old junk up and running like new again. So far I have resurrected a 2002 XR80R, a 1973 ATC70 and I am working on 2 Yamaha Maxims (1980 and 1981)... And this is just in the last few months. I have always loved tinkering but now I am making something good out of it all.

Of COURSE we have to see inside! :) Just cuz!

The ten year old boy in me just burst into a fit of giggles when you turned the compressor by hand and it farted and groaned. Most I have laughed in a month. Thanks Darren. Great video too well done.

I think I would reduce the size of the motor pully. That pully is running the hell out of that compressor.

My eye goes to the nice trail 70 you have on the lift. My neighbor used to have one and I always wished I had one. Love it!

And definitely tear the old one apart. Plus maybe put the guard back on, safety third.

Hi, Here in the Netherlands it was already 2 in the afternoon (assuming we are 6hrs ahead) A new mustie1 video still is a welcome supprise though. Following your videos for over a year now, thanks for all your effords and the entertainment it brought me. much appreciated. Ohhh and by the way ..... I also would like to see the old compressor getting "analised" . Cheers Hans

I vote for three things. 1) Measure the actual head temperature of this compressor. The running temperature can make a huge difference in its longevity. 2) A still smaller pulley on the motor on this compressor. It sounds like it is spinning a lot faster than most compressors I hear. 3) Don't leave curiosity hanging. Tear down the other compressor to see what the failure is. You will always wonder if you don't! Don't drive yourself crazy that way!

The first thing I thought of when I saw that huge pulley on the motor was "He better change that out so it doesn't trash that older compressor."😮 Sounds much better with the smaller pulley. If that motor is turning 3600, your compressor is probably around 17-1800 now (which is still a little fast, but not too dramatic). It should survive as long as you use a good synthetic air compressor oil that isn't affected by heat. You ought to drill a couple pieces of 1 1/2" x 1/8" strap steel and weld 2 pieces of 3/8" all-thread to them and weld a piece of 1" angle iron, the width of the motor/compressor mounting plate, to the motor end and drill it for the all-thread. This will allow you to adjust the belt tension without fighting with screwdrivers and such through the mounting slots. I hate that they don't put some sort of adjusting apparatus on those cheap compressors from the factory. Ingersoll-Rand, Craftsman, DeVilbiss, etc. all come from the same factory in China or Taiwan now and they just slap the appropriate decals on them.😜 Overall, it ought run fairly trouble-free for a few years at least. Hopefully that motor isn't partially cooked inside where you can't see it. Time will tell...

It's called an unloader valve to keep head pressure off the compressor. Great videos, love the channel.

Nice video. I think its exellent that you'll delve into such a variety of different projects. One day a trail 70, the next a piston air compressor. Truly a man after my own heart. Keep up the good work.

Hey man, I am a computer engineer and service dog trainer from Ontario Canada, I watch and enjoy ALL of your videos! Thanks so much for making them!

I've been going watching your channel. You remind me of my grandfather, in a good way. 😬 You're an old school mechanic. Your troubleshooting technique is something everyone can learn from. Thank you for sharing.

Please take it apart, sounds like a broken connecting rod :)

Looks like a 3450 RPM motor. Wonder if the replacement compressor is intended to run at 1740 RPM. Regardless, you should go much smaller on the motor pulley and slow it down to make it last.....

With a piston compressor head, direction only matters for cooling. Rotation is converted from a rotary motion, to a reciprocating motion by the crank. So, it's up and down for the piston no matter what direction you turn the crank. The reed valves will only allow the air to flow in one direction in any case. I have built a number of these compressors using piston type air conditioning compressors from vehicles. They are very powerful and work well as long as you regulate them (the electromagnetic clutch makes this really easy using just a standard compressor pressure switch), and you gotta keep oil in them. They do "puke" a little oil into the outlet so mount a separator inline and an air filter on the intake. Keep in mind, these are designed for R12 pressures, so use caution. Most of these I have mounted on vehicle engines, for mobile use, but I have build some stationary one too. Nice job man.