DeWalt air compressor

[v1ru5879]

Found a deal on a 15 gallon DeWalt air compressor D55168 that doesn't turn on. They are asking $50 but open to offers, I was gonna offer$25. How cheap or expensive could this be to repair? I was thinking even at $25 for the tank is a good deal

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[The Cobbler]

hard to say what's wrong. could be as easy as a bad connection, a failed switch, or more serious to blown motor, etc.
it's probably worth a $50 gamble, for $25 would probably easily be worth it in parts alone,

 

[v1ru5879]

Guy said he was using it just the other day n it shut off n wouldn't go back on. Of course idk if that is the case. Worst case scenario maybe swap on a cheap HF pump?

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[The Cobbler]

yeah. I would buy it if it looks in decent shape,and see what the problem is , but I am a compressor addict too!

 

[v1ru5879]

I've held off on buying one cause I can't justify the need all my tools are electric but a compressor always comes in handy. It sells new for 350 at Lowe's. I've never worked on an air compressor before so I figured I would ask before trying my hand at fixing it.

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[The Cobbler]

there's a good bunch of guys on here willing to help out, if you're not a **** head
once you have a compressor you'll wonder what you did without one.

 

[v1ru5879]

Here is the only pic he has posted. It looks like the pressure switch is the least expensive part to replace

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[The Cobbler]

I would grab it myself.
actually I had a compressor that crapped out once ( after 2 guys stapling underlay for several hrs) and after looking at all the easy stuff, it was just an overload that had tripped . pushed it and voila... could be the case here.

 

[v1ru5879]

I'm gonna offer $20 he seems have no use and willing to part ways for next to nothing

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[v1ru5879]

He accepted I'll be picking it up tomorrow and see if I can hopefully salvage this would this be the right section to ask for help?

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[The Cobbler]

sure, this same thread would be fine I think.

 

[The Cobbler]

here is how I would start.
1) plug it in and see what it does
2) look for a reset somewhere hiding on the motor/under the shroud etc. if you find on push it to see if it just needed to be re set
3) take the switch cover off and see if there's power to the switch
4) see if there's power on the load side of the switch
5) take off the shroud, somewhere in there will be 1 or 2 capacitors, see if they look swelled , check them with a meter .
6) see if the motor spins by hand
6) you will need to dig deeper into it, but there's the easy diagnosing .

 

[v1ru5879]

Awesome man thanks! I'm sure I will be on here asking about something tomorrow. I'll go through the steps you just said. Do these things take the bushes like drills n other tools do?

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[The Cobbler]

no to brushes .

edit, that motor appears to use brushes https://www.ereplacementparts.com/dewalt-d55168-type-compressor-parts-c-1009_3079_3945.html

 

[Unruh]

Not trying to steal your thread, i’m Actually interested in how this turns out for you; but I just saw a listing for an air compressor that says

“Works good but needs the line into the back fixed ”

What is he talking about? Power cord?

 

[v1ru5879]

Not trying to steal your thread, i’m Actually interested in how this turns out for you; but I just saw a listing for an air compressor that says

“Works good but needs the line into the back fixed ”

What is he talking about? Power cord?

Sounds like he might be talking about the line that feeds into the tank?? typically people will use the word cord if they are referring to the power cable could be a quick and easy fix. Im just waiting to hear back from the guy so I can go pick it up. Im gonna go through the steps listed above to try and diagnose it. I will look for the brushes first and see what kind of shape they are in. Fingers crossed its an easy fix and I will have a good compressor for under $100

 

[v1ru5879]

So finally got it. Right off the bat I notice the power cable is missing the ground portion of the plug. I plugged it in and it stuttered a bit

 

[DieselNut88]

We have one of those at work. It is a great compressor, although it is loud. They are not cheap new so that is a great deal regardless of what parts it may need.

 

[v1ru5879]

Replaced the power cord and pulled the brushes they are about 3/8 left

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[v1ru5879]

Anyone know if I would be able to find those brushes at a hardware store or is it an order item. When plugged in it will try to run then stop. Rotated the pull and piston isn't seized

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[The Cobbler]

I would unhook one end of the tube that runs from the compressor to the tank check valve.
try running it . sounds like maybe the centrifugal motor starter might be to blame (assuming it has one) .

 

[v1ru5879]

I'll spend some more time with it tomorrow, it's in my office at work. I'll try disconnecting the tube like you mentioned. I did also notice the fan was completely missing all the blades looks easy enough to replace. Still gotta locate the capacitors

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[dumper]

Replaced the power cord and pulled the brushes they are about 3/8 left

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if you are saying 3/8 inches, that is not much shorter than new brushes. Are they clean, or have any burn marks? Check out the commutator-clean with rubbing alcohol and q-tip.

 

[v1ru5879]

if you are saying 3/8 inches, that is not much shorter than new brushes. Are they clean, or have any burn marks? Check out the commutator-clean with rubbing alcohol and q-tip.

These brushes are actually pretty long

https://www.ereplacementparts.com/carbon-brush-p-92431.html

I'm pretty sure the commutator looked a bit dirty I'll have a better look over of it tomorrow I only got to spend about an hour on it most of which was trying to get the brush spring back in since I popped it off completely and the other retracted back and had fun getting it out.

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[The Cobbler]

as long as the brush springs have pressure on the brushes, doubt it's them .

 

[v1ru5879]

Should the fan be able to be spun by hand? IDK if that would indicate something being seized up. Couldn't seem to find a reset switch on it in the short amount of time I was working on it

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[The Cobbler]

I would pull the belt off & see what turns easily & what doesn't(if anything) .
try the motor with the belt off & see if it spins.
process of elimination

 

[v1ru5879]

I spun the pully and the piston seemed to pump without unreasonable amount of effort this was with the belt on. I'm going to repair the damaged cord tomorrow since the one I swapped may have something to do with it

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[v1ru5879]

found the culprit. At the end of the motor where its attached to the pully the bearing is shot, thus preventing the motor from spinning. Gonna go rent a puller to remove the pully then see if I can find somewhere with the same size bearing

 

[The Cobbler]

nice!
probably a number on it, and probably a common bearing

 

[v1ru5879]

Found them on Amazon for $5 they will be in Tuesday. Used the rest of after noon cleaning everything up, this must have sat near a sander because the amount of sawdust that came out was ridiculous! The bearing that was behind the pully was completely seized. I managed to get the puller on it and the whole outer casing popped off leaving only the inner ring. Used a Dremel to carefully cut it off the shaft. Used the opportunity to shine up all the contacts with the Dremel wire brush while I had it out, also cleaned up the shafts in prep for the new bearings. Gonna pry pop the bearings in the ovens we use at work to heat them then hopefully slide them right on. Another observation was the drain on the bottom was stripped and had some type of gasket maker around the bolt, not a huge issue but something else I'll need to replace none the less. Still can't figure out how the fan blades managed to get shaved off.

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[The Cobbler]

cool, a cheap compressor .

 

[v1ru5879]

Well fingers crossed lol I'm sure there is still a chance I could put it all back n it does nothing still lol. The drain valve at the bottom, is there a preferred type of drain valve or are they all the same?

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[6PTsocket]

Well fingers crossed lol I'm sure there is still a chance I could put it all back n it does nothing still lol. The drain valve at the bottom, is there a preferred type of drain valve or are they all the same?

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A ball valve is reliable, a 1/4 turn to full open and full flow. Just make sure it is rated for the psi. There are cheaper choices but not better.

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[v1ru5879]

A ball valve is reliable, a 1/4 turn to full open and full flow. Just make sure it is rated for the psi. There are cheaper choices but not better.

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Sounds good they should have something local I could use so I should look for the 200 psi in relation to the compressor right?

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[The Cobbler]

on my stationary compressor I have installed a short lenght of air hose & a blow gun for the drain. that way I can just walk by anytime & give it a drain . it's temporary as I'm working on an auto drain setup

 

[Unruh]

Again jumping in on your thread. Sorry, but I wanted to show you the one I found. 28 gallon Campbell Hausfeld. It took a fall and the bracket holding the motor broke on one side. I fixed that with a piece of angle iron I had sitting around. Also he said, “Works but needs the line into the back fixed”, he was talking about the check valve. I found the entire kit on Sears.com for $23.49 with shipping, it should be here Thursday. The logo was scratched up bad and faded so I pulled it off and made a new logo.

I also had to touch up some of the paint, but it was pretty minor. I'm going to change the drain as well so it is easier to get at.

 

[v1ru5879]

Again jumping in on your thread. Sorry, but I wanted to show you the one I found. 28 gallon Campbell Hausfeld. It took a fall and the bracket holding the motor broke on one side. I fixed that with a piece of angle iron I had sitting around. Also he said, “Works but needs the line into the back fixed”, he was talking about the check valve. I found the entire kit on Sears.com for $23.49 with shipping, it should be here Thursday. The logo was scratched up bad and faded so I pulled it off and made a new logo.

I also had to touch up some of the paint, but it was pretty minor. I'm going to change the drain as well so it is easier to get at.

Haha love the home improvement reference. I'm most likely going to paint mine up like a minion, my son will love it! Sounds like a nice find, what did you pick that one up for if you don't mind me asking? My bearings should be here in Tuesday and I'll install them Wednesday.

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[v1ru5879]

on my stationary compressor I have installed a short lenght of air hose & a blow gun for the drain. that way I can just walk by anytime & give it a drain . it's temporary as I'm working on an auto drain setup

Sounds like a nice set up without having to completely empty the tank. I'm going to go by the hardware store tomorrow and see what I can find, most of the ones I am seeing have the knurled end to open m close, I don't see many of the 1/4 with a psi rating

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[Unruh]

Haha love the home improvement reference. I'm most likely going to paint mine up like a minion, my son will love it! Sounds like a nice find, what did you pick that one up for if you don't mind me asking? My bearings should be here in Tuesday and I'll install them Wednesday.

I paid $65 for it. So with the parts, I'm still under $100!

The minion will be great. My son would also love that.