Another motor question, weak compressor

[skeer]

So I’ve got this compressor motor off a small Dewalt deal. One of those double cylinder jobs that’s portable. Anyway IIRC the compressor was rated for like 2.something CFM. I had very briefly tested it on my 10# tank and it’d stall out at around 60psi.
probably why it was tossed, lol.

Anyway The brushes were fine, commutator looked ok..you know no scorch, pock marks. So I’m assuming an issue with the armature wiring.

 

[skeer]

Correction, looked pretty much exactly like this one

 

[wyliesdiesels]

hmmmm

 

[walta]

So I’ve got this compressor motor off a small Dewalt deal. One of those double cylinder jobs that’s portable. Anyway IIRC the compressor was rated for like 2.something CFM. I had very briefly tested it on my 10# tank and it’d stall out at around 60psi.
probably why it was tossed, lol.

Anyway The brushes were fine, commutator looked ok..you know no scorch, pock marks. So I’m assuming an issue with the armature wiring.

I would be very surprised to find brushes and commutator in such a modern compressor will you please post a photo of them?

When you say “stalls out” do you mean the motor slows and or stops and its overload trips or do you mean it run and run at normal speed but the pressure no longer increases?

If you mean runs and runs My guess is the vales and or rings have been damaged from over heating as the oilless designs all live on the bleeding edge of failure.

Walta

 

[Norcal]

Is this compressor a unitized motor/compressor unit? It may not be worth screwing with.

 

[The Cobbler]

is the motor bogging down @ 60PSI? how easily does it spin by hand? are the bearings running free? does it have a run capacitor that's maybe failing ? are you sure the pressure gauge is reading reasonably accurate ?

 

[Zeke]

hmmmm

I see what you did there.

 

[skeer]

To be totally fair guys, The parts are in the shop but now prts from the saw and drift breaker are muddying the waters. Insofar as what it was doing @The Cobbler It'd reach somewhere about 40-60lbs and just stop, the motor itself would stall out. Thermal or overload wasn't tripped.

@Norcal If Im understanding unitized then no, I actually tried it mounted on my old Sears 10 gallon tank months ago when I was testing it.

Of course as my fate demands, I've asked the question after disassembling the motor itself. I'll get it back together soon and test again.