What would be the problem on some thing like this?
If the compressor is relatively new and performs well, it is probably not an issue. Brushes always spark on the commutator but without seeing the extent of the sparks it is hard to tell for certain if it is "too much" or not. I wouldn't expect any significant smoke from the brushes and commutator or the armature unless it is brand new and the oils from manufacturing are being burned off. If it is a very old machine, it is possible the armature is shorted out and needs to be replaced.
If, on the other hand, it is not brand new, but a couple years old, has had use, but not heavy and continuous and you just see small sparks coming from the brushes, then it is probably ok. If the sparks seem larger than what you are accustomed to and you are seeing smoke coming from the motor at all (presuming it is not the brand new situation noted above) then the armature may be starting to short out and/or the windings in the motor may be starting to burn out. Electric motors that are used within their design constraints (not overloaded, not run on low voltage, not run continuously if not designed for that use, not overheated) do not tend to burn out. However, if the windings get covered with sawdust (which insulates them), you run the compressor continuously for hours on end, day after day, especially in a hot environment and/or with low voltage, then you have probably overheated the windings and the motor is burning out. For a compressor of this size and quality, it would likely cost more to have the motor rewound than it cost to replace the compressor. Also, if it has failed from overly hard use, rewinding the motor will not prevent another burn-out, you need a larger, more durable compressor.
SOURCE: Air Compressor
Dewalt recommends synthetic oil in their compressors. The dewlat part # 5130427-00 quart, and 5130702-00 for a 4oz size. Available at www.dewalt.com or their service center. I have been using the Lowes brand of synthetic compressor oil. Kobalt oil sells for about $7 and works great. If you do not use your compressor all day like I do, you can use the standard grade of Kobalt compressor oil that sells for around $3. Synthetic oil is for extreme conditions. Good Luck!
SOURCE: air compressor won't stay running even with resetting
How quickly does it shut off? Is it reaching the turn off psi? or is it immediate.
If it is immediate then it is probably a power supply issue.
Air compressors are power hogs. For instance, a compressor may work fine on an outlet using the supplied power cord, but plug it into an extension cord that is insufficient for it and a repeat of your problem will occur. If you use an extension cord make sure it is made just for this kind of application. Also, if possible, give the compressor a dedicated circuit.
Another problem might be your unloader valve not working correctly. This reliefs the pressure inside the pump after the motor has stopped. it would sound like the pump is working extra hard at start-up.
SOURCE: sparking brushes
I have a 6.5 hp two stage coleman magnum force 80 gal compresur I had to replace the switch with a presure switch from grainger. Now the motor sounds like it is dragging when it starts then blows the capacitor apart. Any sugestions I am questioning if i have wired it wrong or not.
SOURCE: I just bought a Dewalt D55168 upright air
Here's a link to a diagram of your compressor. I couldn't tell much by looking at it but maybe it will be of some help since you can look at the diagram and compressor. Part number 37 is the filter. Good luck!
http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=66646&typeId=15502&documentId=34640
Testimonial: "Thanks for the very helpful information"
SOURCE: I have a dewalt D55168 air compresser. motor stays
Here is a parts diagram for the air compressor: http://shoppingcart.msservicecompany.com/msservice_net/product_files/D55168/D55168_PL.pdf There are a couple of things to look for on the air compressor. You will need to see if the piston ring is damaged or if you have a broken reed on the valve plate. These are typically the two most common problems with this model.
Here is a parts diagram for the air compressor:
http://shoppingcart.msservicecompany.com/msservice_net/product_files/D55168/D55168_PL.pdf
There are a couple of things to look for on the air compressor.
You will need to see if the piston ring is damaged or if you have a broken reed on the valve plate.
These are typically the two most common problems with this model.
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