What type oil does the dewault emglo require - Garden

I just rebuilt my Emglo AM78 4CHV, new pressure switch, unloaded, check valve, aftercooler, and changed the #30 oil, It takes 4oz.
Runs like new after not cutting in/out correctly and purging air before reaching 125 psi. Kicked it down to 115 max psi via main spring setting. Don't need 125 for trim nailing and siding.
FYI don't use cheaper generic 125 psi pressure switch from Amazon!!
use Jenny M4-1247 (140-1074-01)

Use 30 wt oil and fill it up till it comes 1/2 way up in the bubble.

Looking at your manual, instead of the actual item since I don't have one, I see 312, 329 and 314. It is possible that 312 the switch is shorted causing the pump to run to pop off and beyond. Item 14 is the pop off valve and if the numbers indicate anything, it is a 175 PSI pop off and is going off early. The switch doesn't have any indication of pressure rating.

The screw and bracket that mounts on the switch may be a pressure adjustment but hard to tell remotely.

Some units like this don't have adjustments, they just pump to a predetermined pressure and stop, being determined by the pressure switch and if the switch fails, a pop off will prevent over-pressuring the tank or system.

If you determine that the screw and bracket do not make an adjustable pressure switch, replace the switch with a like on or one that you can adjust in the range you need. Also if the pop off is going off early, replace or if possible, clean it, they can become dirty with rust.

Is possible that the screw fell out of the pressure switch rendering it "broken" until you put it back in....

Need to use air compressor oil it is available at you local hardware store in the tools department.

Dewalt recommends using synthetic pump oil, however if you only use the machine occasionally and not in a commercial setting, standard compressor oil will work great and save you money. Synthetic oil will last longer and can take much higher temperatures without breaking down. Lowes sell the kobalt brand of compressor oil and sells for about $3 for standard and $7 for synthetic. Home depot sells campbell hausfeld brand but equally as good. Auto parts stores also sell a line of compressor /pump oil just watch pricing for your needs. If you can't find compressor oil, non-detergent motor oil works just fine. Good holidays

Hello,

Yes you can use synthetic oil in you compressor. Emglo just has their name on it. Its ok to use.

Hope this helps, Matt

If you need further help, I’m available over the phone at https://www.6ya.com/expert/matt_8dbc24bf722649ac

The compressor tanks 4 ounces of oil.

You want to use a synthetic oil in this unit. We like to use Mobil 1 full synthetic 10w30 oil.

Here is a link top the owners manual:

http://shoppingcart.msservicecompany.com/msservice_net/product_files/D55155/D55155_OM.pdf

What are you putting the oil in? The compressor takes regular non-detergent oil, and it should have a dipstick or a site glass. The guns on the other hand, take the pneumatic oil, and most of them now days, don't even take oil. Only the older ones. I haven't changed or touched the oil in my compressor in 20 years. Any of them. Check it out.

any small compressor oil will do like dewalt,quincy....or 30 sae oil

use sae 30 non detergent oil in this compressor let me know if you got any other qeustions