Breezey

Hey all,

I have a Craftsmen Professional 175PSI Compressor. My frekn Air gun cant even take off lug nuts.. What do you think the problem could be?

Bad Air Hose?

Junk Air Gun ?

30GL / 175PSI is good for a home I though... dont know... let me know what you all think

Cebby

Does it flee flow air? What is the CFM of the unit? The CFM is what moves the tools, not the max PSI of the unit.

Sounds like the Impact Wrench might be the culprit.

mt_goat

I vote for "Junk Air Gun"

Breezey

sure sure blame it on the air gun hehe


I will keep you posted on this, I am going to sears today and I am going to buy a PSI Gauge to see what PSI is at the end of the hose..

Marc P

they may be torqued on too tight. Many tire places dont use a torque wrench or stick.

Breezey

110Foot Pounds ... blah not sure ... frekn toyota hehe


SAS few more days hehe Friday we cut out the IFS... YAY!

midiwall

Like Cebby said, PSI has little to do with pushing an air tool. You have to push a LOT of air to get a tool to spin.

What's the make/model of the compressor? Does it have a CFM rating plate on it?

loosehead

110 ft-lbs is too much torque on the lugs, they only need to be 83 to 85 ft-lbs. Also, you can't run your air tools at max pressure, most impact guns should run at around 100-120 psi max. With the pressure turned down, the CFM should be there to operate the tool. Another thing, have you oiled the impact lately? If it has sat for a long time unused, spray some WD-40 into it, hook it to the hose, and give it a few quick spins in each direction. Then put in some tool oil and spin it again. THis should get out any gunk from inside and get it nice and lubed.

The only other recommendation I have is to be sure the compressor is plugged directly into a wall outlet, you should avoid extension cords when using air compressors. Hoses are raely the culprit unless they leak like crazy.

Just my $.02

SkyRat

I don't think it has anything to do with your compressor, I think it is the settings on the compressor and the tool.

I know this sounds simple but...

Make sure you have the pressure regulator (the outfolow to the impact tool) set around 110 # or so. If you have a tank full of air and the pressure is set low then it will not push the tool.

Also,
The tool should have a setting on it to regulate the torque applied to the nut. Make sure the torque setting is set pretty high when removing the lug nuts. If the setting is low the tool will not take the nuts off. Make sure it is set very low when mounting the lug nuts then finish torquing with a good torque wrench by hand to the manufacturers specs.

mt_goat

A 175 psi compressor sounds like one of those nail gun compressors with the little tanks. Is that what it is? If so the tank may be too small to deliver the needed CFM. I too doubt the hoses are the problem unless they are leaking like crazy.

Breezey

Me dont know.. .I have the bigest one sears sells. its a 30 gallon, before you get to the big big ones...

All of my air tools are new... I think its the hose..

Cebby

FWIW, I use a little PC portable compressor with my impact wrench. It isn't the strongest, but it gets the job done. It is a 2HP, 4 gallon, 120 PSI unit. I don't know the CFM, but it isn't all that much.

How about if I say this again: PSI DOES NOT EQUAL CFM.

A large tank is only one of the factors in delivering large CFM. I have a sand blast cabinet that I had a 25 gallon 4 or 5 HP compressor (single stage) unit driving it. It was not enough. I'm scouting 2 stage compressors currently. Now THOSE move some air!!

There may be some type of restriction in the regulator or some blockage in the hose. If it is new, maybe there is an outside chance that there was some foreign matter in the tank that got lodged in the regulator or hose.

Just a thought.

its2slo

stupid question: what do you have the output pressure guage set at?

anthony1

iTrader: (1)

From what you said, seems like everything should work. I'd bet the people that toque your lug nuts over did it. Try using a cheater bar and loosen one of the nut and tighten it back to 90lb. and see if you can loosen that with the air tool.