inpact wrench problem
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Senior User
Joined: Jul 2002
Posts: 219
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From: SW Michigan
inpact wrench problem
Both of my wrenches don't have any power .They act as if they need more power . I just bought a 5.5 11 gallon Coleman compresser . It is rated at 120 psi. Do I need larger hoses and fittings to get more air?The guns both are$ 35 specials but I've used oil to maintain them.How do you tell when a gun is junk?I want to do my shocks this weekend. Thanks SAV
Junior User
Joined: Jan 2004
Posts: 79
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From: Pittsburgh, PA
I've found by experience that the cheap wrenches sometimes can't even break lug nuts. It probably has nothing to do with the compressor if it puts out 90 lbs. I have a run of the mill Campbell-Hausfield compressor and the gun that came with it wasn't worth the powder to blow it up. I bought a Husky professional series gun at Home Depot for about $100. It has 500 ft/lb max rating and works just great. It was recommended to me by the brother of a diesel mechanic. He kept breaking Snap On guns working on trucks and after he bought the Husky, it never broke and was significantly cheaper than the others.
Cross-Country
Joined: Sep 2002
Posts: 61
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From: Gaithersburg
I agree with MavStallion on the importance of good quality air tools. I bought one of the air tool kits and found the impact wrench to be very weak in the torque department. I subsequently bought a new IR 2C1-C off ebay. It worked greatl.
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Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
Hose size does matter. You should have a 3/8 25-50 foot (no longer) hose on a smaller single stage compressor hooked directly from the compressor to your gun. If you have any of those smaller hoses, especially the coil type attached to your gun you will never be able to move enough air to do a good job.
As it is, you will have at least a 10 psi drop between the compressor and your gun, so set the regulator at 100-110 psi, depending on the gun and hose. You can use a truck air gauge to test the final pressure at the end of the hose.
Unless you have a compressor that cost almost $1000 and is two stage, once that impact gun is on for more than a few seconds, the pressure at the end of the hose is going to drop to 80 psi or less.
Using my IR 1/2 drive I have been able to take off lug nuts on medium sized trucks. Using the air compressor on a class 8 truck with a glad hand, I even broke nuts free on a Ford L-9000 tandem axle to remove a wheel and axle!
As it is, you will have at least a 10 psi drop between the compressor and your gun, so set the regulator at 100-110 psi, depending on the gun and hose. You can use a truck air gauge to test the final pressure at the end of the hose.
Unless you have a compressor that cost almost $1000 and is two stage, once that impact gun is on for more than a few seconds, the pressure at the end of the hose is going to drop to 80 psi or less.
Using my IR 1/2 drive I have been able to take off lug nuts on medium sized trucks. Using the air compressor on a class 8 truck with a glad hand, I even broke nuts free on a Ford L-9000 tandem axle to remove a wheel and axle!
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Senior User
Joined: Jul 2002
Posts: 219
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From: SW Michigan
Today I used throtle body cleaner in my gun. I took the end off and sprayed all the passages out.It acted ok. I oiled it up good, but next time I use it I will know if I runed it or not.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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I built a surge tank from an old air bubble. It has a short 10 foot 1/2" hose for the tool with a tee, valve, and connection for your std 3/8" or 1/4" line from the compressor. It helps a lot for a momentary burst of power.
Don't forget to build a lubricator like the one shown in my gallery to keep your tools operating properly.
Don't forget to build a lubricator like the one shown in my gallery to keep your tools operating properly.