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Impact gun rebuilding?

J

jkeys0218

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Found this at a garage sale yesterday for $1. It was frozen up but for a dollar I thought I'd give it a shot.

I sprayed kroil in it when I got home and let it sit overnight. Then today I hooked it up to air and twisted the part where the socket goes on (anvil?) With a wrench and it broke free. It works but has no real power.

so how hard is it to rebuild these? Is it worth rebuilding? anything I should know before cracking the case open?
And anyone have any idea on a model number? Looks like it had a label on top at one time nothing but residue left now

EDIT: Added pictures









 
never been a real fan of Chicago pneumatic stuff.

lube it .

run it .

rinse it with brake cleaner just like lube .

redo these steps till runs good.

if not there actualy real easy to play with .
 
Kits used to be available for these. Check with your favorite Snap on, Mac, Matco, Cornwell, etc., tool guy.I havn't bought a kit for one of these for years, so I can't give you an idea on price but should be fairly inexpensive. ymmv.
 
Do yourself a favor and pony up for a 3/8 or 1/2 composite impact gun from I/R from northern tools or tooltopia. Worth every penny and lite weight. You will be wondering why you didn't do it earlier!
 
Yep, Chicago Pneumatic. One of the cheaper brands. Odds are the vanes are stuck. They are supposed to fly out and seal when the motor spins. If you go into it, remove them carefully, clean them well, and put them back in with a small amount of lube.

Otherwise, spray some solvent like WD-40 or the Kroil in it, and let it run at max speed with no load to see if the vanes loosen up.
 
I took it apart last night and some of the vanes were stuck. I got them all out and cleaned them. Nothing looks worn out of damaged so I'm not gonna worry about a rebuild. Didn't get to test it last night but I will tonight. Was only getting about 30 ft pounds before
 
Truthfully, oiling it up good, and wailing on it without a load and just letting it spin will work wonders.

Keep lots of oil in it, and let it run for 4 or 5 min at WOT.

You'll be amazed how much better it runs by the end.
 
I used to "rebuild" impact guns in a maintenence department. Most of the time, disassembly, cleaning, and lubricating is all that is required to make them run like new again. For anything else we kept a box of broken ones for extra parts.
 
also don't oil them every day like they say .

I know a guy that did this and his gun was sluggish . he was ready to toss it out .

I did the brake clean flush on it and then 1 oil lube and it worked great . told him about 1 time per week .

and I like pb blaster air tool conditioner.
 
sweetk30 said:
also don't oil them every day like they say .

I know a guy that did this and his gun was sluggish . he was ready to toss it out .

I did the brake clean flush on it and then 1 oil lube and it worked great . told him about 1 time per week .

and I like pb blaster air tool conditioner.
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I agree people over oil them, but its a fine balance.

1 drop, every day you pick it up.
 
Surest way to break a harbor freight air Ratchet is to oil it..I oiled 2 per the instructions and they both promptly died...#3 I've never oiled and it won't stop running.
 
No offense, but you've already wasted enough of your time with it just posting this thread and taking all the photo's. Those were junk even new. Unless just for kicks and to tinker sure why not. But if you're expecting a decent, impact you'll be disapointed.

I just hate wasting time on usless projects. I don't have the time to do what I want to do, much less need to do, and the things I DO like to tinker with to take a break from the REAL To-Do list a mile long. So a project like this is a toss in the round can for me. Recycle round can at least. Yard art? Weld it into something cool.
 
rdn2blazer said:
No offense, but you've already wasted enough of your time with it just posting this thread and taking all the photo's. Those were junk even new. Unless just for kicks and to tinker sure why not. But if you're expecting a decent, impact you'll be disapointed.

I just hate wasting time on usless projects. I don't have the time to do what I want to do, much less need to do, and the things I DO like to tinker with to take a break from the REAL To-Do list a mile long. So a project like this is a toss in the round can for me. Recycle round can at least. Yard art? Weld it into something cool.
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No offense taken. Seized up and a price of $1 my expectations weren't high. I really just wanted to take it apart and see how it worked. Also maybe fix it if I could. I didn't get a chance to mess with it last night but I should tonight. I'm really interested to see how many ft pounds I can get out of it.


And if any one needs a impact on a budget or as a back up check Craigslist and eBay for broken ones. 90% of them say it spins freely by hand but air just passes through. From what I've learned most likely just stuck vanes which is an easy fix. Seem to be quite a few quality ones around $20 to $30.
 
brans87 said:
Do yourself a favor and pony up for a 3/8 or 1/2 composite impact gun from I/R from northern tools or tooltopia. Worth every penny and lite weight. You will be wondering why you didn't do it earlier!
Click to expand...

This! I've got Mac impact, same thing as the IR ones oreilly has, only says Mac on it. Well when I worked at the ford dealer the service writers bitched about all the noise that the lube techs impacts made so they bought the IR composite, quiet ones for us. It was by far a better impact, and much nicer to use.
 
For me is was more like a good impact on a great compressor vs a great impact on a great compressor.
 
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