| Author | Message | ||
     Michael Noe (Noee) Senior Member Username: Noee Post Number: 861 Registered: 03-2002 |
My dad left me a bunch of tools after his mid-life crisis, one being a 1974 Craftsman air compressor with sand blaster, spray gun, assorted air tools, etc. I put a new regulator on, new hoses and rewired it for 220 and put a new motor in it. So far, so good...except, the impact wrench does not produce the advertised torque. I went to a larger size hose (5/8"). Could this by causing the problem? | ||
| Dean Brown (Deanbrown3d) Senior Member Username: Deanbrown3d Post Number: 1431 Registered: 02-2002 |
Why would a larger hose hinder it? | ||
| Craig Kobayashi (Koby) Dweb Lounge Member Username: Koby Post Number: 1050 Registered: 02-2002 |
How big is the reservoir on the compressor? | ||
| Michael Noe (Noee) Senior Member Username: Noee Post Number: 863 Registered: 03-2002 |
I can't think of any reason a larger diameter hose would hinder it, I'm reaching. The impact wrench is essentially NOS, in excellent condition. Doesn't seem to matter where I set the impact regulator (1-4) The compressor says 6.3CFM@90PSI but doesn't list a capacity, I'm guessing it's 20gal. I set the compressor regulator to just under 100PSI. It doesn't cycle abnormally and seems to regain pressure very quickly. Here is a Pic | ||
| Mike Rupp (Mike_rupp) Senior Member Username: Mike_rupp Post Number: 308 Registered: 02-2002 |
"the impact wrench does not produce the advertised torque." How do you know this? Did you measure the torque or is it a judgement based on the way it used to work? If the compressor is building the proper pressure and you aren't getting enough torque, I'd suspect the impact wrench. I had a cheapo in-line oiler a while back that gave me nothing but problems. It would output way too much oil. The impact wrench ran like crap. I had to take off the oiler and run the impact wrench for about 10 minutes to clear out the excess oil. | ||
| John Lee (Johnlee) Dweb Lounge Member Username: Johnlee Post Number: 896 Registered: 03-2003 |
Mike, Try this. Set your regulator for 100 psi and let the air inside the air hose reach the pressure. Then impact something with the impact wrench and be cognizant of the impact wrench's cadence. When you try this, does the cadence get slower as you run the impact wrench for anything longer than a short burst? Then stop and let the hose pressurize again. Then try it again. Does the impact wrench's cadence start off fast and then slow down? | ||
| Michael Noe (Noee) Senior Member Username: Noee Post Number: 864 Registered: 03-2002 |
Didn't get a chance to play with it today. The only thing inline is a water/oil remover, right at the downstream side. I tested it by torquing my wheels to 100ft/lbs with a torque wrench, then tried to remove them with the impact. No go. Box says it will work to 230ft/lbs. I do recall it sounding sluggish, but I don't recall a changing cadence. I'm changing wheels out tomorrow, should be a good opportunity to run that test. Thanks. | ||
| Brian Brown (Rtiqulatendisco) New Member Username: Rtiqulatendisco Post Number: 10 Registered: 01-2004 |
Try your CO2 tank and see if that makes any difference. | ||
| Michael Noe (Noee) Senior Member Username: Noee Post Number: 866 Registered: 03-2002 |
Alas, some success, problem partially solved. No cadence change, but I did remove the inline water filter and cranked the tank regulator up to max (135PSI indicated). That seems to get me about 150 ft/lbs but it doesn't take long for the compressor to kick back on. Also, a ton of oil started coming out of the gun, then less and less, so maybe that was also contributing. Tried the CO2 tank...ended up using all the CO2 in about 15 seconds, but it spun the hell outta that thing....oh well, must've been low. Thanks again. | ||
| John Lee (Johnlee) Dweb Lounge Member Username: Johnlee Post Number: 908 Registered: 03-2003 |
When you say no cadence change, were you actually using the impact on a tight fastener or just letting it go wide open in the air? | ||
| Michael Noe (Noee) Senior Member Username: Noee Post Number: 867 Registered: 03-2002 |
Both. On a tight fastener (wheel nut), it would just pop-pop-pop-pop, consistently, but without much (relative) force. I let this go for about 10 seconds at a time (longer than a short burst?). After 3 of these 10-sec attempts, it does actually sound lower and the compressor kicks in. It's better now than it was, but still doesn't feel to spec. My neighbor says to remove the regulator completely and attach the hose directly to the compressor with nothing between it and the impact. Not sure this is something I want to do. | ||
| John Lee (Johnlee) Dweb Lounge Member Username: Johnlee Post Number: 913 Registered: 03-2003 |
I agree with your neighbor. At least try it without the regulator in place and see if your problem persists. The reason I was asking about the cadence is because we had the same problem and now we just bypass the regulator for impact wrench and air ratchet use. The only time I use the regulator is for our pneumatic orbital. | ||
| Michael Noe (Noee) Senior Member Username: Noee Post Number: 868 Registered: 03-2002 |
I'll give it a shot, see what happens... | ||
| Ryan Roundy (Rrefxut) Member Username: Rrefxut Post Number: 93 Registered: 12-2003 |
How did it work out? I had the same problem a few years ago when I bought an Ingersol Rand impact, and was fairly upset, because I paid good money for a good one. Finally I killed my little sears home mechanic style compressor, and went out and got a larger permanent garage mount compressor which put out 22 CFM's, much higher than the first, but the same 120 psi, and the gun worked better than perfect, sheared 2 studs removing lugs on my jeep. So you may want to check the CFM rating on your gun, and see if 6.3 CFM's is enough? Ry | ||
| Ryan Roundy (Rrefxut) Member Username: Rrefxut Post Number: 96 Registered: 12-2003 |
I checked out of curiosity, and couldn't find anywhere on my imapct the CFM rating required, but my D/A sander requires 17 CFM's, which is the tool I burned up my old compressor on. Good Luck, Ry | ||
| Michael Noe (Noee) Senior Member Username: Noee Post Number: 901 Registered: 03-2002 |
Well, I took everything out of the line and I still am not getting what I think should be optimal performance from teh impact, but it is better than it was and it is usable now. My guess is that the impact is just a cheapo and the compressor is not exactly a man about things. |
