uieluck Posted August 15, 2021 Report Share Posted August 15, 2021 Hey guys… A tool question? I’ve been struggling with getting a few bolts LOOSE (on smaller semi’s), not my Datsun. I’m running a Harbor Freight 175psi, 1.5HP, 20 gallon oilless air compressor. Along with THESE Husky air tools (v). I’m having a problem with power! Where this setup would be “ok” for some applications, it DEFINITELY doesn’t loosing the bolts on my semi frame. Does someone have a suggestion in what I should run? Specifically, how can I get enough power to loosen larger bolts? Thanks!! Quote Link to comment
thisismatt Posted August 15, 2021 Report Share Posted August 15, 2021 What's the reverse torque rating on that impact? I have an IR 231c which has handled everything I've used it for. Those bolts in your pic surely can't be any worse than fwd axle nuts or 510 rear hub nuts. A larger (eg 3/8") air delivery hose can help, and I also feel like the regulators on cheap compressors are a big limiting factor as their recovery time seems really bad - in other words, when you set the regulator to 90psi and then shoot a framing gun, for instance, it takes a noticable time for the hose pressure to get back to 90psi even as the tank pressure is well above... Quote Link to comment
jagman Posted August 16, 2021 Report Share Posted August 16, 2021 I had a similar problem with the bolts on my backhoe so I bought a 3/4 drive air impact and ran 3/8 air line just for that impact. It worked well on all but the 1 1/2" nuts. I had to extend my 3/4" breaker bar 6 feet to get the torque to break them loose! 1 Quote Link to comment
ratpatrol66 Posted August 16, 2021 Report Share Posted August 16, 2021 More power. Get a big 1/2" Mac. 1 Quote Link to comment
Ranman72 Posted August 17, 2021 Report Share Posted August 17, 2021 I have one of these it has been impressive for a harbor freight i would have never tried one if I hadn't used my friends first not sure how it will do with semis look for a high removal torque for best results https://www.harborfreight.com/12-in-composite-xtreme-torque-air-impact-wrench-62891.html?utm_source=google&utm_medium=cpc&utm_campaign=12126915354&campaignid=12126915354&utm_content=115714607014&adsetid=115714607014&product=62891&store=540&gclid=EAIaIQobChMI_N24kOK28gIVGM53Ch1PVwFdEAQYAiABEgJNKPD_BwE 1 Quote Link to comment
Ranman72 Posted August 17, 2021 Report Share Posted August 17, 2021 if your really serious here is a whole other level you will need 1' sockets or a reducer which runs the risk of being twisted in 2 https://www.amazon.com/VEVOR-Pneumatic-Impact-Nm(3542ft-lbs)-Extended/dp/B07G2DZQRL/ref=pd_sbs_1/141-0401841-9297016?pd_rd_w=2BpRA&pf_rd_p=0f56f70f-21e6-4d11-bb4a-bcdb928a3c5a&pf_rd_r=D1GN6NWSFY2BJ659MXJV&pd_rd_r=5c3bb7a0-eba7-44ff-9ae1-8f8b7d248b1d&pd_rd_wg=1lX0l&pd_rd_i=B07G2DZQRL&psc=1 1 Quote Link to comment
Ooph! Posted August 17, 2021 Report Share Posted August 17, 2021 use the shortest or no extension you can as they seem to cushion the impacts imho Quote Link to comment
uieluck Posted August 17, 2021 Author Report Share Posted August 17, 2021 Thanks guys!! Looking into all ^ these options. Do you think my air compressor is powerful enough? I have this one: https://www.harborfreight.com/air-tools-compressors/air-compressors-tanks/21-gallon-175-psi-oil-free-vertical-air-compressor-64858.html Quote Link to comment
thisismatt Posted August 17, 2021 Report Share Posted August 17, 2021 The cfm@90 isn't great, but it shouldn't matter as long as you haven't already used so much air that you've dipped below 90psi Quote Link to comment
Draker Posted August 17, 2021 Report Share Posted August 17, 2021 CFM is key when it comes to air compressors. Impacts, sanders, and blasting cabinets tend to need a lot of CFMs. 1 Quote Link to comment
bottomwatcher Posted August 17, 2021 Report Share Posted August 17, 2021 Ok I modify my Harbor freights by first adjusting the cutoff switch to max pressure. Remove the pressure relief valve and add a T fitting in its place. Put the relief valve in the elbow and add another air fitting to the straight part of the T. This makes a nice straight dump of unregulated air to the tool. Fills tires faster ect too. Quote Link to comment
Arielito Posted August 17, 2021 Report Share Posted August 17, 2021 (edited) Hello I have a 280z looking for a mechanic to rebuild the engine any recommendations Edited August 19, 2021 by Arielito Quote Link to comment
thisismatt Posted August 17, 2021 Report Share Posted August 17, 2021 6 hours ago, Draker said: CFM is key when it comes to air compressors. Impacts, sanders, and blasting cabinets tend to need a lot of CFMs. Unless the regulator is the limiting factor, you should have plenty of initial air with a full tank to break bolts loose before pressure drops & the motor kicks on. Continuous usage tools are another issue but for an impact he should be ok. 1 Quote Link to comment
john510 Posted August 21, 2021 Report Share Posted August 21, 2021 You need a bigger compressor. Quote Link to comment
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