Tool Questions...Impact Wrenches

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49Cub2017
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Tool Questions...Impact Wrenches

Postby 49Cub2017 » Sun Apr 15, 2018 10:13 am

It's been strongly suggested that I use an impact wrench to remove the head bolts on the Cub so I can replace that blown gasket and that is what I'm going to do. I've never owned or even used one before since my Craftsman ratchet set has served me well so far. However, I realize the head bolts are probably a challenge even the 1/2' ratchet can't handle. The more I read about impact wrenches the more I realize I probably could have used one many times in the past, so this looks like a good excuse to buy another tool! :D So, I'm wondering cordless or air and 3/8" or 1/2"?...I have a small tool compressor, but cfm at 90 psi is something like 2 to 3.8 or in that range, so that doesn't sound like the best choice. I've got a 20V Dewalt drill, so if I find a battery compatible bare tool, seems like maybe that's the way to go. But, how does the wrench work? I understand the torque part of it, but is the vibration/impact also variable depending on how far you squeeze the trigger? In other words, in reverse, while I'm trying to gently ease those bolts out, do I gently squeeze the trigger to apply less than full torque? The air wrenches I've researched all seem to have variable forward torque, but apply full torque in reverse and that sounds like it would be too much in a situation like this where you don't want to risk shearing. As to size, seems like 1/2" would be the most versatile and would work better for things like removing tire rim bolts and other larger bolts. So, basically, where impact wrenches are concerned I don't know much! :lol:

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Re: Tool Questions...Impact Wrenches

Postby Barnyard » Sun Apr 15, 2018 10:35 am

I have an old Craftsman electric one that has served me well for the last twenty years. I also have a Milwaukee 18 volt that does well also. Whatever you get, make sure it is 1/2" drive. For heavy stuff I prefer electric.

Since you already have a 20 volt Dewalt drill you might want to consider this if your battery is the same. https://www.lowes.com/pd/DEWALT-XR-20-V ... trEALw_wcB
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Re: Tool Questions...Impact Wrenches

Postby 49Cub2017 » Sun Apr 15, 2018 11:47 am

Barnyard: I think the batteries for my drill will work with this wrench and it looks like a great choice. Thanks for the suggestion.

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Re: Tool Questions...Impact Wrenches

Postby tomcat » Sun Apr 15, 2018 12:05 pm

I bought a 3/8 Drive butterfly air impact from Harbor freight a few years ago and it did a great job you can work it back a forth without changing the button. I think it sells for around $20

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Re: Tool Questions...Impact Wrenches

Postby 49Cub2017 » Sun Apr 15, 2018 12:14 pm

tomcat: I like the price, but I wonder if it would have enough power to loosen those really stuck head bolts.

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Re: Tool Questions...Impact Wrenches

Postby Barnyard » Sun Apr 15, 2018 12:35 pm

49Cub2017 wrote:Barnyard: I think the batteries for my drill will work with this wrench and it looks like a great choice. Thanks for the suggestion.

Compare the Dewalt with an electric one and see what kind of torque you get with each. Head bolts may need more muscle than other bolts.
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Re: Tool Questions...Impact Wrenches

Postby Clownfish » Sun Apr 15, 2018 1:20 pm

I have the DeWalt that Barnyard referenced and it works great. In the past month I have removed the headbolts from 3 Cub engines with no problems and on 2 of them I don't think the bolts had been removed before. It has 3 settings that work both forward and backward and I started on the lowest setting and worked up. Dewalt has another model that looks very similar but has much less power.

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Re: Tool Questions...Impact Wrenches

Postby tomcat » Sun Apr 15, 2018 1:56 pm

Seems like I did have to bump a couple of them with my 1/2 inch drive to break them lose

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Re: Tool Questions...Impact Wrenches

Postby John *.?-!.* cub owner » Sun Apr 15, 2018 2:08 pm

I have an assortment of impact wrenches to use. I have a 3/8 butterfly, 1/2 impact and serious 1/2 impact I get when it becomes a case of get the bolt out or break it off so I can get the item off. :evil: However, I seldom get the air wrenches out anymore. I have a set of Dewalts that are my first choice. I have one of the impact driver that I use socket adapters in for the smaller bolts, say up to 3/8 bolts. If that doesn't do it I have a standard 1/2 drive impact, and if that doesn't make it I grab the big 1/2 impact which has approx. 300lbs torque in the removal mode. If those don't do it I grab the 2 bigger air wrenches, the biggest one is an Earthquake gun, which is Harbor Freight's version of the Thunder guns many of the stock car racers used to use in the pits. I know some people do not like Harbor Freight, but I have an impact and air ratchet I have owned for over 35 years that still work great.
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Re: Tool Questions...Impact Wrenches

Postby 49Cub2017 » Sun Apr 15, 2018 2:45 pm

Clownfish: That's what I wanted to hear! Sounds like that Dewalt is the way to go since it worked well for you doing the same job I need it for and now I have a better understanding of how to use it. John: I've also learned a lot from your other posts on this topic. Up until today I thought everyone's first choice would be air powered tools for this kind of task, but am realizing that cordless tools have come a long way. It really is getting to be amazing how much power is produced by these Li-ion battery tools. tomcat: I didn't know about that butterfly air impact tool until you pointed it out to me...now I want one of those too! From what John says, you can't have too many of them and it's about time I started my collection. I appreciate all the comments and suggestions. I was getting a little discouraged about how tough those bolts were going to be to get out, but now I think with the right tool it shouldn't be any big deal. :D

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Re: Tool Questions...Impact Wrenches

Postby Don McCombs » Sun Apr 15, 2018 2:47 pm

Shop around. I think you can get it for less than $229.
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Re: Tool Questions...Impact Wrenches

Postby 49Cub2017 » Sun Apr 15, 2018 2:59 pm

Amazon has it for about $210.00, but it's reconditioned. Any thoughts on reconditioned vs. new? I think I'd rather have new, but reconditioned can also be a good choice sometimes. I think the $229.00 is a new one and $19.00 doesn't seem like much of a savings, does it?

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Re: Tool Questions...Impact Wrenches

Postby Barnyard » Sun Apr 15, 2018 3:02 pm

Don McCombs wrote:Shop around. I think you can get it for less than $229.

The one I posted is 700 torque pounds. The lower priced ones are around 400 torque pounds.

49Cub2017 wrote:Amazon has it for about $210.00, but it's reconditioned. Any thoughts on reconditioned vs. new? I think I'd rather have new, but reconditioned can also be a good choice sometimes. I think the $229.00 is a new one and $19.00 doesn't seem like much of a savings, does it?

Spend the extra $19.00 and get a brand new one with full factory warranty.
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.
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Re: Tool Questions...Impact Wrenches

Postby 49Cub2017 » Sun Apr 15, 2018 3:12 pm

I took another look at the one on Amazon and I think it's new with a 3 year warranty...must have got that wrong the first time. And it has the Hog ring anvil, which is supposed to be a good thing. And it's slightly less than $210.00. I'll look around a bit more, but I have a feeling this might be the one.

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Re: Tool Questions...Impact Wrenches

Postby Clownfish » Sun Apr 15, 2018 3:29 pm

Just to be Clear--This is the one I have.

DCF899B
20v MAX* XR High Torque 1/2" Impact Wrench w. Detent Pin Anvil . Type of anvil is just my personal preference.
Last edited by Clownfish on Sun Apr 15, 2018 3:38 pm, edited 2 times in total.


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