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Bad Performance (See One-Star Reviews) Solved?
I read ALL the negative reviews and some of the positive ones. Even though the negatives "outweighed" the positives, I decided to take a chance. I reasoned this way...
I already own two (2) impact wrenches -- one "cheap import," and a nice Ingersoll Rand. Unfortunately, they have taken up residence with my offspring -- and I'd really like them back. Enter the Sears offering. Despite the negative reviews, I figured they'd be new enough, and red enough, and pretty enough, that I could talk the boys into a "trade" and, with luck, get the good wrenches well hidden before they discovered my ruse. Best case, they might even work -- according to the reviews, about 38% (give or take) actually function properly...
So, I bought two (2) wrenches for Christmas presents. One (1) of them worked quite well; one (1) could not have "impacted" its way out of wet paper bag! Fortunately, having the ability to compare a working wrench with a non-working wrench, I instantly spotted the problem! Hang on and pay careful attention here, there are some twists and turns on this ride!
On the back of the wrenches is a selector lever. This lever is made out of plastic and it operates the forward/reverse function. Here's where it gets "Tricky": this is not just a simple "Y" valve; it is a "regulator," too! Moving it in the forward direction, one can feel a number of "detents" corresponding to various power settings. The catch is, the highest setting has no "detent"; you simply have to move the valve all the way to the end of its travel.
Comparing the wrenches, I noticed the selector levers were loose! The lever on the "weak" wrench was so loose I could pull it off of the valve quite easily! It would travel through no more than three (3) detents and never reach the full power setting.
Further examination disclosed an access hole on the bottom of the "well" where the lever couples up to the selector valve / regulator. When in the neutral position, this hole lines up with a set screw that is supposed to hold the lever in place. Snugging up the "good" wrench, I got nearly two (2) turns out of the set screw; the screw on the weak wrench yielded nearly three (3) turns! Once the levers were properly tightened, the wrenches went to working; even the function of the "good" wrench improved! The thing is, if I had purchased only the weak wrench, I might not have discovered the problem!
When the instruction manual says that running the wrench for more than ten (10) seconds (without the socket turning) may damage it, there is no way this is the "Heavy Duty" tool touted in the sales literature! On the other hand, on a half (1/2) price sale, it's not a bad deal -- particularly if, as in my case, you can use it to ransom an Ingersoll Rand. Regardless, if you decide to buy one (1) and it does not work, make sure the selector lever is tight before you give up on it.
Of course, this comment reflects only my personal experience; your mileage may vary.
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not what i expected.
I bought it because of it's rating 400 ft-lb. I was able to remove small bolt. then i tried to remove my brake caliper bolts...no go. no power. I removed these bolts 2 years with hand.. I am very disappointed... junk.. what waste of money..