Heavy Equipment Forums Heavy Equipment Community

excavator shear

JPCobra105 ยท 2009-02-25 18:55

hi everyone. im looking into putting a small shear on one of my cat 312's i really only need it for this one job. looked into renting and they want 3000$ a day. so i think im gonna buy a used one. any input on what i should look at? right now im looking at a laBounty MSD 105R. my machine has one aux circuit. it appears that this shear is rotating. can anyone explain how i would go about mounting it? do i need a secondary aux circuit to use it? im not trying to spend too much. but at 3000$ a day i can probably buy one for the week or so ill need it. id like a shear that goes on the bucket linkage and one that only needs the one aux circuit. thanks for any input

Replies4
  1. #1special tool2009-02-25 19:53

    $3000 A DAY???? Uuuuuh, yeah. Someone else trying to retire on one job. Please call my friend Rick. 35 years in business only hammer, couplers, shears, crushers, etc. 914-224-3203 Westchester.

  2. #2ben46a2009-02-25 22:08

    With a rotator you need a Medium pressure circuit and a case drain line, as well as two pump, 2 way flow for the shear. If you only have one pump two way flow your shear will be very slow operating due to the size of the cylinder. Also, on a smaller machine such as yur a shear without a rotator is very hard on sticks and linkages as the rotator will turn i overstressed and not transfer that stress to the machine.

  3. #3JPCobra1052009-02-25 23:30

    3000$ a day was from hertz rental. they only rent the shear with a machine. (cat 320 i think) i called all around to find one local. cat dealer had a few recomendations, but for what it would cost between transport and rental for a week or so im better off buying one. at least it has some resale value. as far as stressing the machine. im not too worried about it. it will be a very rare use. the largest material im cutting is 4in I beam.

  4. #4ben46a2009-02-26 10:56

    What auxiliary circuit does your machine have? one pump two way flow or two pump two way flow?