Once Was Enough

Kinda reminds me of this place I know about…..

Watch it  few times and you will see it lets go right before the hammer gets there the second time.

Love the dumb fucking kid  off to the side.

Dumbass would have been fucked before he could react if he was behind it.

Also note, not even a hint of personal protective gear anywhere besides the gloves  and why bother tying the cylinder down to anything?

Gotta love these people.


12 thoughts on “Once Was Enough

  1. As an air compressor mechanic, Millwright, and maintenance mechanic, I have worked
    on a lot of pneumatic and hydraulic rams. Single or double acting, it makes no sense
    to me since they are designed to not hold residual pressure. The only explanation is
    that they removed the head bolts, pressurized the cylinder on purpose to separate the
    head. Every pneumatic and hydraulic ram has a piston attached to the piston shaft
    behind the head. These guys are engaging in Gonzo mechanics even if they pumped
    more air pressure than was needed. A pro would have heated the outboard end of
    the cylinder to expand it and simply pulled the two components apart with little effort.

    If the head had threaded jack screw holes, none of this would be necessary.


    • More than likely they took the fittings off, screwed valves in, filled it with something like nitrogen and then POP it went. It is kind of goofy because you would think the end caps would be screwed on, otherwise just the normal hydraulic pressure would pop it loose.
      Unless it had monster snap ring holding it in instead and they already took that out.


      • Every cylinder I ever worked on had bolt on caps. Think of it as
        a pipe flange, but in this case with high-pressure seals instead of
        gaskets. The best guess is that they screwed a valve into the in-
        board side, and applied pressure after they removed the head bolts.
        This may have been a quick and dirty way of getting the job done
        but as one of your commenters pointed out, one man in the wrong
        place would have had a bad day.

        My father learned a lesson the hard way. He was working on an air
        compressor with an isolation valve in the discharge line. He opened
        the safety valve to vent the pressure then went to lunch. He removed
        the bolts on a discharge valve cover and gave it tap with a hammer.
        The isolation valve had a small leak so it was back up to pressure
        by the time he returned. He got hit in the face with the valve cover
        leaving a nice gash on his nose. A co-worker drove him to the
        hospital in a brand new car. My dad felt guilty about bleeding
        all over the upholstery.


  2. I work as a designer in a manufacturing plant. We design hydraulic systems, to supplement our equipment. Tho’ few if any that use cylinders that large. That thing could easily raise 100,000 pounds. A 100 mph fast ball can kill you. Getting hit with either end of that would have resulted into you being gathered up with a shovel and a shop vac. Dumb, dumb, dumb.


  3. It doesn’t look like he hits it with the first or second hammer swing. I don’t see any hoses connected to the cylinder, residual pressure? looks fishy to me.


    • Not likely. Pneumatic and hydraulic cylinders vent to atmosphere
      or in the case of hydraulic, vent oil back to a reservoir through
      solenoid valves. A check valve in the system would trap pressure
      with no way to vent it.


      • Piloted check valves are used on some life safety applications such as cranes and man lifts. They are mounted directly on the cylinder itself. It takes pilot pressure to open them. This is done so that if a hose bursts the cylinder will not move keeping the system from collapsing.


        • That’s a new one on me, but how do you relieve the pressure? I
          have worked on a few man lifts and they generally have manual
          valves that vent pressure back to the hydraulic reservoir. I have
          done a lot of work on air compressors and the term pilot valve
          has a different meaning. They are generally used to actuate
          free-air unloaders for constant speed applications by unloading
          and loading the compressor at set pressures.

          Describe the operation of a piloted check valve so that I can gain
          an understanding as to how it works. I see your point about it
          being a safety device in the case of a hose break but under
          normal operating conditions does it have an input to allow
          for venting the pressure and/or have a modulating effect to
          control the speed of extension or retraction?


      • Sorry, I missed the words pilot pressure. Ignore my question
        about an input. Gardner Denver rotary screw compressors
        have a similar control device. I was just having trouble
        wrapping my mind around a piloted check valve. All of
        the pneumatic and hydraulic rams I worked on never had
        one but they were not safety critical. Now that I got it, I
        am reminded that the man-lift I did some work on had small
        diameter tubes on the booms. Thanks, I was suffering a brain
        fart and you cleared it up.


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