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Don't put all your boom out, then retract jacks and try to drive with a load.

Discussion in 'Cranes' started by crane operator, May 11, 2017.

  1. crane operator

    crane operator Senior Member

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    Pictures are from the sale of the damaged machine. Was a bare rental machine, $450,000 machine with 300 odd hours on it. Just stupid- why you would try to drive around on rubber with a short load like that with all the boom out is beyond me.
    rt terex conex.jpg rt terex conex.jpg 2.jpg rt terex conex 3.jpg rt terex conex 4.jpg
     
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  2. crane operator

    crane operator Senior Member

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  3. kshansen

    kshansen Senior Member

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    Well I learned the hard way that you never put out the boom on a rubber tired hydraulic crane without the outriggers/jacks out and down!

    I borrowed the company's little Koehring Bantam crane to set some trusses when I was building my garage 20 some years ago. Parked it half way between the stack of trusses and the garage that already had 6 of the trusses in position. I was in a hurry as we were going out to dinner in a short time so Just to check my positioning I swung the boom over to the right to the stack of trusses. Good easy reach. Then swung over to the garage, a little bit further away so I started to boom out to check my reach. Any guess on what happened?

    Only good news is after chopping the already installed trusses in half and splitting the end wall down the middle the crane was only at about a 30ยบ angle. Figured I could not do any more damage to the garage I put some down pressure on the boom and once the truck frame was back to level I put out the jacks on the left side then I was able to lift the boom up and put it back in it's cradle. I then took the crane back to work and parked it. figured that was the best place for it and once the end wall and damaged trusses were repaired we installed them by hand. No damage to crane and it was back doing it's normal work Monday morning.
     
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  4. Tradesman

    Tradesman Senior Member

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    Although I've never done anything as careless as that, it made me think how many careless or absent minded things I've done over the past six or seven years since I started operating a crane on a semi regular basis
    . Boomed over the front of my Terex 4792 when my charts clearly said don't, it lifted the rear tires right off the ground.
    . Trusted an untested rigger and didn't check his work and sliced a sling in half on a sharp edge
    . Grabbed my "boom out control" instead of my "swing control" and pulled the nails out of a set truss
    . Would have two blocked several times over the years if not for my functioning a2b.
    . When talking to a customer I crawled up in the cab and lifted the boom out of the cradle, without outriggers down. I immediately felt it unstable and whoad up
    .this winter I set up for a job with the truck cab close to the wires I got out of the crane cab a couple times and checked that I had enough clearance but still just cleared the boom cradle and slewed around away from the wires. Did my picks and when I was stowing the boom I just swung around and set it in the rest as per usual without giving the wires any thought, all was good it went up without trouble and came back down ok, but I didn't give the wires thier due respect. I scarred the crap out of myself.
    There isn't one thing on the list that I've done a second time ( except almost two blocking ) and I check my a2b every time I set up.
    Confession is good for the sole o_O
     
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  5. Knepptune

    Knepptune Senior Member

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    Makes you wonder if the crane was in rigging and travel mode. I don't know why you would run that boom all the way out. Also why not run your outriggers out to at least stop you, if you start to go sideways. If you gonna be dumb at least be smart about it.


    Tradesman, your boom out incident made me smile. I may have gotten some dirty looks due to that once upon a time.
     
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  6. kshansen

    kshansen Senior Member

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    Well at least my screw up was no where as bad as another guy in the company.

    This guy was a "crane operator" they had moved a truck crane, P&H I believe, to a site to do some repair work on a crusher. Story as I have been told is the A2B was turned off for transport/set-up? Anyhow outriggers down and he was booming out to get over the load with ground guy directing him. While ground guy was directing the operator another guy walks up and starts talking to the ground guy. Crane operator keeps booming out. I'm sure you know what happened next. Cable snaps headache ball and hook hits the ground guy and cable slaps the guy who was talking to him.
     
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  7. Tugger

    Tugger Well-Known Member

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    //it happens.My early days on a crane,a 20 ton Grove rt brand new arrives at the shop. Shop super says anyone know how to run this thing.As a young welder back in the 70 s of course I volunteered. My scare was was trying to pack the machinery deck of a 7220 American to the upper yard behind the shop. It was too heavy to pack with the crane so being good loggers we just got the 966 on the front of the loader and the Grove on the other end ,no problem .Until going up the hill I pushed to hard with the crane even with a short boom started to swing as the right front side wheel came off the ground rear wheel about to do the same . backed off on the throttle and rolled back ,with the loader still pulling everthing luckily came back into lead and settled down. Probably seconds away from catastropy.Gave me respect for Tandem lifts to this day,even if you would never combine a crane and a wheel loader today
     
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  8. kshansen

    kshansen Senior Member

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    More than once I helped move some crushers or part of crushers with a pair of front end loaders, maybe a 988 Cat and a WA600 Komatsu.

    Never had a problem but was important to have the other operator be a nice calm person. One thing I always made a point to do was tell the ground people that I was only going to follow the direction of one guy most of the time that was Ernie, working group leader at the quarry, last person I wanted to pay attention to was the boss, they can get too excited!
     
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  9. Kiwi-truckwit

    Kiwi-truckwit Senior Member

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    The 25ton Kato rough terrain crane I used to operate had charts for 23m boom over the side, pick and carry. Never tested it, did it over the front a few times and it rocked around enough like that. Had 19m boom on rubber quite often though!
     
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  10. Natman

    Natman Senior Member

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    One day several years ago, when I was still running the 22 ton Manitex 22101S, I unexpectedly was tasked with disposing of the HVAC unit I had just unloaded off the roof. The scrap yard was of course clear across town, and it was the tail end of a long hot day, and I had something 'real important" to do once I was done (but not so important that I remember what it was) so I was in a hurry. At this point I had close to 2,000 hours in the Manitex, in 2 years, so I knew it well enough to know that if I didn't bother with putting outriggers downs, much less out, I could do some things. The scrap yard was tight and real busy, but I was able to back into a place just right, and I was on level pavement, so I boomed straight up, with the boom fully retracted, until I could pick the 700 lb unit off the deck, then I boomed back to the stop, and then proceeded to rotate 180 degrees and set it down directly behind me right behind the bumper, piece of cake! so far so good.

    But meanwhile, I had been noticing a pickup with a long trailer backing out of a long alleyway, and he was doing a bad job of it, and I realized that if I didn't hurry, I'd be waiting several minutes for him to clear the way to the scales. It doesn't make sense now, but at the time it did, so while swinging the boom around 180 degrees to set it into the cradle, to save a few seconds (!) I (of course at this point forgetting the outriggers were neither down or out) also boomed down.

    You can guess the rest, at one point the rig slowly started to tip, and though I was able to make it a "soft" touchdown with no apparent damage, I got slammed up against the cab windshield. Less then 5 minutes later the yard had a big front end loader there, and we were able to gently get it back on an even keel in a controlled fashion. The worst part was when I realized Ted the crane dog was in the air conditioned truck cab, which I had forgotten in all the excitement, he was still there, plastered up against the side window and giving me a look like "now what dad?"
     
    Last edited: Jul 19, 2017
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  11. crane operator

    crane operator Senior Member

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    Just some pictures I spotted a while back. No outriggers out, but a lot of stick out in a pretty flat looking parking lot. grove 635 over 1.jpg grove 635 over 2.jpg grove 635 over 3.jpg grove 635 over 4.jpg
     
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  12. kshansen

    kshansen Senior Member

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    That Grove was just tired and decided to laydown and take a nap!
     
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  13. John C.

    John C. Senior Member

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    I've wondered in the past about companies that rent out cranes without their own operators.

    It wasn't to many years ago that the local Cat Rental Store thought they might rent some boom trucks. They bought a brand new truck with a crane unit that had way too much stick for the size of the truck. First time the unit was rented the operator tipped it over. I guess they figured anyone could run a boom truck. The Store didn't have insurance on the unit as they were self insured and apparently they used their own operator. Big mistake and the truck sat in a back yard for about three years before getting fixed. So far they haven't attempted to go into the lifting business again.
     
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  14. Old Doug

    Old Doug Senior Member

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    I worked at a place that sold cranes the boss took alot of chances we were lucky. I learned alot about cranes. The older ones common sense and seat of the pants fill went a long ways . We got in a newer crane it was involved in 99% of the crane ordeals. I dont remember what brand it was but it was a truck crane with 1 engine i think a v8 Cummins . It wasnt the cranes fault every time but it should have been derated to half of what it was. I was running it my load wasnt going to lift even and i set it down before it was rehooked the load moved and about pulled the crane over . One time i stalled the winch out and extinded the boom i was lifting over the rear that stood the crane up Some one rented it and returned it with the jib out another guy tryed to lift a heavy load and bent the jib . The brakes were frozen released and it rolled down a hill with the boss in the crane cab i ran after it and steered clear of a bad wreck. The boss got a load into its fuel tank and split it open he also dropped a load on his KW. I never tryed using it near of what it was rated at after i had used it and i was very careful with it. After i left there the shop burnt with it in there.
     
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  15. crane operator

    crane operator Senior Member

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    This is a brand new 2021 Grove 8120. One outrigger beam was torched off, and the boom cut about 1/2 way up. Guessing by the damage it got tipped over, bending the outrigger and then they cut the boom off. Most likely this one did have the outriggers out, things just went wrong. It would stink with a brand new rig.

    grove 8120 over 1.jpg grove 8120 over 2.jpg grove 8120 over 3.jpg grove 8120 over 4.jpg
     
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  16. Jonas302

    Jonas302 Senior Member

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    Is there any salvage to something like that? Will the manufacture sell a new boom and re certify it
     
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  17. John C.

    John C. Senior Member

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    That is just sad!
     
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  18. crane operator

    crane operator Senior Member

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    There's a couple guys that buy them and fix and/or part out. A new boom section from grove is expensive. There can be turntable damage, and typically even the sections that aren't buckled, are actually slightly bent. There are "parameters" of allowable bend, and it isn't much.

    It takes a bunch of measuring to make sure the frame and everything else is right also. Most cranes end up a total loss. Insurance company writes a check and the company goes crane shopping, its just not worth the liability.

    I would guess that any of them that are rebuilt, a "slight bend" will get ignored, they will get a good paint job and a quickie inspection and end up at ritchie bros.
     
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  19. JLarson

    JLarson Senior Member

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    Dude was running a container around like that? That's just stupid, spent more on that operation then just having a tow company come move it lol.
     
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