HD16DC lifting project.

Ive seen them on a sling which ran under the rails as well as the rear hitch and blade. Came together on a turn buckle over the tractor.

Your baby looks great by the way,,, that cab turned out sweet Morten.

HD16DC, Bobcat 863 Turbo, Oliver 1855, John Deere 855,

Yes it’s a werry big ship last time it’s was a 20 tons Hanomag Dozer they used, but now I have places my bid. They will need the Dozer for 45 hours constant driving. Here is som pic from last time

http://www.youtube.com/watch?v=Blrkvb7nfEU

stand back

HD3

he bailed out in time

HD3

NomoreJohnDeere wrote:

http://www.youtube.com/watch?v=Blrkvb7nfEU

stand back

The error in this lift, was improper calculation:

The lift and radius capacity is correct at inception, however, once you start lowering the load into the hole, you're outfeeding the drum, which is on the BACK side of the nearest support (so the hoisting cable is part of the counterweight)...

And as you outfeed, that cable goes up the boom, through the sheave, hence, transitions from being part of the counterweight side, to the LOAD side.

That wire rope is NOT light... You're seeing about 10,000lbs coming off the counterweight side, and going onto the load side, as a result of lowering that dozer just a few feet lower than where it was lifted at the ground.

Once the back end of the crane got light enough to lift the outriggers, the angle of the boom dropped, which caused the reach to increase, and boom-side load to rise rapidly.

The proper way to determine this lift, is to place the boom over the hole, and lower the headache ball all the way down, then determine what your load capacity is in that circumstance... then make sure you have enough counterweight, support, and machine capacity to make the lift. This crane operator had no business being at the controls of that circumstance- he did not understand the physics of what he was attempting to do.

Shipyard loader cranes have plenty of capacity to do lifts like that, and the operators are picking an order-of-magnitude greater load than the dozer all the time, so having good lift points on the machine is really all he'll need to get the job going.

If it were me, I'd get an approximate of the machine's center of gravity, by laying an old telephone pole in the driveway, and climbing up on it. Find the balance point, and MARK the machine for fore-aft CG.

Center of the CG will be basically ON the centerline of the machine.

Next, I'd find some really stout steel plate... say... 2" thick, and cut it into a shape that allows it to reach around structural housings that support the machine's weight naturally... and make those shapes 'lock' onto the machine by installing bolts to sandwich it. give the shapes a hole big enough to accept a lifting shackle, and no bigger... so that lifting rigging is absolutely unable to be removed without very deliberate removal of pins, and so that it isn't supported by a hook that's open on one side.

Make a lifting rig that ties all four lifting points together and places the crane's lift point substantially higher than the machine's center of gravity, so it'll want to lift evenly.

Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

Thanks jerry, the cab is okay but I don’t have a manifold or exhaust yet because of my illness, I’m planing to take a look at it these week :)

You're dead on about boom'radius error and poor planning! They didn't sit down and do the math, and they certainly left no margin of error in anything.

My field assignments most often involve four precast concrete/steel scale bridge sections where the lightest is 19,500, two at 24,500, and last one is 26,500... and if I'm lucky, I have unobstructed access from alongside the 80' pit. With the decks being 11' wide (5.5 to center) and a 4ft sidewalk, outrigger feet up against the edge still yields radius of 25ft at the shortest reach, so I can never call in anything lighter than 75t. Typically, I'll be stuck reaching in from each end of the hole, so I'm reaching that 26.5k out about 55 feet from the center of rotation.

Every so often, I have to decommission and old set of scale decks, and the 'old school' way of building these things was to assemble all the steel in the pit, then pour it in place (field pour)... which means I've got a single piece 40ft long, 6" thick reinforced concrete and (usually well corroded) 36" high I-beams. Picking it up requires a muscular crane, but even moreso... plenty of care in punching holes through the concrete and basketing lifting cables underneath the deck's beamwork in such a way that the deck doesn't collapse to big ugly pieces under it's own weight. They're usually in the 45-50k range.

The 'worst' I've ever had to do, was place a new scale that had a building alongside and a deep ravine on the other, and in order to have sufficient footprint, the crane couldn't get within 60 feet of the NEAR edge of the building... it came out to 24,500lb load at somewhere over 100 feet from center... on a muddy-gravel parking lot. I think I had Barnhardt out there doing that job, they brought in a lattice-boom system on nine trucks, and another four with counterweights and cribbing.

At full reach of the farthest deck (24,500lbs), we were six inches shy of our target point, and I could hear the alarm going off in the crane's cab. We ended up setting it down, and 'walking' it the last few with jacks, blocks, and levers. The scary part, was in the middle of the third pick, a little twin engine executive jet buzzed over the top of the boom... that's when I realized there was an airfield somewhere downrange... took some frantic calling to advise the tower that we had a stick up off the end of their active approach... Nuke

But I've never, ever, ever had crane or lifting mishaps. I had one out in Laramie stall from a plugged-up fuel filter for two hours, and had to shut down for an hour to wait out a storm, but never had any mishaps... and each morning I get suited up to do an install, I pray for a safe lift, and when that day is done, I say thanks for safety and a good meal.

I'm surprised the crane-op was able to exit and clear the tumbling machine... but it makes me wonder wether he was 'well-experienced' with bailing out of a crane, and if so, why? Captains' careers tend to end when the cockpit falls below the waterline, regardless of wether they're still at the helm, or not...

Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

Its a good idea for sure, but I think it’s too expensive in iron and welding, and it needs to get transported to the harbor as well. I think it ends up with some proper certificate lifting eyes, and a prof welder to stick them on the main frame.

It’s have to be realative easy to hook it up because the ship have 6 cargo rooms and therefore there are gonna be some transportation

Morten.have wrote:

Thanks jerry, the cab is okay but I don’t have a manifold or exhaust yet because of my illness, I’m planing to take a look at it these week :)

Good luck with the manifold Morten. I lucked out on mine and was able to get it re welded.

HD16DC, Bobcat 863 Turbo, Oliver 1855, John Deere 855,

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