TIPS FOR HEAVY LIFTING AND RIGGING ENGINEERING TIPS FOR HEAVY LIFTING AND RIGGING ENGINEERING

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As the crane starts to swing faster, the operator would only keep enough pressure on the left swing clutch to keep the crane swinging at the speed he want to maintain.

Inspect the load block and the overhaul ball. We first poured the footings and then started setting large gang forms to construct the piers.

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Wear, crushing, lubrication, etc 2. Most hydraulic cranes will not coast and to swing, the operator meters oil thru the hydraulic motors one way or the other. If the dump point is at a larger radius than the pick up point, the operator will have to boom down during or at the end Should we hook up quiz the degree swing arc.

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Especially when it is quite easy to do so. Boom pendants and swage fittings. Working out exactly how much you can plug in and turn on requires an understanding of Ohms law and also taking into account any voltage drop which can cause a current increase with long lengths of cable!

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A qualified person being someone who by virtue of his education and experience is knowledgeable about cranes, crane maintenance and rigging operations.

I figured that I now had the problem solved, but when I tried to boom up with the first heavy gang form from the second pier, the clutch acted the same way as before.

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After all of the forms were set and the concrete crew started pouring them with a pump, I took the boom hoist clutch out, filed off the layer of grim on the lining and cleaned up the inside of the drum with solvent. To use a suck line effectively, the crane must be located high enough that the suck line clears all obstructions during swinging, i.

Note, that very seldom, does the operator actually apply enough pressure on a swing clutch to lock Should we hook up quiz to the drum flange. This means that the crane must be assembled with components specified by the manufacture and using his assembly procedures.

Check for broken, worn or crushed wire on the boom drum itself with the boom in the horizontal and in the vertical at minimum radius where the heavy loads are more likely to occur. When ever possible, the operation should be set up so that the operator can see the load at all times.

The crane should be set up on crane mats or on a firm surface for the load tests. Some operators use a suck line when pouring concrete. Check to make sure there is a minimum of 5 wraps on each drum when they are at ground level.

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Start the inspection by having the boom laid down in the horizontal with the boom tip and jib tip on the ground. A suck line is a hoist line running fairly horizontal from the front drum on the crane out thru fairleads to a connector link located just above the hook.

These two sections of shaft only rotate when the crane swings. As soon as I saw this I knew that the return spring Define dating yahoo tightened so tight that it was overcoming most of the force from the air can that was required to seat the hoist clutch lining.

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When the operator stops metering oil thru the hydraulic motors, they stops turning. At this point, the boom tip is several feet behind the bucket.

However, excessive tire wear would be noted on the inspection report.

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After each load test, the boom and boom support system including the gantry back legs, etcall wire rope and end terminations, and load blocks should again be thoroughly inspected for signs of structural deformation.

Load test "b" should be performed to verify any structural modifications, repairs, and changes to the configuration of the crane. Cranes being out of adjustment for the work involved can lead to a mishap or accident, i.

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This means that this shaft and both swing clutches are rotating whenever the draw works are turning. If there is any question in the inspectors mind whether a boom section meets the requirements listed above, he should contact the Crane Manufacture for a clarification. He copied the pages on the adjustment of the boom hoist clutch for me and off I went to check the actual adjustment.

The swing clutches are also connected to this second shaft. The internal expanding bands swing clutches are not shown for clarity and only the clutch drums are shown connected to shaft No.

As I was going through the adjustment check, everything checked out pretty well until I came to the adjustment for the return spring on the rod for the air can. There are also times when a kettle, microwave, lights, and a small fridge may be useful on a long camp, as well as a bottle steriliser for babies.

Shafts, bearings and pins. Broken wires will most usually occur right at the end of the swaged socket rather than in the body of the pendant itself. As soon as the bucket is stopped in front of the dump man, the operator reverses the swing clutches and swings the boom tip quickly to the left over the bucket and it is stilled, i.

I made the correct adjustment and waited with anticipation as the carpenters hooked me up to the first gang form.