EARTH MOVER TRUCK DRIVER
After all, mines aren't usually anywhere near civilization, so when Cat delivers a new 797, it arrives in pieces aboard 12 semis, which is to say, "some assembly required." Throw in driver retraining and a fuel depot that can fill the 797's 850- or optional 1800-gallon tank, and the commitment is obvious. The mining roads they operate on, for instance, must be three times the width of the widest truck running on them, and the service shops often need enlarging and reequipping. PLANET R-RANDY LORENTZEN | Car and Driverīeyond the 797's cost of $3.4 million, mine operators need to make serious infrastructure changes to accommodate it.
When shovels grow again, so will the trucks. And 400 tons is roughly the weight of 120 Ford Excursions. So the 797 carries a nominal load rating of 360 tons, but it's capable of accepting 400 tons. Now shovels are in the 90-to-100-ton range, and efficient mine owners need trucks that swallow 360 to 400 tons. When the world's biggest shovels were grabbing the planet in 60-ton scoops, the trucks built to haul stuff away were rated at four shovelsful. The 797 is this big because the machines built to tear open the Earth have grown ever larger. And with 12,170 pound-feet of torque available from the 117-liter, V-24, quad-turbo diesel, either 797 could rip Madison Square Garden off its foundation and tow it across Manhattan and into the East River. But most gym floors aren't reinforced to withstand their 560,000-pound weight when empty, much less the 1,280,000-pound total when burdened with 360 tons of rocks and dirt.
At 30 feet wide, park the left side even with that basket and the right side will be eight feet past the three-point line. Nose the front end of one up to an NBA backboard, and the rear will stick out eight inches past half-court (that's 47 feet 8 inches). They stand 23 feet 9 inches tall when the dump bodies are down, and 49 feet 3 inches when they're tilted up, which means they dwarf the 240-ton 793C that used to be Cat's biggest truck. 45-Ton All-Electric Dump Truck: World’s Biggest EVĪs we approach the two prototype 797s in the yard of Caterpillar's Arizona training facility, their scale seems otherworldly.has technical facts on the repair of truck and OTR tire repairs available upon request.Construction Vehicles, and Four-Wheeled Oddities It is the partnership between the skill and art of properly preparing and patching the area of the tire injury and vulcanizing it subsequently with the proper equipment that will guarantee a perfect repair consistently. The rubber is not cured under compression and will not flow and therefore will be less wear resistant. If the patching is rough, it will come out that way. Most importantly the repair will come out of the Autoclave exactly the same way it was put in.
EARTH MOVER TRUCK PATCH
Heating up the complete tire and holding it at cure temperature till cured rather than just the patch area certainly does not improve the quality of the tire and its life span. The energy consumed by an Autoclave, which has to heat up the complete tire to curing temperature and hold this temperature (particularly for large OTR Tires) is very high and costly. The chances for this type of repair to stand up are better than the chemical patch but still relies on the quality of the operator and his ability to eliminate air pockets between the patch and the casing. On the other hand, due to the fact that there is no flow in this process, i.e., again how the patch is stitched in is the way it will remain. The problem, of course, with an autoclave is the high cost of the autoclave and particularly for the large diameter tires required, such as 40.00 x 57 and larger.Īssuming that an uncured patch is used on a tire to be cured in an autoclave and the patch is stitched very carefully onto the inside of the tire, the possibility of air pockets between the patch and the inner liner is substantially less. Autoclave repair of truck or earth mover OTR tires
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