|
|
|
CONEXPO-CON/AGG vehicle highlights
Hardox 400 steel wear surfaces extend body life of Caterpillar quarry trucks
-
A new body design for the Caterpillar 771D and 775D off-highway truck helps each quarry truck deliver the lowest cost per volume. The 771D carries a 40.7-t (44.7-ton) payload and the 775D carries 63.4-t (69.9-ton). Both models have been designed for high production and low hauling costs. The new quarry truck bodies are slightly larger for a better match to common quarry materials, and the design features a 12°, single-slope floor for good load retention. Hardox 400 steel wear surfaces extend body life. Hydraulic system changes allow the torque converter and transmission to share a common sump. The design eliminates a tank and some hydraulic lines, and it allows the torque converter to operate in cooler and cleaner oil. The steering system now includes a load-sensing, pressure-compensated, piston-type pump and a Q-amp steering control unit, which decreases power demand, reduces heat generation, cuts required steering wheel effort, and improves steering wheel cycle time. The hydraulic system changes allowed for enhancements of the operator stations in both trucks.
|
|
|
