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The 730C EJ giant ... 28 tonnes of payload.
New Cat dumptrucks built to please market
01 December 2013
IN RESPONSE to market demand, the new Cat C-Series articulated dumptrucks – 725C, 730C, and 730C EJ ejector – feature new engines with more power, advanced transmission control, enhanced operator amenities and new serviceability features.
In addition, the automatic traction control feature has been added for the 730C and 730C EJ models.
“The design of the new models centres largely on customer requests for increased productivity, lower operating costs, superior availability, long-term durability, added rimpull/retarding capability, ease of operation, high resale value, and maximum rental margins,” says a spokesman for Caterpillar.
The 725C has a rated payload capacity of 23.6 tonnes, and the 730C and 730C EJ models are rated at 28 tonnes.
The 725C’s Cat C9.3 Acert engine is rated at 314 hp, and the Cat C13 Acert in the larger models has 367 hp.
Compared with predecessor models, the 725C has a four per cent gain in gross power and a 20 per cent boost in gross torque; 730C and 730C EJ models have nearly 16 per cent more gross power and more than a 30 per cent gross torque improvement.
The Cat 6F/1R power-shift transmission, which electronically modulates clutch-engagement pressures for smooth, positive shifts, now also incorporates Caterpillar Advanced Productivity Electronic Control Strategy (Apecs).
“The Apecs system improves acceleration, maintains torque-converter lock-up (and ground speed) during critical shifts, increases rimpull, provides automatic speed-holding, modifies shift points to match operating conditions, and automatically reduces retarding forces on lesser grades in lower gears. The overall net benefits are optimum productivity and optimum control of the truck,” says the spokesman.
For controlling speed on downhill grades, the 730C models employ a new engine-compression brake that provides 60 per cent more retarding power than predecessor models. The 725C uses a fluid retarder with four operating modes. Both systems effectively manage speed and minimise service-brake application for extended brake life.
All three new C-Series models feature full-time, six-wheel drive and are equipped with wet-disc-clutch locks in the axle differentials and the inter-axle differential.
