Pit & Quarry, February 2014
EQUIPMENT FOCUS EXCAVATING AND DREDGING Cat 374D increases digging forces The 156819 lb 374D hydraulic excavator a direct replacement for the model 365C combines added horsepower stronger hydraulics and greater operating weight to boost overall performance Complementing these design basics are undercarriage improvements a new range of buckets operator convenience features safety enhancements and serviceability improvements Rated at 476 net hp the 374Ds Tier 3 Stage IIIA compliant Cat C15 engine has 18 percent more power than its 365C predecessor Caterpillars ACERT technology equips the C15 with advanced electronic control precise fuel delivery and refined air management to deliver clean combustion and optimum fuel efficiency The electronic engine controller with flexible fuel mapping lets the engine respond efficiently to specific operating conditions which means more work for the customers fuel dollars The C15 s torque characteristics let the engine deliver full power at maximum rpm resulting in efficient hydraulic pump operation and enhanced hydraulic response In addition the turbochargers new titanium alloy compressor wheel increases reliability and performance at higher altitudes The 374Ds implement hydraulic system features a 10 percent increase in flow and a 9 percent gain in main pressure with a resulting boost in hydraulic horsepower The added hydraulic power combines with larger digging arm and bucket cylinders to yield 17 percent higher digging arm forces and 12 percent higher bucket forces on machines with the standard reach boom and arm configuration Cat says www cat com 32 PIT QUARRY February 2014 www pitandquarry com
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