Equipment Type

Sit Front and Center in Caterpillar's New Haul Trucks

Forty- and 50-ton haul trucks offer many improvements and features to lower cost per ton

November 01, 2006

Caterpillar 770 and 772 on the move
Caterpillar's Model 770 and 772 off-highway haul trucks feature an exclusivecenter-mounted cab.

At first glance, Caterpillar's new 770 and 772 rigid-frame haul trucks look remarkably different from the models they replace. Notice the all-new center-mounted cab and body style. The 770's predecessors were the 769D, a 35- to 40-ton truck; and the 771D, which was on the same chassis but designed specifically for quarry work. Model 772 enters a new size class for Caterpillar at 50 tons and is aimed at both construction and quarry markets.

The big question at a recent press event was why Caterpillar would change the traditional cab design. The answer was simple: to meet "voice-of-the-customer" needs. After Cat conducted research on what its customers wanted, the company concluded that a center-mounted cab provided many benefits. First, the larger cab offers walk-in convenience, excellent visibility, improved ingress/egress, and a more comfortable ride. It also features a new ergonomic design and controls layout to reduce operator fatigue. Because the driver's seat has been moved to the center, a training seat is now at the operator's left. In addition, an optional camera system provides rear view through a 7-inch LCD color monitor in the cab.

While in the cab, operators can use Cat Messenger, which provides real-time and stored machine performance and diagnostic data. Also, the Truck Payload Management System allows Messenger to show payload state and weight, loaded travel time, loaded travel distance, and accumulated weight.

The new trucks are powered by Tier III ACERT engines. Model 770 features a 476-net-hp C15, and the 772 uses a 535-net-hp C18. Engines have the MEUI Fuel system, which Cat says combines the technical advancement of electronic control with the simplicity of direct, mechanically controlled fuel injection. Engine service intervals have doubled to 500 hours, mostly due to efficient combustion technology, according to the company. The QuickEvac system, an on-board engine oil evacuation and pre-lube system is now standard. Another standard feature is automatic retarder control, which controls braking on grade and maintains engine speed.

A choice of dual slope and flat floor body systems are available with three different steel liner packages and two rubber liner packages. With five different body-liner systems, the 770 and 772 can be configured for specific applications to achieve maximum capacity.

Trucks are slated to be in production the first quarter of '07. Suggested retail price, including a medium-impact body, is about $690,000 for the 770 and $780,000 for the 772.

Rigid-Frame Truck Specs (44.1 to <55.1 U.S. tons payload)
Manufacturer/Model Payload Rating (tons) Heaped Capacity (cu.yd.) Gross HP Net Machine Weight
Hitachi EH750-2 44.1 36.3 525 78,100
Terex TR45 45.0 34.0 525 81,870
Komatsu HD325-6 47.8 31.4 518 69,700
Caterpillar 772 50.0 41.0 598 81,000

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