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Off-Highway Trucks

Caterpillar builds Off-Highway Trucks specifically for work in mines, construction and quarries. Our Off-Highway Trucks are pass-matched with Cat Wheel Loaders and Hydraulic Excavators to speed cycle times and maximize productivity.

770 Off Highway Truck

Top Performance. Developed specifically for construction, mining, and quarry applications, the 770 optimizes demands for lower cost per ton, challenges of finding skilled labor, and overall health and safety. Reliable, Durable, Dependable. Rugged construction and easy maintenance procedures ensure long life with low operating costs.

Product Details

Operating Specifications

Nominal Payload Class (100%) 36.3 tonnes
Top Speed – Loaded 74.8 km/h
Body Capacity – SAE 2:1 25 m3
Target Payload Capacity 36.3 tonnes


Engine Model C15 ACERT
Rated Engine Speed 1800 RPM
Gross Power – SAE J1995 381 kW
Net Power – SAE J1349 355 kW
Net Power – 80/1269/EEC 355 kW
Number of Cylinders 6
Bore 137 mm
Stroke 171 mm
Displacement 15.2 L
Net Power - ISO 9249:1997 355 kW
Peak Torque 2320 N·m

Weights – Approximate

Target Gross Machine Operating Weight 71210 kg
Chassis Weight 24213 kg
Body Weight 9999 kg

Capacity – Dual Slope – 100% Fill Factor

Struck 16.4 m3
Heaped 2:1 (SAE) 25.1 m3

Capacity – Flat Floor – 100% Fill Factor

Struck 16.4 m3
Heaped 2:1 (SAE) 25.1 m3

Weight Distributions – Approximate

Front Axle – Empty 48 %
Front Axle – Loaded 34 %
Rear Axle – Empty 52 %
Rear Axle – Loaded 66 %


Forward 1 12.1 km/h
Forward 2 16.6 km/h
Forward 3 22.5 km/h
Forward 4 30.3 km/h
Forward 5 40.9 km/h
Forward 6 55.2 km/h
Forward 7 74.8 km/h
Reverse 15.9 km/h

Final Drives

Differential Ratio 2.74:1
Planetary Ratio 4.80:1
Total Reduction Ratio 13.15:1


Brake Surface – Front 1395 cm2
Brake Surface – Rear 40266 cm2
Brake Standards ISO 3450: 1996

Service Refill Capacities

Fuel Tank 530 L
Cooling System 114 L
Differentials and Final Drives 83 L
Steering Tank 34 L
Steering System (Includes Tank) 56 L
Brake / Hoist / Fan Hydraulic Tank 155 L
Brake/Hoist/Fan System (Tank) 277 L
Crankcase 34 L
Transmission / Torque Converter System (Includes Sump) 72 L
Transmission/Torque Converter Sump 53 L

Body Hoists

Pump Flow – High Idle 515 L/min
Relief Valve Setting – Raise 17255 kPa
Relief Valve Setting – Lower 3450 kPa
Body Raise Time – High Idle 9.5 Seconds
Body Lower Time – Float 12.5 Seconds
Body Power Down – High Idle 12.5 Seconds


Effective Cylinder Stroke - Front 234 mm
Effective Cylinder Stroke - Rear 149 mm
Rear Axle Oscillation 5.4 Degrees


Sound Standards .


ROPS/FOPS Standards .


Height - Top of ROPS 3911 mm
Overall Body Length 8172 mm
Inside Body Length 5549 mm
Overall Length 8740 mm
Wheelbase 3960 mm
Rear Axle to Tail 2590 mm
Ground Clearance 680 mm
Dump Clearance 464 mm
Loading Height – Empty 3120 mm
Inside Body Depth - Max 1326 mm
Overall Height – Body Raised 8280 mm
Operating Width 4751 mm
Centerline Front Tire Width 3110 mm
Engine Guard Clearance 673 mm
Outside Body Width 3960 mm
Inside Body Width 3698 mm
Front Canopy Height 4140 mm
Rear Axle Clearance 508 mm
Centerline Rear Dual Tire Width 2536 mm
Overall Tire Width 3693 mm


Steering Standards ISO 5010:1992
Steer Angle 40 Degrees


Standard Tire 18.00R33 (E4)

Power Train – Engine

The Cat® C15 engine with ACERT™ Technology uses advanced engine technology to reduce emissions without after-treatment. The turbocharged, aftercooled 6-cylinder engine has faster response for superior performance in demanding applications.

Power Train – Transmission

The Cat seven-speed power shift transmission matched with the Cat C15 engine with ACERT Technology provides constant power and efficiency over a wide operating speed range for optimal power train performance.


The 770 features a mild-steel, box-section type frame to deliver durability and long life with low operating costs. Castings and forgings are strategically placed in high-stress areas to evenly distribute stresses and provide long fatigue life.

Operator’s Station

The 770 features an all new operator station with enhanced visibility, increased operator space and ergonomically designed controls that set new industry standards for operator comfort. All controls and gauges are positioned for optimum efficiency and total machine control.

Engine – Power Train Integration

The Cat Data Link electronically combines engine, transmission, brake and operational information to optimize overall truck performance. Stored diagnostic data can be accessed via the Cat Electronic Technician (Cat ET) service tool to improve troubleshooting and reduce downtime.

Brake System

Front dry disc and rear oil-cooled, multiple disc brakes are now hydraulically controlled, reducing maintenance costs and improving operator control and modulation. They provide exceptional, fade-resistant braking and retarding for maximum performance and productivity in all haul-road conditions.

Truck Body Systems

The 770 offers two body types with six different body liner system selections to accommodate almost any type of application. These body liner systems are designed to maximize strength and durability while providing the lowest cost per ton.

Information and Monitoring Systems

Standard on the 770, the Cat Messenger system provides real-time engine performance and operating data.


Caterpillar sets the standard when it comes to safety in the design and manufacturing of heavy equipment. Safety is not an afterthought at Caterpillar, but an integral part of all machine and systems designs.


The 770 offers 500-hour engine service intervals – 250 hours more than the 769D. Simplified service and maintenance features combined with improved service access are designed to reduce downtime.

Customer Support

Caterpillar® dealers provide unmatched product support, anywhere in the world. With industry-best parts availability and a wide range of maintenance and service options, Cat dealers have what it takes to keep your hauling machines productive.
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