Mack 673 Engine Manual

At Mack, we design, build, and deliver the tools and services that support your business success and achieve the results you desire. Founded in 1900 by Jack and Gus Mack in Brooklyn, NY, Mack trucks are now sold and serviced in nearly 30 countries worldwide. Mack is one of North America’s largest manufacturers of medium- and heavy-duty trucks as well as proprietary engines and transmissions ...

The all-new Mack® Granite® delivers uncompromising durability, 540 max HP, and premium comfort engineered to dominate the toughest vocational jobs on earth.

Introducing the all-new Mack® Keystone™. Built for rough terrain, maximum payload, and highway precision—one Class 8 truck engineered to own every lane, every job.

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Mack creates durable, purpose-built trucks like the Mack Anthem® and Pioneer™, offering advanced uptime and driving progress for tough jobs worldwide.

These are the Mack trucks that move and build the world. Our full product lineup includes class 6, class 7, and class 8 trucks for every industry and any job.

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Mack Pioneer™ sets a new standard for long haul with enhanced efficiency, uptime, safety, and comfort, leading the way for future trucking innovation.

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Find a Mack Semi Truck Dealer near you, Mack Trucks New and Used trucks, Service center, Uptime Center, RoadChoice online Semi Parts ordering

The all-new Mack Anthem® delivers more efficiency, more comfort, and more uptime.

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Choose any Mack Truck model and customize the color, exterior, interior, accessories and more with our truck builder / truck configurator tool.

The New 2023 and 2024 Mack Trucks Class 7 and 8 semi trucks for highway sleeper and day cab, construction, refuse and Medium Duty needs. Every Mack truck is designed to be reliable, tough, fuel efficient and ready for whatever the job demands. Check with your local dealer for availability.