The 130-horsepower Caterpillar D4 dozer replaces the Cat D6K2 and has an operating weight of 29,259 pounds. The low ground pressure version (LGP) has an operating weight of 30,882 pounds. The Cat D4 ...

We're back at it with Part 7 of the Cat D4 rebuild—and things are getting messy. More disassembly reveals deeper engine damage than expected. Follow along as we dive into the gritty reality of this ...

In this second part of the D315 direct start conversion for the Caterpillar D4, we continue the process of upgrading and modifying the system for smoother, more efficient operation. Watch as we ...

In our return to this occasional series on machines that have worked above and beyond the call of duty, Emily Padfield talks to James Wright about his family’s Caterpillar D4 crawler. We bought it ...