You don't often see a steel track crawler power harrowing, although some Track Marshall brochures featured their crawlers doing just that. Here a 1988 Track Marshall 155 is working a 4m Lely Roterra power harrow in late spring. The 155 was the last popular British-made steel track crawler. It boasts 155hp from a turbocharged Perkins 6.354.4 engine.
From the Steel Tracks at Work DVDs, available here: anglianagrimedia.co.uk/staw.html