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The Terex 82-20B was a significant model in the Terex crawler tractor lineup, introduced as an upgrade and successor to earlier 82-20 models. Designed primarily for heavy construction and logging applications, the 82-20B competed directly with machines like the Caterpillar D7F and the International Harvester TD-20C.
Engine and Performance
In the 1970s, a logging outfit in the Pacific Northwest adopted the Terex 82-20B for selective logging operations in dense forest stands. Its moderate size allowed access to narrow logging areas without extensive environmental damage. Equipped with a powerful winch and ripper, the machine efficiently handled rough terrain and heavy loads, becoming a mainstay in the fleet.
Summary List
Engine and Performance
- Powered by a General Motors Detroit Diesel 6V-71T turbocharged V6 engine.
- Initial 82-20 model produced about 180 flywheel horsepower; the 82-20B upgraded this to approximately 205 flywheel horsepower.
- Equipped with an Allison CRT5434 3-speed powershift transmission.
- Top speed was around 7 mph, optimized for steady power and control in tough working conditions.
- The tractor featured an all-welded chassis "tub" design that housed the engine and drivetrain securely.
- Radiator was rear-mounted with a protective cast guard, enhancing durability in harsh environments such as logging and landfill sites.
- Track frames were mounted with pivot shafts and pinned equalizer bars to maintain alignment and isolate shock loads on the final drives.
- Undercarriage incorporated a six-roller track frame with 40-section, 20-inch track shoes.
- Sprockets were segmented for easier replacement to reduce downtime.
- Length: Approximately 13 feet (bare chassis).
- Width: Around 11 feet 1 inch.
- Height: Near 10 feet 11 inches to the top of the ROPS (Roll-Over Protective Structure).
- Operating weight roughly 20 tons when equipped with a blade and ripper.
- Featured a spacious operator deck with ergonomic controls including steering levers and blade/ripper controls situated for ease of use.
- Included a padded, adjustable operator seat and lockable instrument cluster.
- Controls for engine throttle, brakes, and decelerator pedals were appropriately placed for intuitive operation.
- Visibility from the operator’s seat was notably good, enhancing safety and efficiency.
- Wide range of blades including Semi-U, S-Blade, Full-U, and Angle blades.
- Winch options including Carco 80-PS winches served logging applications.
- ROPS cabs with heaters were offered for operator comfort in colder environments.
- Track shoe options up to 26 inches wide for different terrain requirements.
- Early versions featured hydraulic control systems branded as Variacs 200 series.
- Released in 1973, with the 82-20B update appearing in 1976 featuring solid-state electronics and standard ROPS.
- The 82-20 series was well-regarded in logging due to its size, power, and maneuverability.
- Sales initially slow but picked up as the machine proved competitive with established makes.
- The Terex 82-20B was discontinued by 1982, with company restructuring impacting product lines.
- The 82-20 and 82-20B were manufactured in the USA at the Hudson, Ohio plant.
- Flywheel Horsepower: The power output of an engine at the flywheel without accessories.
- Powershift Transmission: Transmission allowing smooth shifting without clutch operation.
- ROPS (Roll-Over Protective Structure): Protective frame or cab protecting the operator in rollovers.
- Track Shoe: Individual plates attached to the track for traction and wear resistance.
- Equalizer Bar: Component balancing track tension and absorbing shocks.
In the 1970s, a logging outfit in the Pacific Northwest adopted the Terex 82-20B for selective logging operations in dense forest stands. Its moderate size allowed access to narrow logging areas without extensive environmental damage. Equipped with a powerful winch and ripper, the machine efficiently handled rough terrain and heavy loads, becoming a mainstay in the fleet.
Summary List
- Engine: GM 6V-71T turbocharged diesel producing 205 flywheel hp.
- Transmission: Allison CRT5434 3-speed powershift.
- Operating Weight: About 20 tons with blade and ripper.
- Tracks: 40-section, 20-inch shoes with segmented sprockets.
- Dimensions: Length 13 ft, Width 11 ft 1 in, Height 10 ft 11 in.
- Features: ROPS cab option, hydraulic blade/ripper controls, adjustable operator seat.
- Common attachments: Various blade types, winches for logging.
- Manufacturing ceased in 1982 amid company changes.
