Product Description

The Caterpillar D8 was one of the most widely deployed heavy crawler bulldozers on North American construction, logging, mining, and public-works projects from the mid-1930s through the late 1980s. According to publicly filed asbestos litigation records, the D8 drivetrain allegedly incorporated woven and molded chrysotile-asbestos brake bands on the steering clutches, asbestos-lined transmission clutch discs, and asbestos friction blocks on the service brakes. Replacement bands and linings were allegedly supplied through Caterpillar dealer parts channels and aftermarket friction houses for decades.

Workers Exposed

Operators, field mechanics, and dealer-shop technicians allegedly encountered airborne asbestos fibers during routine steering-clutch adjustments, brake-band replacement, and clutch-pack teardowns. Compressed-air blow-out of the clutch housing — a standard field practice — allegedly aerosolized worn friction dust into the operator cab and mechanic breathing zone. IUOE operating engineers, heavy-equipment mechanics, construction laborers on grading crews, and road-construction workers all allegedly worked around D8 tractors on highway, dam, pipeline, and strip-mine jobs.