Cummins Engine Company and Asbestos-Containing Products

Company History

Cummins Engine Company is an American manufacturer best known for producing diesel engines used in commercial trucks, construction equipment, industrial machinery, and marine applications. Founded in Columbus, Indiana, Cummins grew throughout the mid-twentieth century to become one of the dominant suppliers of heavy-duty diesel power systems in the United States. By the postwar decades, Cummins engines were found in long-haul freight trucks, off-highway equipment, agricultural machinery, and stationary power generation units across the country.

During the decades spanning roughly the 1940s through the early 1980s, asbestos was a standard component in a wide range of engine-related parts and systems. The material’s heat resistance, durability, and relatively low cost made it an industry-standard ingredient in gaskets, exhaust systems, and friction components used in heavy-duty diesel applications. Cummins, like virtually every major engine manufacturer of the era, sourced and incorporated components containing asbestos as part of its standard product lines and service parts catalogs.

Cummins has continued to operate as a major engine manufacturer and has evolved its product lines substantially since the period in question. The company, now known as Cummins Inc., did not establish an asbestos bankruptcy trust fund, and asbestos claims against the company have been pursued through conventional civil litigation rather than through a trust claims process.

Asbestos-Containing Products

According to asbestos litigation records, Cummins Engine Company manufactured, sold, and distributed diesel engines and associated service components that plaintiffs alleged contained asbestos in various forms. Court filings document that the following categories of components were central to exposure claims involving Cummins products:

Gaskets and Head Gaskets

Plaintiffs alleged that Cummins diesel engines were assembled with asbestos-containing head gaskets, exhaust manifold gaskets, valve cover gaskets, and other internal sealing components. In heavy-duty diesel engines, gaskets must withstand extreme temperature and pressure cycles, and asbestos-reinforced compressed sheet gasket material was the prevailing industry standard through much of the 1960s and 1970s. Court filings document that mechanics performing top-end engine overhauls — including head gasket replacements — encountered these materials routinely.

Exhaust and Turbocharger Components

According to asbestos litigation records, certain exhaust system components associated with Cummins engines, including turbocharger mounting gaskets and exhaust manifold sealing materials, were alleged to have contained asbestos. Plaintiffs in multiple cases asserted that the service and repair of these systems generated asbestos-containing dust that workers inhaled during routine maintenance.

Clutch Facings and Friction Components

Court filings document claims that clutch assemblies associated with Cummins-powered vehicles and equipment included asbestos-containing friction materials. In commercial trucking and heavy equipment applications, clutch components experience high thermal loads, and asbestos-reinforced friction facings were widely used by the industry during the relevant period. Plaintiffs alleged that mechanics performing clutch replacement work on vehicles equipped with Cummins engines were exposed to asbestos fibers released during the removal and installation of these components.

Rope Seals and Thermal Insulation

According to asbestos litigation records, certain high-temperature sealing applications associated with Cummins engines used asbestos rope packing or woven asbestos sealing materials. These materials were used in areas subject to intense heat and were encountered during teardowns and overhauls by engine mechanics and rebuilders.

It is important to note that, consistent with the industrial practices of the period, many of these components may have been manufactured by third-party suppliers and incorporated into Cummins engines or specified in Cummins service parts catalogs. Court filings in various jurisdictions have addressed the question of manufacturer responsibility for both original-equipment and replacement-parts contexts.

Occupational Exposure

The workers most frequently identified in asbestos litigation records as having potential exposure to asbestos-containing Cummins engine components include a range of skilled trades and industrial occupations:

Diesel Mechanics and Heavy-Equipment Technicians Court filings document that mechanics performing maintenance and overhaul work on Cummins diesel engines — particularly in trucking fleets, construction companies, and mining operations — encountered asbestos-containing gaskets and sealing materials on a regular basis. Operations such as scraping old gaskets from mating surfaces, wire-brushing residue from engine blocks, and handling compressed sheet gasket materials were identified by plaintiffs as significant sources of fiber release.

Truck Drivers and Fleet Maintenance Personnel Plaintiffs alleged that workers employed in trucking and freight operations who performed or observed engine maintenance tasks in shop environments faced bystander-level exposure to asbestos dust generated during diesel engine service work.

Industrial and Marine Engine Mechanics According to asbestos litigation records, Cummins engines were widely used in stationary industrial applications and marine propulsion. Mechanics who serviced these engines in factory settings, powerhouses, and shipyards were identified in court filings as members of occupational groups with potential exposure histories.

Engine Rebuilders and Parts Distributors Court filings document claims from workers employed at independent engine rebuild shops and parts distribution centers who handled Cummins engine components, including replacement gasket sets, as part of their daily work duties.

Construction and Agricultural Equipment Operators Plaintiffs alleged that equipment operators who performed field repairs on Cummins-powered machinery — including bulldozers, graders, and combines — were exposed to asbestos-containing components during roadside or field service operations.

The nature of diesel engine maintenance meant that exposure was often concentrated in enclosed shop environments with limited ventilation, conditions that plaintiffs and their experts have argued compounded the duration and intensity of fiber inhalation. Asbestos-related diseases associated with occupational exposure in these contexts — including mesothelioma, asbestosis, and asbestos-related lung cancer — typically have latency periods of 20 to 50 years, meaning workers exposed during the 1950s through the 1980s may only now be receiving diagnoses.

Cummins Engine Company has not filed for bankruptcy protection and has not established an asbestos bankruptcy trust fund. As a result, individuals with asbestos-related disease claims connected to Cummins products do not have access to a trust claims process. Instead, claims against Cummins must be pursued through traditional civil litigation in state or federal court.

According to asbestos litigation records, Cummins has been named as a defendant in asbestos personal injury lawsuits filed across multiple jurisdictions. Court filings document that plaintiffs in these cases have generally alleged that Cummins knew or should have known about the hazards of asbestos-containing components in its products and failed to provide adequate warnings to workers who serviced those products.

It should be noted that many asbestos claims arising from diesel engine maintenance involve multiple defendants, including manufacturers of replacement gaskets, clutch components, and other friction materials used in conjunction with Cummins engines. This multi-defendant structure is common in asbestos litigation and reflects the reality that mechanics typically worked with products from many manufacturers over the course of a career.

If you or a family member has been diagnosed with mesothelioma, asbestosis, or another asbestos-related disease and has a work history involving Cummins diesel engines — whether as a mechanic, fleet technician, equipment operator, or industrial worker — the following points are relevant to understanding your legal options:

  • No trust fund exists for Cummins-related claims. Compensation must be sought through civil litigation against the company and potentially other defendants.
  • Multi-defendant claims are common. Workers who serviced diesel engines were typically exposed to asbestos-containing products from numerous manufacturers. An experienced asbestos attorney can evaluate which companies may be responsible and whether any of those defendants have established trust funds.
  • Documentation of exposure matters. Work history records, employer records, union records, and coworker testimony can all help establish the nature and duration of contact with Cummins engine components.
  • Statutes of limitations apply. The time permitted to file an asbestos lawsuit varies by state and by the date of diagnosis. Consulting an attorney promptly after diagnosis is advisable.
  • Medical documentation is essential. A formal diagnosis from a physician, along with pathology records confirming the disease type, forms the foundation of any legal claim.

Attorneys who specialize in asbestos litigation can assess whether civil claims against Cummins Engine Company or other manufacturers are viable based on an individual’s specific work history and medical diagnosis. Workers who spent their careers maintaining and repairing heavy diesel equipment during the peak asbestos-use era have been recognized in court filings as members of occupationally exposed populations, and their claims deserve thorough legal evaluation.