Stay on track with mobile off-road emission rules
Just like all-terrain tires, mobile emission regulations are built for paved and unpaved landscapes. The Environmental Protection Agency (EPA) sets federal emission standards for mobile sources, and the rules extend beyond vehicles on the road. The requirements also apply to off-road mobile sources, ranging from the humble lawnmower to imposing construction equipment.
While most requirements affect off-road vehicle, engine, and equipment manufacturers, certain rules apply to owners and operators. So, before you fire up the forklift or any other mobile off-road source, ensure your equipment complies.
What qualifies as a mobile off-road source?
Mobile sources, according to EPA, include vehicles, engines, and motorized equipment with exhaust and evaporative emissions. There are two types of mobile sources:
- On-road sources, such as passenger and commercial vehicles; and
- Off-road (or nonroad) sources, like chain saws, generators, and excavators.
Nonroad emission requirements are based on the source and emission system types.
Nonroad source | Emission system | Regulations (40 CFR) |
Aircraft | Exhaust | Part 1031 Part 1065 Part 1068 |
Nonroad compression-ignition engines | Exhaust | Part 1039 Part 1065 Part 1068 |
Nonroad large spark-ignition engines | Exhaust Evaporative | Part 1048 Part 1065 Part 1068 |
Locomotives | Exhaust | Part 1033 Part 1065 Part 1068 |
Marine compression-ignition engines and vessels | Exhaust | Part 1042 Part 1065 Part 1068 |
Marine spark-ignition engines and vessels | Exhaust Evaporative | Part 1045 Part 1065 Part 1068 |
Nonroad recreational engines and vehicles | Exhaust Evaporative | Part 1051 Part 1065 Part 1068 |
Nonroad small spark-ignition engines (up to 19 kilowatts) | Exhaust Evaporative | Part 1054 Part 1065 Part 1068 |
How do the regulations impact mobile nonroad source owners and operators?
The rules for owners and operators primarily relate to handling, maintaining, and rebuilding the emission-controlling components on nonroad vehicles, engines, and equipment.
Don’t tamper with emission controls
The regulation at 1068.101(b) bans owners, operators, and everyone else from impeding or removing emission controls from certified mobile nonroad vehicles, engines, and equipment. Examples include using software to increase emissions, removing emission control devices from equipment, and operating engines with incorrect fuel.
It also prohibits anyone from making, selling, or using defeat devices to bypass, impair, defeat, or disable emission controls.
Follow the manufacturer’s instructions
Manufacturers are required to provide emission-related installation and maintenance instructions as well as a warranty that the nonroad engine or equipment complies with EPA’s regulations. Owners and operators are responsible for maintaining the product (1068.110(e)).
Implement these actions to help ensure proper maintenance of your nonroad engine or equipment:
- Follow the manufacturer’s emission-related installation and maintenance guidelines.
- Operate the vehicle, engine, or equipment solely according to the manufacturer’s instructions.
- Understand the terms of the manufacturer’s warranty. In addition to improper maintenance (like using an unauthorized service facility if applicable), other actions can void the warranty, such as using the engine or equipment outside its intended purposes stated by the manufacturer.
Rebuild engines according to the regulations
Anyone who installs or has a rebuilt engine installed in a regulated piece of nonroad equipment must confirm that the engine complies with 1068.120. These are some of the major requirements:
- Only use a rebuilt engine that’s built/rebuilt to a certified configuration that meets the same or more stringent emission standards.
- If you install an engine rebuilt by someone else, check all emission-related components per the original manufacturer’s recommended practice.
- Keep required records for all rebuilt engines (except for certain spark-ignition engines with low total displacement) for at least two years.
Key to remember: EPA regulates emissions from all mobile sources, including off-road vehicles, engines, and equipment.