Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p20
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 20/59)
Character Range: 659481–662894

failure. The indicator must remain activated while the engine is in operation and shall not be erased without the required maintenance being carried out. Re-setting of the signal shall be a required step in the maintenance schedule. The system must not be designed to deactivate upon the end of the appropriate useful life period of the engine or thereafter.

             4.1.7.4. Any other method which the approval authority determines as establishing a reasonable likelihood that the critical maintenance will be per- formed in-use.

             4.2. Changes to scheduled maintenance

             4.2.1. The manufacturer must submit a request to the type-approval authority for approval of any new scheduled maintenance that it wishes to perform during the service accumulation schedule and thereby recommend to owners of heavy-duty vehicles and engines. The manufacturer shall also include its recommendation as to the category (i.e. emission-related, non-emission-related, critical or non-critical) of the new scheduled mainte- nance being proposed and, for emission-related maintenance, the maximum feasible maintenance interval. The request must be accompanied by data supporting the need for the new scheduled maintenance and the maintenance interval.

             4.3. Non-emission-related scheduled maintenance

             4.3.1. Non-emission-related scheduled maintenance which is reasonable and technically necessary (e.g. oil change, oil filter change, fuel filter change, air filter change, cooling system maintenance, idle speed adjustment, governor, engine bolt torque, valve lash, injector lash, timing, adjustment of the tension of any drive-belt, etc) may be performed on engines or vehicles selected for the service accumulation schedule at the least frequent inter- vals recommended by the manufacturer to the owner (e.g. not at the intervals recommended for severe service).

             4.4. Maintenance on engines selected for testing over a service accumulation schedule

             4.4.1. Repairs to the components of an engine selected for testing over a service accumulation schedule other than the engine, emission control system or fuel system shall be performed only as a result of part failure or engine system malfunction.

             4.4.2. Equipment, instruments or tools may not be used to identify malfunctioning, maladjusted or defective engine components unless the same or equivalent equipment, instruments or tools will be available to dealerships and other service outlets and,

                -          Are used in conjunction with scheduled maintenance on such components,
                and
                -          Are used subsequent to the identification of an engine malfunction.

             4.5. Critical emission-related unscheduled maintenance

            4.5.1.            The consumption of a required reagent is defined as critical emission-related unscheduled maintenance for the purpose of conducting a service accumulation schedule and for inclusion in the maintenance instructions furnished by manufacturers to owners of new heavy-duty vehicles or heavy-duty engines.
            4.5.2.

ANNEX III

CONFORMITY OF IN-SERVICE VEHICLES/ENGINES

           1. GENERAL

             1.1. With reference to type-approvals granted for emissions, measures are appropriate for confirming the functionality of the emission control devices during