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 intervals recommended by the manufacturer to the owner (e.g. not at the intervals recommended for severe service).

The setting of the fuel tank relief valve is identical.

MALB develops, produces and markets main headlamps (including washing systems and levelling controls), auxiliary rear ('third stop') and front lamps, rear lamps and levelling controls.

Maximum lift of valve, angles of opening and closing, or timing details of alternative distribution system, in relation to dead centres:

Maximum, valve lift, opening and closing angles in relation to the dead centres, or data concerning the settings of other possible systems: .

In the case of hydraulic installations, the nominal rating of the drive motor must be such as to ensure maximum output from the pump at maximum pressure in the installation (safety valve setting) having regard to the efficiency of the pump.