NOISE EMISSION CONTROL Fuel System Cutting holes in, or cutting away part of noise insulators. Inspection and Maintenance Instructions Removing or rendering engine speed governor inoperative, allowing engine speed to exceed manufacturer's specifications. Removing hood-mounted noise insulation. The following instructions are based on inspection of the noise control system at regular intervals as indicated in the Noise Control System Maintenance Log on page 5-129. Removing of air signal attenuator on engines equipped with this device.
If, during periodic inspection and maintenance of other systems and components, it is found that parts of the noise control system require attention, we recommend that those parts be inspected at more frequent intervals to assure adequate maintenance and performance. Removing of diesel exhaust fluid tank and system. Inner Fender Shields and Cab Skirts Removing shield or skirts. 5 Cutting away parts of shields, skirts or damaged or loose portions of shields or skirts. Noise Insulating Blankets Removing noise insulators from engine block or from around the oil pan. 5-124 Y53-6077-1B1 (03/17)