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OM3072 2/13
CHASSIS SOUND ATTENUATION SYSTEM
OVERVIEW
Preparing For Operation
The safest trucks are those which have been prop-
erly prepared for operation. At the beginning of each
shift, a careful check of the truck must be made by
the operator before starting the engine.
Safety Is Thinking Ahead
Prevention is the best safety program. Prevent a
potential accident by knowing the employer's safety
requirements, all necessary job site regulations, as
well as use and care of the safety equipment on the
truck. Only qualified operators or technicians can
operate or maintain a Komatsu truck.
Safe practices start before the operator gets to the
equipment!
•
Wear the proper clothing. Loose fitting clothing,
unbuttoned sleeves and jackets, jewelry, etc.,
can catch on a protrusion and cause a potential
hazard.
•
Always use the personal safety equipment
provided for the operator such as hard hats,
safety shoes, safety glasses or goggles. There
are some conditions when protective hearing
devices must also be worn for operator safety.
•
When walking to and from the truck, maintain a
safe distance from all machines, even if the
operator is visible.
Components
This document gives instructions about the mainte-
nance of a sound suppression kit for an 830E-1AC
rear dump truck.
There are up to 12 main parts to the system (depend-
ing upon specification):
• Engine side panels
• Engine belly pan
• Radiator attenuator
• Rear-exiting exhaust
• Rear engine compartment enclosure
• Centre deck lining
• Front panel assembly below radiator attenuator
• Grille and hood seals
• Alternator air intake silencer
• Retarding grid attenuation package
• Upper horse collar panels
• Blower duct cover and hoses
Operating Instructions - Section 30
General
Proper service and repair of the sound attenuation
components is extremely important for meeting
sound power noise targets. Some techniques require
the use of tools specially designed for the specific
purpose of servicing the machine. Before carrying
out any servicing or repairs, read all the safety labels
attached to the machine. For the locations of the
safety labels and detailed explanation of the precau-
tions, refer to the truck Operation and Maintenance
Manual.
Maintenance
Refer to the Sound Attenuation System Service Inter-
vals section for scheduled maintenance intervals.
Do not pressure wash the sound attenuation sur-
faces. Malfunction and damage may occur,
reducing the effectiveness of the attenuators.
Measure sound levels of machine during work every
10,000 hours. The sound levels will depend upon the
specification of the attenuation kit. If the reading is
greater than specified, thoroughly inspect all sound
attenuation parts for damage or incorrect installation,
fixing where necessary. If this does not lower the
sound level to an acceptable level, replace perfo-
rated sheeting and acoustic insulation on applicable
panels. Always use the specified absorption material,
use of inappropriate material may reduce effective-
ness and increase risk.
For replacement parts or part numbers, refer to the
parts book for the sound attenuation kit.
Page 30-1
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