Komatsu PC800-8 LOADING SHOVEL Manual

PC800 -8
PC800LC -8
SERIAL NUMBER
PC800-8 - 50001
and up
PC800LC-8 - 50001 and up
HYDRAULIC EXCAVATOR
Unsafe use of this machine may cause serious injury or
death. Operators and maintenance personnel must read
this manual before operating or maintaining this
machine. This manual should be kept inside the cab for
reference and periodically reviewed by all personel who
will come into contact with the machine.
Operation &
Maintenance Manual
UEAM005400
WARNING

FOREWORD
11

FOREWORD FOREWORD
1-2
FOREWORD 1
This manual provides rules and guidelines which will help you use this machine safely and effectively. The pre-
cautions in this manual must be followed at all times when performing operation and maintenance. Most accidents
are caused by the failure to follow fundamental safety rules for the operation and maintenance of machines. Acci-
dents can be prevented by knowing beforehand conditions that may cause a hazard when performing operation
and maintenance.
WARNING
Before beginning operation or maintenance, operators and maintenance personnel must always observe
the following points.
Read this manual thoroughly and understand its contents fully.
Read the safety messages and safety labels given in this manual carefully so that they should be under-
stood fully.
Keep this manual at the storage location for the Operation and Maintenance Manual given below so that
all personnel involved in working on the machine can consult it periodically.
In case this manual should be lost or damaged, immediately contact Komatsu or your Komatsu distributor
to obtain a new copy.
When you sell the machine, make sure that this manual should be provided to the new owner together
with the machine.
In this manual, measurements are expressed in international standard units (SI). For the reference pur-
pose, weight units used in the past are also displayed in ( ).
Storage location for the Operation and Maintenance Manual:
magazine box on the left side of the operator's seat.

FOREWORD SAFETY INFORMATION
1-3
SAFETY INFORMATION 1
To enable you to use this machine safely, safety precautions and labels are given in this manual and affixed to the
machine to give explanations of situations involving potential hazards and of the methods of avoiding such situa-
tions.
Signal words
The following signal words are used to inform you that there is a potential hazardous situation that may lead to per-
sonal injury or damage.
In this manual and on machine labels, the following signal words are used to express the potential level of hazard.
.
Example of safety message using signal word
WARNING
When standing up from the operator's seat, always place the lock lever in the LOCK position.
If you accidentally touch the control levers when they are not locked, this may cause a serious injury or
death.
Other signal words
In addition to the above, the following signal words are used to indicate precautions that should be followed to pro-
tect the machine or to give information that is useful to know.
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death
or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury. This word is used also to alert against unsafe practices that may
cause property damage.
NOTICE This word is used for precautions that must be taken to avoid actions which could shorten
the life of the machine.
REMARKS This word is used for information that is useful to know.
DANGER
WARNING
CAUTION

SAFETY INFORMATION FOREWORD
1-4
qSafety labels
Safety labels are affixed to the machine to inform the operator or maintenance worker on the spot when carrying
out operation or maintenance of the machine that may involve hazard.
This machine uses “Safety labels using words“ and “Safety labels using pictograms“ to indicate safety procedures.
Example of safety label using words
Safety labels using pictogram
Safety pictograms use a picture to express a level of hazard-
ous condition equivalent to the signal word. These safety pic-
tograms use pictures in order to let the operator or
maintenance worker understand the level and type of hazard-
ous condition at all times.
Safety pictograms show the type of hazardous condition at the
top or left side, and the method of avoiding the hazardous con-
dition at the bottom or right side. In addition, the type of haz-
ardous condition is displayed inside a triangle and the method
of avoiding the hazardous condition is shown inside a circle.
Komatsu cannot predict every circumstance that might involve a potential hazard in operation and maintenance.
Therefore, the safety messages in this manual and on the machine may not include all possible safety precau-
tions.
If any procedures or actions not specifically recommended or allowed in this manual are used, it is your responsi-
bility to take the necessary steps to ensure safety.
In no event should you engage in prohibited uses or actions described in this manual.
The explanations, values, and illustrations in this manual were prepared based on the latest information available
at that time. Continuing improvements in the design of this machine can lead to changes in detail which may not
be reflected in this manual. Consult Komatsu or your Komatsu distributor for the latest available information of
your machine or for questions regarding information in this manual.
The numbers in circles in the illustrations correspond to the numbers in ( ) in the text. (For example: 1-> (1))
Part No.
Part No.

FOREWORD SAFETY INFORMATION
1-5
Noise emission levels 1
Two labels indicating the machine noise level are affixed on the
machine.
qSound pressure level at the operator’s station, measured
according to ISO6396 (Dynamic test method, simulated
working cycle).
qSound power level emitted by the machine, measured
according to ISO 6395 (Dynamic test method, simulated
working cycle). This is the guaranteed value as specified
in European directive 2000/14/EC.
73
108

SAFETY INFORMATION FOREWORD
1-6
Vibration levels 1
When used for its intended purpose, levels of vibration for the
earth-moving machine transmitted from the operator’s seat are
lower than or equal to the tested vibrations for the relative
machinery class in compliance with ISO 7096.
The actual acceleration value for the hands and arms is less
than or equal to 2.5 m/s². The actual acceleration value for the
body is less than or equal to 0.5 m/s².
These values were determined using a representative machine
and measured during the typical operating condition indicated
below according to the measurement procedures that are
defined in the standards ISO 2631/1 and ISO 5349.
Operating condition:
Excavating (Digging-loading-rotating-unloading-rotating)
Guide to Reduce Vibration Levels on Machine 1
The following guides can help an operator of this machine to
reduce the whole body vibration levels:
1. Use the correct equipment and attachments.
2. Maintain the machine according to this manual
qTension of crawler (for crawler machines)
qBrake and steering systems
qControls, hydraulic system and linkages
3. Keep the terrain where the machine is working and travel-
ing in good condition
qRemove any large rocks or obstacles
qFill any ditches and holes
qSite manager should provide machine operators with
machine and schedule time to maintain terrain condi-
tions
4. Use a seat that meets ISO 7096 and keep the seat main-
tained and adjusted
qAdjust the seat and suspension for the weight and size
of the operator
qWear seat belt
qInspect and maintain the seat suspension and adjust-
ment mechanisms
5. Steer, brake, accelerate, and move the attachment levers
and pedals slowly so that the machine moves smoothly

FOREWORD SAFETY INFORMATION
1-7
6. Adjust the machine speed and travel path to minimize the
vibration level
qWhen pushing with bucket or blade, avoid sudden
loading; load gradually
qDrive around obstacles and rough terrain conditions
qSlow down when it is necessary to go over rough ter-
rain
qMake the curve radius of traveling path as large as
possible
qTravel at low speed when traveling around sharp
curves
7. Minimize vibrations for long work cycle or long distance
traveling
qReduce speed to prevent bounce
qTransport machines long distances between worksites
8. The following guidelines can be effective to minimize risks
of low back pain
qOperate the machine only when you are in good
health.
qProvide breaks to reduce long periods of sitting in the
same posture
qDo not jump down from the cab or machine
qDo not repeatedly handle and lift loads

SAFETY INFORMATION FOREWORD
1-8
BREAKING-IN THE NEW MACHINE 1
NOTICE
Your Komatsu machine has been thoroughly adjusted and tested before shipment from the factory. How-
ever, operating the machine under full load before breaking the machine in can adversely affect the perfor-
mance and shorten the machine life.
Be sure to break in the machine for the initial 100 hours (as indicated on the service meter).
Make sure that you fully understand the content of this manual, and pay careful attention to the following points
when breaking in the machine.
qRun the engine at idle for 15 seconds after starting it. During this time, do not operate the control levers or fuel
control dial.
qIdle the engine for 5 minutes after starting it up.
qAvoid operation with heavy loads or at high speeds.
qImmediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden stops,
and sudden changes in direction.