Komatsu PC128UU-2 Service Manual
MACHINE MODEL SERIAL NUMBER
PC128UU-2 5001 and up
• This shop manual may contain attachments and optional equipment that are not available
in your area. Please consult your local Komatsu distributor for those items you may require.
Materials and specifications are subject to change without notice.
• PC128UU-2 mounts the S4D102E-1 engine.
For details of the engine, see the 102 Series Engine Shop Manual.
This manual provides rules and guidelines which will help you use this machine safely and effectively. The precautions 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. Accidents can be prevented by knowing beforehand conditions that may cause a hazard when performing operation and maintenance.
Operators and maintenance personnel should observe the following precautions before beginning operation or maintenance.
Read this manual thoroughly and make sure that you understand the contents fully.
Make sure that you understand the content of the precautions and the safety signs given in this manual.
Always keep this manual together with the Operation and Maintenance Manual for the machine in the same location so that the operators and maintenance personnel can read it at any time before operating the machine or carrying out maintenance.
If this manual is lost or damaged, please order a new one immediately from your Komatsu distributor. If you lend this machine to another person, always make sure that this Operation and Maintenance Manual is given together with the machine.
Komatsu PC128UU-2 Service Manual
This manual contains information only for the special super long front attachment for the PC200-7, 200LC-7, 220-7, and 220LC-7, so please refer to the Operation and Maintenance Manual for the standard machine for any parts not appearing in this manual.
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
The following signal words are used to inform you that there is a potentially hazardous situation that may lead to personal injury or damage.
In this manual and on machine labels, the following signal words are used to express the potential level of hazard.
This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgments. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
This shop manual mainly contains the necessary technical information for operations performed in a service workshop. For ease of understanding, the manual is divided into the following chapters; these chapters are further divided into each main group of components.
STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an understanding of the structure but also serves as reference material for troubleshooting.
In addition, this section may contain hydraulic circuit diagrams, electric circuit diagrams, and maintenance standards.
TESTING AND ADJUSTING
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at the completion of the checks and repairs.
Troubleshooting charts correlating “Problems” with “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the procedures for removing, installing, disassembling and assembling each component, as well as precautions for them.
This section gives the judgment standards for inspection of disassembled parts.
The contents of this section may be described in STRUCTURE AND FUNCTION.
OTHERS Komatsu PC128UU-2 Service Manual
This section mainly gives hydraulic circuit diagrams and electric circuit diagrams. In addition, this section may give the specifications of attachments and options together.