Komatsu D21A-7, D21S-7, D21AG-7, D21QG-7, D21PG-7A Dozer Manual

Table of Contents

– GENERAL DESCRIPTION
– Structure and Functions
– Testing and Adjusting
– Disassembly and Assembly
– Maintenance Standard
– Others

GENERAL
This section lists the general machine dimensions, performance specifications, component weights, and fuel, coolant and
lubricant specification charts.

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
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 gives the judgement standards
when inspecting disassembled parts.

TESTING AND ADJUSTING
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at
completion of the checks and repairs.

DISASSEMBLY AND ASSEMBLY
This section explains the order to follow when removing, installing, disassembling or assembling each component,
as well as precautions for these operations.

STANDARD VALUE TABLE
This section explains the standard values for new machine and judgement criteria for testing, adjusting and
troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts
in troubleshooting..