Komatsu D51EX-22 & D51PX-22 Dozer Shop Repair Manual PDF

Manuals: Shop Manual
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
STRUCTURE, FUNCTION AND MAINTENANCE STANDARD . . . . . . . . . . . . . . . . . . . . 10-1
STANDARD VALUE TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1
TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-1
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-1
DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-1
OTHER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1
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.
TROUBLESHOOTING
Troubleshooting charts correlating Problems to Causes are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component,
as well as precautions to be taken for these operations.
OTHER
This section has the foldout drawings for the machine.
ASSEMBLY OF MAIN PISTON
1. Install spool (17) to piston (16).
2. Put O-ring to plug (13) and install plug (13) to piston (16).
3. Put O-ring to piston assembly (16) and install piston assembly (16) to end cover.
4. Install pin (15) and install it with screw (14).
– Check the installed direction of pin (15).
– Check dimension (L6) to confirm that screw (14) is installed in the hole of pin (15).
5. Degrease the threaded parts of the screw and piston thoroughly with trichloroethylene and dry them, and then apply two drops (about 0.04 g) of adhesive to each of them.
– After tightening the screw, do not apply oil for at least one hour until the LOCTITE is hardened.
– After tightening the screw, do not apply pressure for at least six hours.