Overview
The Komatsu WA65-6, WA70-6, WA80-6, WA90-6, WA100M-6 loader repair service manual provides a technical reference for the covered equipment. Its purpose is to help locate information relevant to inspection, troubleshooting, servicing and repair, as applicable to the supplied publication.
The supplied contents outline identifies H60051 and up (WA65-6, WA70-6, WA80-6, WA100M-6),, H00051 and up (WA90-6), Manuals and Safety. The table below follows the provided section names and selected topics; consult the manual for the exact procedures and specifications.
Important Information: Confirm the applicable serial-number or production range in the supplied documentation before selecting a procedure.
Table of Contents
Komatsu WA65-6, WA70-6, WA80-6, WA90-6, WA100M-6 Manual
Main sections and selected subjects identified in the source documentation:
- H60051 and up (WA65-6, WA70-6, WA80-6, WA100M-6),
- H00051 and up (WA90-6)
- Manuals: Shop Manual
- Safety
- General
- Structure and Functions
- Testing and Adjusting
- Disassembly and Assembly
- Others
- Manual Extract Regulating valve (DA valve)
- The DA valve regulates the control pressure (Pst) from which engine speed on the machine starts to travel.
- At a certain engine speed piston (6) lifts up from the seat and control pressure (Pst) is generated.
- The (Pst) pressure moves the servo piston, which moves the swash plate to the selected travel direction (forward or reverse).
- The remaining oil flows to charge pressure port (Psp) to charge the HST circuit and to PPC.
Serial-Number Applicability
The covered production ranges or serial groups may affect the applicable procedures. Check the identification details on the machine against the source documentation.










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