Hyundai HX900L Crawler Excavator Service Repair Manual

Page 1

CONTENTS SECTION 1 GENERAL Group 1 Safety Hints ------------------------------------------------------------------------------------------------------- 1-1 Group 2 Specifications ---------------------------------------------------------------------------------------------------- 1-10

SECTION 2 STRUCTURE AND FUNCTION Group Group Group Group Group Group

1 2 3 4 5 6

Pump Device ----------------------------------------------------------------------------------------------------Main Control Valve -------------------------------------------------------------------------------------------Swing Device ----------------------------------------------------------------------------------------------------Travel Device ----------------------------------------------------------------------------------------------------RCV Lever --------------------------------------------------------------------------------------------------------RCV Pedal ---------------------------------------------------------------------------------------------------------

2-1 2-21 2-46 2-55 2-72 2-79

SECTION 3 HYDRAULIC SYSTEM Group 1 Hydraulic Circuit ----------------------------------------------------------------------------------------------- 3-1 Group 2 Main Circuit ------------------------------------------------------------------------------------------------------- 3-2 Group 3 Pilot Circuit -------------------------------------------------------------------------------------------------------- 3-5 Group 4 Single Operation ----------------------------------------------------------------------------------------------- 3-12 Group 5 Combined Operation ---------------------------------------------------------------------------------------- 3-22

SECTION 4 ELECTRICAL SYSTEM Group Group Group Group

1 2 3 4

Component Location ---------------------------------------------------------------------------------------Electric Circuit --------------------------------------------------------------------------------------------------Electrical Component Specification ---------------------------------------------------------------Connectors --------------------------------------------------------------------------------------------------------

4-1 4-3 4-22 4-31

SECTION 5 MECHATRONICS SYSTEM Group Group Group Group

1 2 3 4

Group Group Group Group Group

5 6 7 8 9

Outline --------------------------------------------------------------------------------------------------------------Mode selection System -----------------------------------------------------------------------------------Automatic Deceleration System --------------------------------------------------------------------Power Boost System ----------------------------------------------------------------------------------------

5-1 5-3 5-6 5-7 Travel Speed Control System -------------------------------------------------------------------------- 5-8 Automatic Warming Up System ----------------------------------------------------------------------- 5-9 Engine Overheat Prevention System -------------------------------------------------------------- 5-10 Variable power Control System ----------------------------------------------------------------------- 5-11 Attachment Flow Control System -------------------------------------------------------------------- 5-12


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