Hyundai R1250 9 Sm 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 ----------------------------------------------------------------------------------------------------- 2-1 Main Control Valve ------------------------------------------------------------------------------------------- 2-23 Swing Device ---------------------------------------------------------------------------------------------------- 2-56 Travel Device ---------------------------------------------------------------------------------------------------- 2-66 RCV Lever --------------------------------------------------------------------------------------------------------- 2-83 RCV Pedal -------------------------------------------------------------------------------------------------------- 2-90

SECTION 3 HYDRAULIC SYSTEM Group Group Group Group Group

1 2 3 4 5

Hydraulic Circuit -----------------------------------------------------------------------------------------------Main Circuit ------------------------------------------------------------------------------------------------------Pilot Circuit -------------------------------------------------------------------------------------------------------Single Operation ----------------------------------------------------------------------------------------------Combined Operation ----------------------------------------------------------------------------------------

3-1 3-2 3-5 3-11 3-21

SECTION 4 ELECTRICAL SYSTEM Group Group Group Group

1 2 3 4

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

4-1 4-3 4-21 4-29

SECTION 5 MECHATRONICS SYSTEM Group Group Group Group

1 2 3 4

Outline --------------------------------------------------------------------------------------------------------------- 5-1 Mode Selection System ----------------------------------------------------------------------------------- 5-3 Automatic Deceleration System ---------------------------------------------------------------------- 5-6 Power Boost System ---------------------------------------------------------------------------------------- 5-7

Group Group Group Group

5 6 7 8

Travel Speed Control System ------------------------------------------------------------------------Automatic Warming Up System ---------------------------------------------------------------------Engine Overheat Prevention System ------------------------------------------------------------Variable power control system ------------------------------------------------------------------------

5-8 5-9 5-10 5-11


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