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6. OIL FLOW ......................................................................................................................................................... 8-9

6.1 IN NEUTRAL........................................................................................................................................... 8-9

6.2 TURNING TO THE RIGHT .................................................................................................................... 8-9

6.3 TURNING TO THE LEFT..................................................................................................................... 8-10

6.4 MANUAL STEERING............................................................................................................................ 8-10

7. TROUBLESHOOTING................................................................................................................................... 8-11

8. DISASSEMBLY, MAINTENANCE ................................................................................................................. 8-12

8.1 GEAR PUMP ......................................................................................................................................... 8-12

8.2 POWER STEERING UNIT................................................................................................................... 8-14

8.3 STEERING CYLINDER ....................................................................................................................... 8-21

CHAPTER 9 HYDRAULIC SYSTEM.................................................................................................9-1

1. HYDRAULIC CIRCUIT DIAGRAM.................................................................................................................. 9-3

2. STRUCTURE ................................................................................................................................................... 9-4

3. HYDRAULIC CIRCUIT DIAGRAM OF 3-POINT HYDRAULIC SYSTEM............................................................ 9-5

4. HYDRAULIC PUMP ......................................................................................................................................... 9-6

4.1 STRUCTURE OF HYDRAULIC PUMP.................................................................................................. 9-6

4.2 OPERATION.............................................................................................................................................. 9-6

5. OIL FILTER ....................................................................................................................................................... 9-7

5.1 STRUCTURE OF OIL FILTER................................................................................................................ 9-7

5.2 FUNCTION AND OPERATION................................................................................................................ 9-7

6. CONTROL VALVE (MLS VALVE)..................................................................................................................... 9-8

6.1 STRUCTURE............................................................................................................................................ 9-8

6.2 CIRCUIT DIAGRAM ................................................................................................................................. 9-8

6.3 OPERATION PRINCIPLE........................................................................................................................ 9-9

7. RELIEF VALVE (HYDRAULIC BLOCK) ....................................................................................................... 9-12

8. HYDRAULIC CYLINDER .............................................................................................................................. 9-13

9. STRUCTURE AND OPERATION .................................................................................................................. 9-14

9.1 STRUCTURE .......................................................................................................................................... 9-14

9.2 OPERATION............................................................................................................................................ 9-14

10.OUTSIDE HYDRAULIC EXTRACTION ....................................................................................................... 9-18

10.1 HYDRAULIC BLOCK ............................................................................................................................. 9-18

10.2 ACTING VALVE .......................................................................................................................................9-19

10.3 QUICK COUPLER .................................................................................................................................9-19

11.TOP LINK BRACKET DEVICE ..................................................................................................................... 9-20

11.1 STRUCTURE.......................................................................................................................................... 9-20

11.2 OPERATION............................................................................................................................................ 9-20

12.TROUBLESHOOTING................................................................................................................................... 9-21

13.MAINTENANCE SPECIFICATION ................................................................................................................ 9-22

13.1 3-POINT SYSTEM HYDRAULIC PUMP .............................................................................................. 9-22

13.2 RELIEF VALVE ....................................................................................................................................... 9-22

13.3 LINK CONTROL..................................................................................................................................... 9-22

13.4 HYDRAULIC CYLINDER ...................................................................................................................... 9-23

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