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 .............................................................................................................................

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

K&T Saw Shop 606-678-9623 or 606-561-4983

www.mymowerparts.com

9-18

Table of Contents