10-i
SECTION 10
CONTENTS
HYDRAULIC SYSTEM
.................................................. 1
• INTRODUCTION................................................................. 1
OPEN CENTER (OC) HYDRAULIC SYSTEM
.............. 2
• OPEN CENTRE HYDRAULIC DIAGRAM (1/3)..................... 4
• OPEN CENTRE HYDRAULIC DIAGRAM (2/3)..................... 5
• OPEN CENTRE HYDRAULIC DIAGRAM (3/3)..................... 6
• A. LUBRICATION CIRCUIT ................................................. 7
• B. OIL LEVEL MAINTENANCE CIRCUIT ............................ 7
• C. STEERING AND POWER SHIFT CONTROL CIRCUIT .. 8
• D. AUXILIARY SERVICES CIRCUIT ................................... 9
LOAD SENSING (LS) HYDRAULIC SYSTEM
............ 10
• LOAD SENSING HYDRAULIC DIAGRAM (1/3) ................. 12
• LOAD SENSING HYDRAULIC DIAGRAM (2/3) ................. 13
• LOAD SENSING HYDRAULIC DIAGRAM (3/3) ................. 14
• A. OIL LEVEL MAINTENANCE CIRCUIT .......................... 15
• B. STEERING AND POWER SHIFT
CONTROL CIRCUIT ..................................................... 15
• C. AUXILIARY SERVICES AND
LUBRICATION CIRCUIT.............................................. 16
AUXILIARY SERVICES CIRCUIT PUMP
(OPEN CENTRE)
......................................................... 17
OIL LEVEL MAINTENANCE CIRCUIT PUMP
........... 18
VARIABLE DISPLACEMENT PUMP (LS Version)
... 19
AUXILIARY SERVICES CONTROL VALVE
(OPEN CENTRE)
......................................................... 32
• DEFINITIONS OF VALVE ELEMENTS ............................... 33
• CONTROL VALVE TYPES ................................................ 34
• DESCRIPTION OF COMPONENTS.................................. 36
AUXILIARY SERVICES CONTROL VALVE
(LOAD SENSING)
........................................................ 38
• DEFINITIONS OF VALVE ELEMENTS ............................... 39
• CONTROL VALVE TYPES ................................................. 40
• DESCRIPTION OF COMPONENTS................................... 42
POWER SHIFT CONTROL VALVE
............................. 43
MAIN CLUTCH CONTROL VALVE
............................ 52
SERVICES CONTROL VALVE
.................................... 53
RANGE GEARBOX CONTROL VALVE
...................... 54
PRIORITY VALVE (OC version only)
......................... 55
POWER STEERING
.................................................... 56
TRAILER BRAKING VALVE
........................................ 57
• ITALY VERSION ............................................................... 57
• EXPORT VERSION ........................................................... 60
POWER SHIFT TRANSMISSION
............................... 63
FRONT AXLE
.............................................................. 81
REAR AXLE
................................................................. 83
REAR PTO
.................................................................. 85
REAR POWER LIFT
.................................................... 90
BRAKING SYSTEM
..................................................... 95
HYDRAULIC FRONT AXLE SUSPENSION
............. 101
FRONT SUSPENSION CONTROL VALVE
............... 102
CONTENTS
