8/10/2019 Extract 351

1/9

20 SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1

604.55.111.00 06 2002

Figure 40

Closed Centre Load Sensing High Pressure HydraulicCircuit 175 and 190hp Models

1. Remote Control Valve

2. Load Sense/Supply Line for Additional Remote Valves

3. Load Sense Shuttle Valve

4. Variable Displacement Hydraulic Pump

5. Mid Mounted Remote Control Valve

6. Front Suspension Control Cylinder

7. Front Suspension Control Valve8. Trailer Brake Valve

9. Electronic Draft Control Valve

8/10/2019 Extract 351

2/9

SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1 21

604.55. 111.00 06 2002

Steering System

Lube Circuit Oil

Trapped Oil

Return To Reservoir

Suction Oil

Charge Pump Pressure

41

System Pressure

Closed Centre Load Sensing High Pressure Hydraulic Circuit 175 and 190 Models

8/10/2019 Extract 351

3/9

32 SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1

Figure 62

Low Pressure Hydraulic Circuit175 and 190 Model Tractors with Power Command Transmission1. Brake Booster Valve

2. Transmission Top Cover

3. OIl Cooler ByPass

4. Lube relief valve

5. Accumulator6. Steering Motor

7. Brake System Accumulator

8. Low Pressure Regulating Valve and Relief Valve

9. ElectroHydraulic Remote

10. Steering / Lube Priority Valve

11. Creeper Solenoid

12. Low Pressure oil distribution Manifold

13. PTO Brake

14. PTO Clutch Lubrication Valve

15. Lift Cylinders16. Rear Differential Lock

17. Four Wheel Drive Clutch

18. Front Differential LOck

19. Oil Cooler

8/10/2019 Extract 351

4/9

SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1 33

604.55. 111.00 06 2002

62

High Pressure / SteeringSystem Oil

Low Pressure Circuit

Lubrication Oil

Return To reservoir

Suction Oil

Brake Pedal Pressure

Static oil

Low Pressure Hydraulic Circuit 175190 Model Tractors

8/10/2019 Extract 351

5/9

38 SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1

Figure 62

Low Pressure Hydraulic CircuitTractors with Power Command Transmission1. Brake Booster Valve

2. Pulse Width Modulating Valve Manifold

3. Steering Priority Valve

4. Transmission Top Cover

5. Low Pressure Regulating Valve

6. Lubrication restriction Solenoid

7. Lubrication Regulating Valve

8/10/2019 Extract 351

6/9

SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1 39

604.55. 111.00 06 2002

71

Steering System

Low Pressure Circuit

Lubrication Oil

Return To reservoir

Suction Oil

Brake Pedal Pressure

Brake Boosted Pressure

Low Pressure Hydraulic Circuit 120155hp Tractors with Power Command Transmission

8/10/2019 Extract 351

7/9

SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1 43

604.55. 111.00 06 2002

Steering, Low Pressure andLubrication Circuit

Tractors withRange Command Transmission

Steering System Oil

Low Pressure Circuit Oil@ 1618 bar (230261 lbf/in2)

Return to Reservoir Oil

1. Steering and Low PressureCircuit Pump

2. Steering Flow Control Valve

3. Differential Lock

4. PTO Engagement Solenoid

5. Low Pressure Regulating Valve

6. Differential Lock Solenoid

7. Four Wheel Drive Solenoid

8. A Clutch PWM Valve

9. B Clutch PWM Valve

10. C Clutch PWM Valve

11. D Clutch PWM Valve

12. E Clutch PWM Valve

13. Oil Cooler ByPass Valve

14. Oil Cooler

15. Lubrication To Pump Drive Gear,PTO and Lift Cross Shaft

16. Lubrication Circuit Relief Valve17. Actuator

Low and High Range Synchroniser

18. ActuatorMedium and Reverse RangeSynchroniser

19. Reverse Range Solenoid Valve

20. Medium Range Solenoid Valve

21. Low Range Solenoid Valve

22. High Range Solenoid Valve

23. Steering Motor

Lubrication Circuit Oil

Suction Oil

79

8/10/2019 Extract 351

8/9

48 SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1

604.55.111.00 06 2002

Steering, Low Pressure andLubrication Circuit

Tractors with Dual Command Transmission

Steering System Oil

Low Pressure Circuit Oil@ 1618 bar (230261 lbf/in2)

Return to Reservoir Oil

1. Steering and Low Pressure Circuit Pump2. Steering Flow Control Valve3. Differential Lock4. PTO Engagement Solenoid5. PTO Brake6. Low Pressure Regulating Valve7. Four Wheel Drive Solenoid8. Transmission Clutch Dump Solenoid9. Reverse Clutch PWM Valve

10. Forward Clutch PWM Valve11. B Clutch PWM Valve12. B Clutch Pressure Switch13. Transmission Low Temperature Switch14. A Clutch Pressure Switch15. A Clutch PWM Valve16. Oil Cooler ByPass Valve17. Oil Cooler18. Lubrication To Pump Drive Gear,

PTO and Lift Cross Shaft19. Lubrication Circuit Relief Valve

20.ActuatorForward and Reverse Synchroniser21. Steering Motor

Lubrication Circuit Oil

Suction Oil

88

8/10/2019 Extract 351

9/9

52 SECTION 35 HYDRAULIC SYSTEMS CHAPTER 1

604.55.111.00 06 2002

Steering, Low Pressure and LubricationCircuit

Tractors with Shuttle Command Transmission

Steering System Oil

Low Pressure Circuit Oil@ 1618 bar (230261 lbf/in2)

Return to Reservoir Oil

1. Steering and Low PressureCircuit Pump

2. Steering Flow Control Valve3. Lubrication Circuit Relief Valve4. Steering MakeUp Valve5. Differential Lock6. PTO Engagement Solenoid7. PTO Brake8. Low Pressure Regulating Valve9. Four Wheel Drive Solenoid

10. Oil Cooler ByPass Valve11. Oil Cooler

12. Lubrication To Pump Drive Gear,PTO and Lift Cross Shaft13. Steering Motor

Lubrication Circuit Oil

Suction Oil

95