SECTION 7 DRIVE TRAIN
Page 6
TD-25M EXTRA DRESSTA
HYDRAULIC OIL FLOW
Rate of rise valve (14) supplies oil first to the FR port of the range selector valve (13) and then to
the PC port of range selector valve (13).
The main pressurized oil entering the FR port of range selector valve (13) is directed either to the
FC port or RC port and onto the transmission (1) forward or reverse range clutch pack. The
pressurized oil entering the PC port of range selector valve (13) is directed either to the 1C, 2C or
3C port and onto the transmission first, second or third speed clutch pack. A transmission speed
gear is selected by gear shifting valve (11) controlled by suitable buttons of drive train control valve
lever.
For a more complete description and operation of the main regulator valve, the rate of rise valve,
the range selector valve and the drive train control valve, refer to SECTION 7C.
Legend for Fig.’s 7.2 and 7.3
1 Transmission
2. Suction Strainer
3. Drive Train Charge Pump
4. Drive Train Scavenge Pump
5. Pressure Filters
5A. Drive Train Oil Pressure Filters” Warning Light
6. Torque Converter
6A. Drive Train System Oil Temperature Gauge
7. Oil Cooler
8. Suction Strainer
9. Main Frame
10. Switching Valve
10A. Low Transmission Main Pressure and Low Clutch Oil Pressure Warning Light
11. Gear Shifting Valve
11A. 2
nd
Gear Solenoid Valve
11B. 3
rd
Gear Solenoid Valve
12. Drive Train Control Valve
12A. Gear and Range Display
13. Range Selector Valve
14. Rate of Rise Valve
15. Pressure Regulator Valve
16. Pressure Diagnostic Center
17. Drive Train Neutral Lock Solenoid Valve
18. Priority Valve
19. To Steering Control Valve
20. To Steering Drive Lubricating
21. To Lower Steering Valve
22. Hydraulic Dampers
23. Drive Train Electronic Controller
24. Engine RPM Sensor
25. Transmission Input Shaft RPM Sensor
26. FWD&RWD Travel Pressure Switch
27. Ripper Shank Pin Control System Connection
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