Speed Reducer And Speed Differential; Speed Reducer - Yale A7S1 Service Manual

Hydraulic Transmission Case and Torque Converter
engaged, the spacer and the brake shoes of the other
clutch are separated and are lubricated by cooling oil.
When inching pedal operates the inching valve, part of
1. OVERFLOW PRESSURE BUFFER VALVE
2. BUFFER VALVE
3. MAJOR OIL PRESSURE
4. MAJOR PRESSURE ADJUSTING VALVE
5. OVERFLOW VALVE
6. OVERFLOW PRESSURE
7. IMPELLER
8. GUIDE WHEEL
9. TURBINE
SPEED REDUCER AND SPEED
DIFFERENTIAL

Speed Reducer

The speed reducer is located on the front of the
transmission case (see Figure 14). This mechanism
reduces the rotating speed of output shaft and
increased the torque transmitted from the output shaft.
It sends this torque to the speed differential. The
speed reducer is composed of a small spiral bevel
gear on the output shaft, a large spiral bevel gear, and
a small gear shaft. The large spiral bevel gear is
mounted on the small gear shaft through spline while
the two ends of small gear shaft are both supported
16
Figure 13. Transmission Hydraulic Schematic
or most of the oil flowing into clutch is drained to the oil
tank through inching valve, of the oil to torque
converter is the same as in neutral position.
10. TO LUBRICATING OIL CIRCUIT
11. ROUGH OIL FILTER
12. OIL PUMP
13. INCHING VALVE
14. CLUTCH PRESSURE REDUCTION FINISHES
15. CLUTCH PRESSURE REDUCTION STARTS
16. ELECTROMAGNETIC REVERSING VALVE
17. THROTTLE ORFICE
18. FINE OIL FILTER
with tapered roller bearing, and a gasket is used to
adjust the clearance.
8000 YRM 2199