- •Preface
- •Overall Dimension
- •Chapter 1 Use and Specifications
- •3. Engine
- •4. Powertrain system
- •5. Brake system
- •6. Hydraulic steering system
- •7. Implement hydraulic system
- •8. Electrical system
- •Chapter 2 Operation
- •1. Operation mechanism and instruments
- •Figure 2-1 Operation mechanism and instruments
- •Figure 2-2 Speed Selector
- •Figure 2-3 Implement control
- •Figure 2-4 Parking brake control lever
- •2. New vehicle break in
- •3. Operation
- •3.1 Precaution:
- •3.3 Fuel, lubricant, grease and coolant
- •3.4 Inspection and maintenance before daily operation
- •3.5 Inspection and maintenance after daily work
- •3.6 Start, park and work
- •3.7 Working
- •Figure 2-5
- •Figure 2-6
- •Figure 2-7
- •Figure 2-8
- •Figure 2-9
- •4. Lubrication
- •4.1 Precaution for filling oil/grease:
- •4.2 Type of lubricant (see Table 2-1)
- •4.3 Fill oil and grease
- •Figure 2-10 Chapter 3 Main Components
- •1. Diesel Engine
- •2. Torque Converter
- •Figure 3-1 Torque converter & transmission
- •3. Transmission
- •3.1 Structure and driving principle:
- •3.2 Hydraulic system of torque converter and transmission
- •3.3 Maintenance of torque converter and transmission
- •Figure 3-3 Speed control valve
- •4. Drive shaft and axle
- •Figure 3-4 Correct mesh of spiral bevel gear
- •5. Hydraulic Steering System
- •Figure 3-6 Steering system schematic diagram
- •Figure 3-7 Structure of vle-150 priority valve
- •1.Relief valve 2.Control spring 3.Stem 4.Valve body
- •I. Spring II. Pin III. Connecting shaft IV. Control/amplification valve V. Cycloidal gearing
- •1.Spool 2.Valve sleeve 3.Valve body 4.Rotor 5.Stator/rotor
- •6. Implement and frames
- •Figure 3-10 Implement
- •F Front frame Rear frame Oscillating suspension igure 3-11 Frames
- •7. Implement hydraulic system
- •Figure 3-12 Implement hydraulic system
- •1. Oil tank 2.Implement pump 3.Distributor valve
- •4. Lift cylinder 5.Tilt cylinder
- •Figure 3-13 Distributor valve
- •Figure 3-18 Bucket dump
- •Figure 3-19 Overload complementary valve
- •Figure 3-20 Implement oil tank
- •Figure 3-22 Working principle of implement pump
- •Figure 3-23 Lift cylinder
- •10. Piston rod damp ring 11. Direction bush 12. Piston rod direction guide ring
- •Figure 3-24 Tilt cylinder
- •8. Brake system
- •Figure 3-25 Brake system
- •Figure 3-26 Relief valve
- •Figure 3-27
- •Figure 3-28 Booster pump
- •Figure 3-29 Disc brake
- •9. Electrical system
- •Chapter IV Wheel loader lifting and transportation instruction
- •1. Wheel loader lifting
- •2. Transportation of Wheel loader
- •3. Ocean transportation of wheel loader
- •Figure 4-3 Shipment of Wheel Loader Chapter 5 Periodic maintenance
- •Chapter 6 Troubleshooting
- •Chapter 7 Safety precaution
3. Transmission
3.1 Structure and driving principle:
Transmission, torque converter, diesel engine are combined as integral (see figure 3-1).
Transmission consists of case, overrunning clutch, planetary speed change mechanism, friction clutch, cylinder piston, transmission pump, speed control valve, oil filter, shaft, gear, etc.
Torque converter pump wheel (10) and housing wheel are joined with diesel flywheel as a unit with spring plate and rotate with engine at the same speed. The power of engine is transferred to the pump wheel (10), then transferred to the first stage turbine (7) and the second stage turbine (8) via oil.
Power from the second stage turbine (8) of torque converter is transferred to transmission input gear via second stage turbine output gear (4). Power from the first stage turbine of torque converter is transferred to the first stage turbine output gear (3), then to the large overrunning clutch outer ring (15).
When external load is small, since the speed of transmission input gear is faster than that of the large overrunning clutch outer ring (15), large overrunning clutch roller (13) is loosened, large overrunning clutch outer ring (15) is running idly. At this point, the second stage turbine (8) works individually.
When external load is increased, speed of transmission input gear is decreased gradually. If speed of transmission input gear is slower than that of large overrunning clutch outer ring (15), roller (13) is clamped, power from the first stage turbine is transferred to large overrunning clutch cam (14) via roller (13). The cam (14) and input gear are joined with bolts, so at this point the first stage turbine and second stage turbine are working simultaneously.
This transmission is a hydraulic shift transmission with two speeds forward and one speed reverse.
Forward speed I: Speed I piston (32) moves to left with effect of oil pressure, speed I friction disc (34) is engaged, speed I ring gear (33) is braked, power is transferred from input gear to speed I planet gear (30) via sun gear (17). Because speed I ring gear (33) is braked so that the speed I planet carrier (30) rotates, the power is transferred to the direct speed pressure disc (28) via direct speed flange (29), then to the intermediate shaft output gear (23) via direct speed cylinder (25), and then outputted as speed I power.
Forward speed II: piston (26) moves to left with effect of oil pressure, direct speed friction disc (27) is engaged, power is transferred from input gear to the direct speed shaft via sun gear (17). Due to the engagement of direct speed friction disc (27), power is transferred to the direct speed pressure disc (28), then to the intermediate output gear (23) via direct speed cylinder (25) and outputted as speed II power.
Reverse speed: reverse piston (36) moves to right with effect of oil pressure, reverse friction disc (35) is engaged which cause reverse planet carrier (18) to brake. Power is transferred from input gear to reverse planet gear (16) via sun gear (17). Because reverse planet carrier (18) is braked, power is transferred to speed I planet carrier (30) from reverse ring gear (19) with speed change, then transferred to the direct speed pressure disc (28) via direct speed flange (29), to intermediate output gear (23) via direct speed cylinder and outputted as reverse power.
Transmission is equipped with three oil pumps. As the torque converter pump wheel (10) is connected with transfer gear (11), transfer gear (11) is also meshed with transmission pump input gear (5) and steering pump driving gear (38). Implement pump (1) and transmission pump (2) are driven by transmission pump input gear (5), steering pump (37) is driven by the steering pump gear (38).