Shandong Huashou Transmission Technology Co., Ltd. is one of the leading manufacturers and suppliers of power shift automatic transmission in China. With abundant experience, we are committed to providing high quality customized products with competitive price. Welcome to wholesale bulk durable power shift automatic transmission in stock here from our factory. Also, pricelist is available.
Products Description
The YJ409 uses four planetary gear sets and five disc clutches to provide three forward and three reverse speed ranges. Two planetary sets and their associated clutches control forward and reverse travel, while the other two planetary sets are used for the three speed ranges.
Gear selection is controlled through hydraulic pressure. When the specified two clutches are engaged, the transmission produces the corresponding speed and direction. The forward ratios are 2.33, 1.24 and 0.68, while the reverse ratios are 1.94, 1.03 and 0.56.
For buyers searching for a 220hp power shift automatic transmission, the actual engine output should be checked against the transmission's 162 kW rated input power and 2,961 N·m maximum input torque before selection.
The Power Shift Automatic Transmission receives power from the engine through the hydraulic torque converter, universal joint and input coupling, then transfers it through the planetary gear sets to the output shaft.
Product Parameters
|
Parameter |
Specification |
|
Model |
YJ409 |
|
Transmission Type |
Planetary Power Shift Transmission |
|
Forward Speeds |
3 |
|
Reverse Speeds |
3 |
|
Rated Input Power |
162 kW |
|
Maximum Input Speed |
2,000 r/min |
|
Maximum Input Torque |
2,961 N·m |
|
Forward 1st Ratio |
2.33 |
|
Forward 2nd Ratio |
1.24 |
|
Forward 3rd Ratio |
0.68 |
|
Reverse 1st Ratio |
1.94 |
|
Reverse 2nd Ratio |
1.03 |
|
Reverse 3rd Ratio |
0.56 |
|
Main Oil Pressure |
2.4–2.8 MPa |
|
Pressure Reducing Valve Pressure |
1.2–1.5 MPa |
|
Lubricating Oil Pressure |
0.05–0.15 MPa |
|
Recommended Oil |
No. 6 or No. 8 Hydraulic Transmission Oil |
The above values are listed in the technical parameters and transmission-ratio tables.
Product Features
3 Forward / 3 Reverse Speeds
The transmission provides three forward ratios and three reverse ratios. Forward and reverse operation are controlled through different clutch combinations.
01
Planetary Gear Structure
The transmission contains four planetary gear sets. The first three use single-planet arrangements, while the second planetary set uses a double-planet arrangement.
02
Five Disc Clutches
Four clutches are used as braking clutches to hold the ring gear, while the fifth clutch connects the driving and driven members so they rotate together.
03
Hydraulic Gear Selection
The required gear and direction are obtained by applying hydraulic pressure to engage the specified clutch combination.
04
Defined Oil Pressure Range
The main oil circuit operates at 2.4–2.8 MPa, while the pressure-reducing valve operates at 1.2–1.5 MPa. Lubricating oil pressure is specified at 0.05–0.15 MPa.
05
Product Advantages
One practical feature of this transmission is that the operator does not need a separate mechanical gear arrangement for each forward and reverse range. Hydraulic pressure controls the required clutch combination, allowing the transmission to change its operating ratio through the planetary gear system.
The three forward ratios give the machine different operating ranges for working and travelling. The reverse ratios are separately configured rather than simply reversing the output direction through an external mechanism.
The transmission also incorporates a dedicated closed clutch that can connect the main and driven members for synchronized rotation.
For a Power Shift Automatic Transmission replacement, the original transmission ratio, input power, input speed, hydraulic pressure and clutch configuration are important points to check before installation.
Product Applications
The YJ409 can be considered for construction machinery powertrain applications where a planetary power-shift transmission with three forward and three reverse ranges is required.
Typical application areas include:
- Bulldozers
- Crawler construction machinery
- Earthmoving equipment
- Heavy construction machinery
- Mining-related equipment
- Engineering machinery
- Transmission replacement projects
- Hydraulic power-shift drivetrains
The transmission receives power through a hydraulic torque converter before the power reaches the transmission input shaft, making the torque converter and transmission part of the same powertrain.
Maintenance & Operating Notes
The transmission should be filled with the specified hydraulic transmission oil after the torque converter is installed. During the first filling, the oil capacity of the radiator, filter, oil pipes and torque converter should also be taken into account.
The engine should be started with the transmission in neutral. After the engine, control-oil pressure and lubrication pressure reach normal conditions, the machine can be shifted into gear. During initial engagement, engine speed should not exceed 800 r/min, followed by gradual throttle increase for a smoother start.
The transmission should be shifted progressively rather than skipping directly between gears. Forward/reverse changes should only be made after the machine has stopped.
The oil temperature at the torque converter outlet should not exceed 120°C. If the temperature goes above this level, the machine should be stopped for inspection.
Product Applications
The YJ409 is suitable for machinery requiring:
- Three forward working ranges
- Three reverse ranges
- Hydraulic clutch control
- Planetary power transmission
- High input torque capacity
- Hydraulic torque converter integration
It can be evaluated for both new machinery projects and replacement of an existing power-shift transmission.
Customization Options
For a power shift automatic gearbox replacement or new-machine project, customers can provide:
• Machine model
• Engine model
• Engine rated power
• Engine rated speed
• Existing transmission model
• Original transmission nameplate
• Torque converter model
• Input and output connection information
• Installation dimensions
• Original transmission photos
• Technical drawings
• Required quantity
The existing gear ratios can also be provided if the new transmission needs to match the machine's current drivetrain.
For a 220hp power shift automatic transmission application, the engine output and transmission input requirements should be checked together rather than selecting the gearbox only by horsepower.
FAQ
Q: How many forward speeds does the YJ409 have?
A: The transmission provides 3 forward speeds with ratios of 2.33, 1.24 and 0.68.
Q: How many reverse speeds are available?
A: There are 3 reverse speeds, with ratios of 1.94, 1.03 and 0.56.
Q: What is the rated input power?
A: The rated input power is 162 kW.
Q: What is the maximum input torque?
A: The maximum input torque is 2,961 N·m.
Q: What type of oil does the transmission use?
A: The specified working oil is No. 6 or No. 8 hydraulic transmission oil.
Q: How is gear shifting controlled?
A: The transmission uses hydraulic pressure to engage the specified clutch combination for the required speed and direction.
Q: What should be checked before replacing the transmission?
A: The engine output, input speed, input torque, transmission ratios, mounting dimensions, torque converter and hydraulic connections should be checked against the existing powertrain.
Q: What is the maintenance schedule?
A: The maintenance intervals include 50, 200, 600 and 2,400 operating hours. The 50-hour service includes checking the oil level and control mechanism; the 200-hour service includes cleaning the oil filter; the 600-hour service includes replacing the transmission oil and cleaning the oil pan and filter; the 2,400-hour service involves disassembly and inspection of the transmission and torque converter when necessary.
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