HW11708STC
The Datong-Gear HW11708STC Light-Medium Sync Gearbox features an input maximum torque of 1200 N.m, an input maximum speed of 2600 RPM, and a gear ratio range from 9.263 to 0.757. It is lubricated with 85W/90 medium-duty vehicle gear oil (GL-4 grade), requiring 6L of oil. The Overall dimensions 736.7 mm * 451 mm * 432.3 mm. The weight of the gearbox is 191 kg,This gearbox is designed for light to medium-duty vehicles with a power range of 250 to 290 horsepower. (excluding the weight of the lubricating oil; the length refers to the distance from the front face of the clutch to the output flange).
In the detailed model name, “HW” represents the brand. The number “11” indicates 10% of the torque, with 1% used when the torque exceeds three digits. The number “7” signifies the series number for the light to medium-duty transmission series. “08” denotes the number of forward gears. “ST” stands for double intermediate shaft with synchronizer, and “C” represents the overdrive gear.
As part of EMAC, DuraMac provides a complete power system integrating DCEC engine, Fast-Eaton clutch, DaTong-Gear gearbox, Dongfeng-DANA axle and Komman air suspension. With the future trend of automotive electrification, Duramac is also actively developing in the field of electric vehicle power systems.
The company provides customers with full life cycle services, from design to power system supply, installation and commissioning, to after-sales service training and spare parts supply, as well as troubleshooting and overhaul technical support. This full range of services ensures that customer equipment maintains high reliability and long-term operating efficiency during use.
Advantages of HW11708STC Light and Medium-duty Multi-speed Synchronizer Manual Transmission
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The gearbox product design life is up to 800,000 kilometers.
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It adopts a cylindrical housing and horizontal installation.
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The main and auxiliary boxes are double intermediate shaft structures, 4X2 combination, with a total of 8 forward gears and 2 reverse gears.
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The main box adopts synchronizer manual shifting, and the auxiliary box is pneumatically controlled shifting.
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It can use long-term lubricating oil, and the first and fixed warranty is 100,000 kilometers.
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It can cover the engine torque range of 450-1050Nm, and a side power take-off can be installed.
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Fast hydraulic retarder or Voith hydraulic retarder can be optionally installed.
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The comprehensive transmission efficiency can reach 97.02%.
Technical Specifications
| Gearbox Model： | HW11708STC |
| Oil Capacity: | 6 L |
| Maximum Input Speed: | 2600 RPM |
| Maximum Input Torque: | 1200 N.m |
| Torque: | 1200 N.m |
| Overall Dimensions(L * W * H): | 736.7 mm * 451 mm * 432.3 mm |
| Gear Ratio Range: | 9.263 – 0.757 |
| Dry Weight: | 191 kg |
| Lead Time: | 15 – 30 Working Days |
| Payment Terms: | T/T ,L/C |
HW25712XSTL
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DuraMac
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The DFZ5258JSQSZ6D truck crane is a powerful and versatile vehicle designed for efficient lifting and transportation tasks. Equipped with a YCS06300-61 engine and a Shaanxi Auto Fast gear : 10JS120TA high-low gear with synchronizer、PTO gearbox, it provides strong and stable power for demanding operations.
Gearbox Model |
Torque |
Gear Ratio Range |
Maximum Input Speed |
Oil Capacity |
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| HW11708STC | 1200 N.m | 9.263 – 0.757 | 2600 RPM | 6 L | |
| ——END—— | |||||
HW11708STC Gearbox Main Performance Parameters
| Product Model | All Gear Positions Speed Ratio Table |
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| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | R1 | R2 | |||
| HW11708STC | 9.263 | 6.158 | 4.275 | 3.237 | 2.167 | 1.44 | 1 | 0.757 | 8.491 | 1.986 | ||
| Maximum Input Torque | 1200 N.m | Maximum Input Speed | 2600 RPM | |||||||||
| Dry Weight | 191 kg | Lubricating Oil | 85W/90 medium load vehicle gear oil (GL-4 grade), refueling volume 6L | |||||||||
| Gear Ratio Range | 9.263 – 0.757 | Torque | 1200 N.m | |||||||||
| Overall Dimensions(L * W * H) | 736.7 mm * 451 mm * 432.3 mm | |||||||||||
Note:
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Our products are designed and manufactured in strict accordance with industry standards, ensuring the precision of every part’s dimensions to meet the high standards of compatibility, performance, and safety required by our customers. The accuracy of dimensions is crucial for the correct installation and optimal operation of the products; any deviation may lead to installation issues, performance degradation, or even safety hazards. Therefore, we strongly recommend that customers carefully refer to the technical drawings and specifications we provide when purchasing, and select the most suitable product model based on their specific needs and procurement standards. We are committed to delivering high-quality products and exceptional customer service to ensure customer satisfaction and the smooth progress of projects.
The following is the numbering rules of Datong HW11708STC transmission.The main and auxiliary gearboxes of this transmission both adopt a dual intermediate shaft fully synchronized structure, providing strong load-bearing capacity. This transmission has the advantages of reliable structure, flexible and light operation.
Use, Maintenance, and Precautions for HW11708STC Transmission
Requirements for use
Correct and reasonable operation and use of the transmission and regular maintenance are very important to ensure safe and reliable driving of the vehicle and extend the life of the transmission. Please follow the following usage requirements:
1. Lubricating oil brand
The transmission should be filled with 85W/90 (GL-4 grade) vehicle gear oil
2. Correct oil level
The oil level height should be checked through the oil level observation hole on the side of the shell. The oil level height should be flush with the lower edge of the oil level observation hole. The oil injection volume is about 6L (6.5L when a power take-off is installed).
Too much oil will cause the transmission temperature to rise and oil leakage; too little oil will cause poor lubrication of parts, and in severe cases, a box burn accident will occur.
3. Oil level check
The oil level should be checked regularly. When checking the oil level, the vehicle should be parked on a level surface. Due to the volume expansion of hot oil, in order to prevent inaccurate measurements, the vehicle cannot be inspected immediately after driving. It can only be carried out when the oil level is stable and the oil temperature is close to normal temperature.
4. Replenish lubricating oil
To prevent chemical reactions between different types of lubricating oil, it is essential to replenish the lubricating oil with the same model as the original when topping up.
5. Oil change cycle
When changing the lubricating oil in the transmission, the existing lubricating oil inside the transmission must be drained completely first.
The lubricating oil of a new transmission must be replaced when it has traveled 2000 to 5000 kilometers.
The oil level and leakage of lubricating oil should be checked every 10,000 kilometers and replenished at any time.
Lubricating oil should be changed every 30,000 kilometers.
6. Operating Temperature
The maximum temperature of the transmission during continuous operation must not exceed 120°C and the minimum temperature must not be lower than -40°C. If the operating temperature exceeds 120°C, the lubricating oil will decompose and shorten the service life of the transmission.
Any of the following conditions can cause the transmission’s operating temperature to exceed 120°C.
- Operating continuously at a driving speed of less than 32 km/h.
- High engine speed.
- High ambient temperature.
- Vortex Surrounding transmission.
- The exhaust system is too close to the transmission.
- High-power overspeed operation.
7. Working Tilt Angle
When the operating inclination angle of the transmission exceeds 15°, lubrication may be insufficient (the operating inclination angle is equal to the mounting angle of the transmission on the chassis plus the ramp angle).
8. Drag or slide
When the transmission is working, the shaft and gears of the transmission are constantly rotating, which can provide sufficient lubrication for the transmission. However, when the vehicle is towed with the rear wheels on the ground and the transmission system connected, the intermediate shaft gears and main shaft gears of the main box do not rotate, while the main shaft is driven by the rear wheels to rotate at high speed, which will cause serious damage to the transmission due to lack of lubrication.
To prevent such occurrences, the following points should be noted:
Never allow the vehicle to coast in neutral with the engine turned off.
Never depress the clutch pedal to allow the vehicle to coast in neutral.
When the vehicle needs to be towed, the half shaft can be pulled out or the transmission shaft can be disengaged, or the driving wheel can be towed off the ground, as shown in the figure
9. When the vehicle speed exceeds 25km/h, it is strictly prohibited to shift the transmission from the high gear area to the low gear area.
Matters needing attention
1. When shifting gears, the clutch must be fully disengaged, and the gear lever should be properly positioned in gear.
2. When the vehicle is in reverse gear, the vehicle should be stopped first and then the gear should be engaged to avoid damaging the internal parts of the transmission. When engaging reverse gear, a larger shift force is required to overcome the resistance of the reverse gear lock, and the shift force is also larger than that of the forward gear.
3. Shifting Operation Instructions: When shifting from 4th gear to 5th gear on the transmission, first press the clutch pedal, shift from 4th gear to neutral in the main gearbox, then move the lever switch valve to the H position, and consciously wait for a moment. The transmission’s auxiliary box will switch from the low gear range to the high gear range, and then press the clutch pedal to shift into 5th gear.
Conversely, when shifting from 5th gear to 4th gear on the transmission, first press the clutch pedal, then shift from 5th gear to neutral in the main gearbox. After that, move the lever switch valve to the L position and consciously wait for a moment. The transmission’s auxiliary box will switch from the high gear range to the low gear range, and then press the clutch pedal to shift into 4th gear.
When the transmission switches between 4th and 5th gears, do not skip gears, otherwise it will affect the service life of the auxiliary gearbox synchronizer.
It is forbidden to move or preselect the high-low gear shift lever valve when the main gearbox is engaged, as doing so may cause the auxiliary gearbox to disengage. In the event of an incorrect operation, first return the high-low gear shift lever valve to its original position, shift the main gearbox to neutral, wait consciously for a moment, and then re-shift the gears.
4. When the vehicle is going downhill, it is forbidden to change the high and low gear zones of the auxiliary gearbox.
5. Depending on the road conditions, start in 1st or 2nd gear.
6. Before starting the vehicle, you must wait until the air pressure rises to the starting pressure before releasing the parking brake and then shifting gears to start.
7. During use, if you find abnormal noises in the transmission, heavy operation, or other abnormal phenomena, you should immediately stop the vehicle for inspection and continue driving after the fault is eliminated.
8. This transmission is equipped with a master-slave interlocking mechanism. When the slave gearbox has not shifted into gear, the main gearbox shifting is locked. If you cannot engage a gear during shifting, it may be due to the interlocking of the master and slave gearboxes being activated. Please first check the range gear cylinder and its air lines to ensure that the slave gearbox is properly engaged.
9. The transmission within the “three guarantees” (warranty) period must not be disassembled or assembled without authorization.
Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.
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