Some friends who haven't contacted the DT14 series gearbox often leave a message to advisor Weijun. What kind of advantages does this gearbox have? No use of 14-speed gearbox, no operation. What should I do?
Dongfeng DT14 gearbox
Do not panic, today for everyone to detail about Dongfeng DT14 series transmission!
DT14 series gearbox is the first achievement after Dongfeng cooperated with Volvo. It follows the technology of Volvo's 14-speed manual gearbox. It adopts the form of full synchronizer shift, single H control top cover and front and rear sub-tanks for pneumatic shifting. Simple operation, clear gear.
DT14 series transmission, the current model has DT1420 \ DT1422 \ DT1425 three, both direct and overdrive speed ratio. The head speed ratio is large, which increases the driving force for starting the vehicle, and the difference between the gear positions is small and evenly distributed, ensuring the smooth engine power output.
Active lubrication technology and water cooling technology
DT14 series transmissions increase active lubrication on the basis of traditional splash lubrication. The dual lubrication method lubricates key components such as bearings, synchronizers, and gears to ensure that the vehicle will not be tilted due to tilting of the vehicle when it is in a long downhill and long uphill. Insufficient circumstances.
In addition, the lubricant filtration system, gearbox lubricant coarse filtration and fine filtration devices are also added to ensure the cleanliness of the lubricant.
In addition, the DT14 series gearboxes are equipped with a cooling device. The antifreeze fluid cools the gearbox oil to reduce the temperature of the cabinet. This prevents the transmission from working at low speeds, heavy loads, and climbing conditions for a long period of time and increases the reliability of the transmission. .
DT14 Series Transmission Operation Guide
Many card friends were previously using a 12-speed transmission or a 16-speed transmission, which required multiple shift operations. Many cardmates used DT14 series gearboxes and lamented that this is more convenient than 12-speed and 16-speed operation. It!
Following the old driver to focus on it, we must remember!
On the transmission joystick, there is a front-auxiliary half-height shift switch and a rear sub-tank high-low gear changeover switch!
Through the high and low range changeover switch in front of the shift lever, the 1st, 2nd, 3rd and 4th gears can be switched in the low range, and the 5th, 6th and 7th range can be switched in the high range.
Where are the other seven blocks? This requires a half-stop switch on the left side of the shift lever. Through the half-block switch, each forward gear position is divided into high and low two-half gears. The high and low gears are combined with a half-stop switch, which forms a combination of 14 gears: 4*2+3*2 (8 low gears + 6 high gears).
Operation summary: In the same block, the gear shifting only needs to toggle the half-speed switch and no moving lever; the high-low block switch is only used when the 4/5 block is changed!
DT14 block operation points
The half-height switch and the high-low switch must be pre-selected before the gear
Reasons: DT14 half gear and high and low gear change are achieved through front and rear sub-tank air-control shifting mode. Pre-selection realizes gear position control valve opening in advance to ensure smooth gas path.
Clutch in the end
Reason: The clutch booster controls the cylinder air pump. After the entire vehicle design clutch is stepped on, the air pump is fully opened, and the air pressure reaches a certain value to push the switch.
1 block start: standard load and reload must use 1 block start
Reasons: 1 block is the starting block for climbing, including 1 block low and 1 block high 2 gears. If it is not in 1 block, it will cause premature wear of the clutch plate, damage the clutch plate, and damage the synchronizer at the same time.
DT14 Series Transmission Operation Precautions
Do not coast and taxi
Reasons: DT14 block adopts active lubrication + splash lubrication. The standard water cooling device lubricates the inside of the gearbox and reduces the overall temperature. The active lubrication and water-cooling devices stop working in the neutral and extinguishing state, which can easily cause damage to the gearbox!
When the vehicle needs a trailer, be sure to disconnect the gearbox flange from the driveshaft
Reason: When the trailer is in operation, the engine is in the off state and the drive shaft connection will drive the internal gears of the gearbox to cause anti-dragging and damage the gears and bearings of the transmission!
When the speed is higher than 30 km/h, it is forbidden to hang directly from the high block to the low block.
Reason: If the speed is higher than 30 km/h, if it is forcibly hung from the high block to the low block, it will damage the gearbox synchronizer!
Tips 1: In winter, because the transmission oil temperature is too low, there will be high and low or half-shift delay. This phenomenon is normal. After the vehicle runs for a short distance, the oil temperature will naturally eliminate after the oil temperature rises. .
Reminder 2: It can switch between gears under no-load or light-load conditions.
Tip 3: The DT1420 is not the same as the DT1422\DT1425 first guarantee mileage and the guaranteed mileage and oil products!
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