How do you disassemble the gearbox? Gearbox disassembly and assembly steps Introduction to the disas

Next, we will introduce the disassembly and assembly method of automobile transmission

1. Remove the universal joint screw first, so that the universal joint of the transmission and the transmission shaft are separated; Then remove the clutch cover screws to separate the transmission and clutch; In the case of a remotely operated transmission, the control mechanism is separated from the transmission body, and finally the transmission is removed from the car.

2. Clean the sludge and dirt on the outside of the transmission, and pay attention to protect the front and rear shaft heads.

3. Unscrew the oil drain plug, clean the lubricating oil in the transmission, and then the arpeggio oil plug.

4. Find a clean and dust-free place, use disassembly tools and copper rods, and start disassembling the transmission. The disassembly sequence is generally: transmission cover, first shaft, second shaft, intermediate shaft, reverse shaft.

5. When disassembling parts, first look at the original direction and position of the parts before disassembly, and if necessary, make a record; The dismantled parts are arranged neatly in the order of disassembly, and the parts can be strung together in order with wire or wire if necessary; The gears can be sleeved on the shaft in the original direction and position to prevent misinstallation or missing installation.

6. All parts of the disassembly should be cleaned and inspected accordingly, and those that cannot be used should be replaced; The disassembled oil seals and gaskets should generally not be used and should be replaced.

7. Before assembly, the bearings, oil seals, keyways on the shaft, the inner holes of the gears and the bearing holes of the transmission box are coated with gear oil or engine oil, and the paper pads to be replaced are soaked in oil.

8. The assembly sequence is opposite to the disassembly order, that is, the parts that are removed are installed first, so that all parts are installed in the original position, and the matching parts should be rotated often during the installation process, and the direction of the oil seal should not be damaged.

9. Before installing the transmission cover, check whether there are any missing parts in the site, whether the shafts and fixed gears have axial channeling, whether the paper pads are intact, and whether the pairs of meshing gears are meshed within all tooth widths; Toggle the sliding gear by hand to see if it can move axially to a full-tooth wide mesh; Turn the first axis by hand and try each gear separately, all of which should be able to rotate flexibly and smoothly without jamming.

10. Load and fix the fork into the corresponding fork shaft, and then load the fork shaft into the corresponding hole of the transmission cover. When installing the fork shaft, pay attention to the self-locking mechanism and the interlocking mechanism into the corresponding hole, one side of the fork shaft with three slots should deal with the direction of the steel ball of the positive self-locking mechanism, and one side with a groove on the fork shaft is aligned with the interlocking mechanism. After each fork shaft is installed in place, it is placed in the neutral position, the sliding gear in the transmission mechanism is also placed in the neutral position, the transmission cover is installed on the transmission box, at this time, each fork is just installed in the groove of the corresponding gear, the connecting bolt is installed, and the bolt is tightened according to the prescribed order and the specified torque, the gear lever is hung into different gears, and the gear can be checked in turn to check whether the gear can be hung smoothly, if it cannot be hung up, the first shaft can be gently rotated back and forth by hand, if it is still not hung up, the box cover should be removed for inspection.

1. Preparation before disassembly.

Check the gearbox model, learn about the model of gearbox accessories from the parts supplier, and should not be disassembled and disassembled immediately if the minimum wearing parts and replacement parts cannot be guaranteed. This is especially important for rare models. Generally, do not take the practice of disassembling first, finding the damaged parts and then looking for accessories.

Doing so often leads to an embarrassing situation where the parts are difficult to disassemble and cannot be recovered due to damage to the seals, gaskets, etc.

Drain the transmission oil, remove the USB disk, and carefully check the impurities of the residual oil. Generally speaking, powders containing dark brown or black are worn clutch plates, and bright white metal powders are oil pumps, single clutches, and gear mechanism wear. This further verifies the accuracy of the original judgment.

2. Remove the gearbox from the car.

Due to the shape and position of the underbody, removing the gearbox directly from the rear of the engine often does not have enough space. The most reliable method is to lift the car from the car along with the engine, but this method requires a lot of auxiliary work and is suitable for when the engine itself needs to be dismantled and repaired.

When the engine is overhauled separately, the rear support of the engine can be loosened to cause the rear of the engine to fall down to free up space in the upper part of the gearbox, which is conducive to disassembly.

When pulling the gearbox away from the engine, it should be pulled along the axial direction, which can be accompanied by rotation in the forward and reverse directions around the axis, but it should not swing up and down, left and right, so as not to damage the surface condition and fit of the connection part between the input shaft of the gearbox and the hydraulic coupling or torque converter.

3. Dismantling and assembly of the gearbox.

Prepare tools and boxes for all kinds of parts, and disassemble them on a clean and flat worktop. If you do not have a maintenance manual for the car, you should have a notebook and a marked strip of tape ready.

Disassembly should start from the front oil pump, from front to back, from the outside and inside, and keep a record at any time.

Most of the automatic transmission housings are made of aluminum alloy, and when disassembling, it is strictly forbidden to use crowbars and iron tools to beat directly.

When disassembling the hydraulic valve body, you should be careful and careful, and when the upper and lower valve bodies are separated, you should prevent the balls, snap rings, etc. from falling to the ground, and remember the correct position accurately.

When disassembling and inspecting the one-way clutch, it is necessary to pay attention to its correct assembly direction, and it must not be reversed when it is assembled.

After the parts are disassembled, they should be washed with gasoline and dried with low-pressure compressed air.

In principle, the wearing parts such as the O-ring should be replaced with new parts after disassembly, and the wearing parts that are deformed, deformed and worn should not be reused.

The new clutch pads and brake pads should be soaked in the transmission oil and can only be installed after absorbing enough oil.

When the valve core, piston, seal, etc. are assembled, they should be coated with transmission oil.

When assembling, tighten the screws in strict accordance with the specified torque.

Hello In the maintenance of the car, the dismantling of the transmission device of the car is a more complex repair, the general maintenance time is relatively long, now the steps of dismantling the manual transmission of the car used in reality are provided, in general, the dismantling steps of the transmission of different cars are basically the same, if the position is different, the steps can be modified or the safer method is adopted.

A set of tools, disassemble the control mechanism, disassemble the gearbox guest, and finally take out the transmission mechanism.

The following shares the steps of disassembling the gearbox and the disassembly process of the gearbox for the reference of those who have never disassembled the gearbox.

Disassembly of the gearbox.

1) Remove the connecting screw between the drive shaft and the transmission and put down the drive shaft. Open the oil drain screw of the transmission, put the gear oil in the transmission into the container, and tighten the oil drain screw when it is exhausted.

2) Remove the reversing light wire.

3) Remove the transmission cover from the cab.

4) Unscrew the screws that fix the grounding wire and remove the grounding wire.

5) Release the clutch release fork.

6) Remove the connecting screw between the transmission and the flywheel housing.

7) Unscrew the fixing screws of the transmission support plate and lift the transmission from the car.

Gearbox disassembly.

1) Fix the transmission on the workbench.

2) Remove the transmission cover screw and remove the transmission upper cover assembly.

3) Unscrew the screws on the side cover of the transmission and remove the side cover.

4) Remove the first shaft bearing cover, the second shaft connecting flange and the bearing cover.

5) Remove the locking parts at the rear end of the intermediate shaft and the reverse shaft, pull out the intermediate gear shaft with a special tool, and take out the gear, fixed gasket, stop washer and support sleeve on the intermediate shaft from the side cover hole.

6) Pull out the first shaft of the transmission and take out the front bearing of the second shaft.

7) Take out the synchronizer lock ring, second and third gear sleeves, sliders and springs, remove the two-axis front locking ring, remove the adjustment pad, tooth hub, synchronous lock ring, second-gear gear and thrust washer, first gear and reverse sliding gear, and take out the second shaft.

8) Pry out the reverse gear shaft and take out the reverse gear.

9) Disassemble the transmission control mechanism with the following steps:

Unscrew the transmission dust cap, remove the limit pin, and remove the shift lever.

Remove the set screws of the shift fork and unify the fork shaft in 1st and reverse gears.

Unscrew the plug on the right side of the cap, remove the locking pin and spring from the screw hole, and remove the other fork shaft.

Attached: Transmission assembly process: BSQWX

Different models have different transmission layouts, and there is no unified conclusion.

The steps of disassembly and assembly are different for each car, and there is no standard process.

Repair with late to buy stupid stuffy plum, the model of the same year model of the maintenance manual.

One by one, repair or cover maintenance is carried out in strict accordance with the manual process.

Don't just look at a few words and do it, the vast majority of cars are repaired, not broken.

The disassembly and assembly steps of the automatic transmission: 1. First disassemble the front and rear housing, oil pan and valve plate of the automatic transmission, and then disassemble the oil pump assembly; 2. Disassemble the planetary gear gearbox. 3. After the parts are disassembled, they are cleaned with gasoline and installed in reverse order.

Disassembly and assembly steps of automatic transmission: first disassemble the front and rear housing, oil pan and valve plate of automatic transmission, and then disassemble the oil pump assembly; Disassemble the planetary gearbox. After the parts are disassembled, they are cleaned with gasoline and installed in reverse order.

An automatic transmission is a device that automatically shifts gears without relying on human hands. It has the advantage of smooth shifting and easy driving. It is currently the most widely used transmission in the world, and it is also a disassembly of automatic transmissions.

1.Clean the exterior of the Zhengkai transmission and remove all the parts installed on the automatic transmission housing, such as the fuel filling pipe and the neutral start switch.

2.Remove the torque converter from the front of the automatic transmission, loosen the fastening bolts, remove the torque converter housing at the front end of the automatic transmission, remove the output shaft flange and the rear housing of the automatic transmission, and remove the speed sensor sensing rotor from the output shaft;

3.Remove the oil pan, remove the connecting bolts of the oil pan, insert the blade of the special maintenance tool between the transmission and the oil pan, and cut off the applied sealant, taking care not to damage the flange of the oil pan;

4.Inspect the oil pan for particles. Remove the magnet and observe the collected metal particles. If it is a steel (magnetic) material, it means that the bearing, gear, and clutch steel plates are worn; If it is made of brass (non-magnetic) material, it means that the bushing is worn;

5.Remove all the wiring harness plugs connected to the valve plate, remove a solenoid valve, remove the throttle cable connected to the throttle valve, carefully pry up and remove the hydraulic oil pipe with a screwdriver, loosen the fixing bolt between the oil inlet filter screen and the valve plate, and remove the oil inlet filter from the valve plate;

6.Remove the connecting bolts between the valve plate and the automatic transmission housing, remove the valve plate assembly, remove the check valve, spring and accumulator piston in the oil circuit of the automatic transmission housing, remove the manual valve lever and parking lock claw, and if necessary, also remove the manual valve operating shaft.

Photo by Pacific Automobile Network Q&A).

Manual gearbox disassembly and assembly steps:

2. Remove the transmission hanger. Cross, split the bolt of the transmission housing in three parts. Remove the sealing screws.

Open the snap ring, place it on the countershaft bearing, and then remove it with a circlip plier. Finally, pull out the transmission housing and dowel pins. Remove the reverse idler shaft, reverse idler, and the rest is like a reverse fork.

Remove the backshift lock cam;

3. Wrap adhesive tape on the spline of the clutch driven disc to remove the shift fork assembly, spindle assembly and countershaft assembly from the clutch shell. Remove the differential assembly, magnets, drain plates, oil deflectors, and gaskets.