The main purpose of the gearbox is to change the amount of torque. As a matter of fact, changing gears is possible only through the operation of the gearbox. The VAZ 2107 is equipped with five-speed manual transmissions, which are characterized by increased performance and long service life. The main element of the box is the input shaft, from which the car begins to move forward.
- How to remove the input shaft from the box
Photo gallery: main stages of work - Rejecting the input shaft
- How to determine bearing wear
- How to remove the old one
Video: replacing the input shaft bearing on a VAZ classic
Primary shaft of the VAZ 2107 gearbox
In total, the design of the “seven” gearbox has three shafts:
- primary;
- secondary;
- intermediate (through which the first two shafts interact).
However, the leading role is assigned to the primary one, since it is through it that the interaction of all the gears in the machine on other shafts begins.
The input shaft of the VAZ 2107 gearbox is manufactured together with a constant mesh gear. This element has oblique splines, which allows it to cling to the shaft teeth as clearly as possible. In addition, in addition to four gears, a synchronizer is also installed on the shaft, which allows the shaft to move simultaneously with the helical gear.
The oblique arrangement of the teeth serves for the fastest and tightest clutch during operation.
There are splines on the front of the product - it is on them that the clutch disc is located. To allow the input shaft to rotate easily, it is equipped with two roller bearings:
- front - at the end of the crankshaft;
- rear - in the front wall of the gearbox housing.
The input shaft of the VAZ 2107 has strictly verified dimensions:
- total length of the cylinder - 160 mm;
- shaft length to spline disk - 87 mm;
- diameter - 25 mm.
A small oblong narrow cylinder on which gears are located
Location
Since we are talking about the VAZ 2114, the first thing we will do is determine the location of the element.
On the fourteenth, the primary bearing is located on the shaft behind the oil seal.
It is noteworthy that on some gearboxes this bearing additionally plays the role of an oil seal, taking on the load together with the release bearing.
To get to the damaged transmission component, you will have to remove the transmission. When choosing a new element, be sure to check the recommendations from the instruction manual for your VAZ 2114 regarding the overall dimensions of the component.
How to remove the input shaft from the box
The gearbox must be installed on a flat surface so that nothing prevents its disassembly. Before starting work, it is important to clean the housing from dirt and liquid leaks so that debris does not accidentally get inside the housing.
The box looks like an elongated bell
To work you will need standard tools:
- set of wrenches;
- flat screwdriver;
- a thick bolt or a screwdriver with a powerful blade.
You need to pull the input shaft out of the gearbox strictly according to the regulations:
- Pull the oil level indicator out of the box body.
- Remove the bolt with flat washer and two nuts that hold the clutch cable bracket. Remove the cable mechanism from the gearbox.
- Unscrew the four bolts from the box cover and remove the cover.
- Unscrew the bolt with spring washer that secures one part of the input shaft.
- Before you start working with the input shaft, you will need to prevent the shafts from spinning among themselves. To do this, they need to be fixed: for example, insert a thick screwdriver between the teeth.
- Unlock the input shaft securing nut. It is very firmly planted and can take a long time to remove.
- After this, carefully pull the shaft out of the gearbox housing.
Photo gallery: main stages of work
Even after unscrewing the bolts, the cover will fit tightly to the body, so effort will be required to remove it
The most difficult stage of the work is when you have to unscrew this nut
The input shaft must be pulled out of the box very carefully so as not to damage both the shaft itself and adjacent elements
For further work, you will need to wipe all the mechanisms in order to be able to carry out troubleshooting.
Accordingly, installation of the input shaft into the gearbox is carried out in the reverse order of removal.
Rejecting the input shaft
When the car and gearbox are operating normally, the driver, as a rule, does not have any suspicions about the exhaustion of the shaft and its elements. However, if the car starts to “strange things”, for example, the gear does not work or the speed starts to switch on in an arbitrary order, then you need to make sure that the box and, in particular, the input shaft are working.
Rejection is carried out with the gearbox removed, since only in this way can you carefully examine all the shaft parts and determine their suitability for further use.
This gear can no longer be used and needs to be replaced.
The correct culling procedure is carried out according to the following scheme:
- Visual inspection of the input shaft for abrasions and deformations.
- General condition of the retaining rings and locking ring springs.
- Wear of splines.
- Scuffs and burrs on gears.
That is, a routine inspection of the mechanism allows you to determine the degree of wear of each element and, if necessary, replace them. It is important that the gears and the splined part of the input shaft do not have even the slightest damage, otherwise new parts will have to be installed.
Main shaft bearing
The “Seven” gearbox has amazing “survivability”: for example, the gearbox can “survive” one or even two engine overhauls, after which the car owner will have to repair it. However, there are a lot of small parts in the design of the box, which, unfortunately, cannot boast of their service life. Most often, the driver has to slightly modernize the gearbox design by replacing the bearings.
Open type metal bearings with the following characteristics are mounted on the input shaft of the VAZ 2107 gearbox:
- manufacturer - VPZ 23 Vologda;
- article - 2107–1701033/2101–1701068;
- length - 120 mm;
- width - 95 mm;
- height - 95 mm.
Vologda bearings last a long time, as they were originally intended specifically for the VAZ design
The main function of the input shaft bearing is to act as a rolling support, that is, to allow the shaft to move easily along its axis.
When Vologda bearings reach the end of their service life, drivers sometimes purchase products from other Russian companies. As practice has shown, imported bearings are distinguished only by their higher cost, and not by their high quality, so there is no point in overpaying for them. And the domestic manufacturer fully meets all the quality and durability requirements that motorists place on them.
When choosing a manufacturer, you should keep in mind that a higher price per unit of goods does not mean impeccable quality. However, four Russian factories already have a reputation as a supplier of reliable and affordable products:
- VPK plant - the approximate price for 1 bearing is 270 rubles;
- GPZ plant - the cost of the product is 190–200 rubles;
- the SPZ plant (3 gas processing plants) produces the most expensive analogue of Vologda bearings, price from 450 rubles;
- SPZ-4 plant - the pricing policy is quite loyal, a bearing for the input shaft will cost 220 rubles.
When choosing bearings for your car, you need to focus not only on their cost, but also on the manufacturer’s brand
How to determine bearing wear
Being a composite device, any bearing can begin to fall apart over time. Therefore, its wear can be determined without disassembling the gearbox by ear and by those malfunctions in the operation of the gearbox that the driver will immediately notice.
Signs of malfunctioning bearings of the input shaft of the VAZ 2107 gearbox can be considered:
- Extraneous noises and crunching noises when the engine is running, even in neutral gear.
- Impacts in the cavity of the box while driving, even at low speed.
- Arbitrary switching on or off of gears.
- Inability to engage the clutch pedal due to the fact that the bearing on the shaft is jammed.
All problems with bearings can only be identified while traveling, with the engine and gearbox running.
Any of these signs cannot be ignored: if the bearing fails, this can lead to serious consequences for the control of the machine. In addition, bearing misalignments will quickly affect the operation of adjacent devices.
Signs of a breakdown
- In neutral, with the engine running, extraneous and incessant noise is heard;
- The gearbox taps while moving, and there are sounds in any gear;
- Periodically, programs turn off without your participation, spontaneously;
- In some cases, the clutch does not disengage - this is if the bearing is jammed;
- Simply forgetting about the problem means providing yourself with a huge headache and significant expenses in the near future.
A skewed bearing is quite capable of contributing to the destruction of the clutch disc. But even without misalignment, a worn part will quickly lead to the need to repair the entire clutch or gearbox.
Replacing the bearing of the input shaft of the VAZ 2107 gearbox
The easiest way to replace a worn element is on the removed box. On the VAZ 2107 it is possible to remove the bearing from the input shaft directly from the gearbox in the car, but this procedure is very labor-intensive and time-consuming.
A bearing is a device that cannot be repaired or restored. Therefore, in case of breakdowns and wear, it is necessary to replace the bearing with a new one.
To work, you need to prepare the usual tools for any driver:
- screwdriver with a powerful flat blade;
- hammer;
- puller if necessary.
How to remove the old one
With the gearbox already removed from the car, you need to remove the bell (casing) and retaining rings. There is no need to completely disassemble the box:
- Use a screwdriver to pry up the special groove in the input shaft bearing. (it looks like a ring).
- Pull the shaft towards you, using the bearing as a support for pressure.
- Carefully pull out the bearing, periodically hitting it with a hammer.
- After each hammer blow, it is recommended to rotate the shaft a little to avoid dents or distortion of the bearing.
- As a result, after these actions, the bearing can be easily removed from its support.
Removal should be carried out very carefully, as the shaft may be damaged.
The work can take from 5 to 30 minutes, depending on the effort and skill of the driver. In some cases, it is necessary to use pullers, since the bearing is very rigidly seated on the shaft.
How to install a new one
Next, you will need to install a functional one in place of the old bearing. For this:
- Press the new bearing onto the shaft using a hammer.
- Use a hammer only on the inner ring of the bearing, otherwise it may become deformed.
- When pressing, it is necessary to pull the input shaft slightly forward so that the bearing fits in more easily.
Device
Needle bearings are mainly used to support the shaft. The use of thin and long rollers allows the thickness of the ring to be minimized while maintaining high load resistance.
Fastening the part has its own characteristics. During operation, the element wears out its installation location. Due to increasing play and vibrations, the part is gradually destroyed, and then it is necessary to replace it.
