How to replace the gearbox input shaft bearing on a VAZ 2107

Signs of a malfunction of the input shaft bearing of the VAZ 2107 gearbox

There are several signs that indicate a bearing is faulty:

• When the engine is running at neutral speed, extraneous noise is heard, which changes with increasing speed.
• The gearbox periodically taps while the car is moving. And the knock is present in any gear.
• Gears switch on or off spontaneously.
• The clutch does not engage due to a stuck bearing.

The problem cannot be ignored: misalignment of a faulty bearing will lead to breakage of the clutch basket. And even if misalignment does not occur, a worn part will cause rapid failure of the gearbox and/or clutch.

Bearing replacement can only be done on a removed gearbox. This is where the work begins.

Where is the crankshaft bearing installed and what is it used for?

The bearing installed in the crankshaft flange is not part of the engine, but of the transmission. The main purpose of this assembly is to center and support the transmission input shaft - it serves as a front rotating support. Anyone who has ever installed a gearbox on a car is familiar with the crankshaft bearing - it is so difficult to get into its inner race with the shank of the input shaft. As for the high service life of the part, it can be explained simply. The fact is that the rolling unit only works when the clutch is depressed. The rest of the time, the crankshaft and gearbox input shaft rotate at the same frequency. Despite the low load, it is recommended to replenish the lubricant supply in the bearing when replacing the crankshaft rear oil seal, repairing the clutch, etc. This way you will delay the need for repairs for a long time.

Removing the VAZ 2107 gearbox

To remove the gearbox you will need a pit or a lift. The procedure is as follows:

• Disconnect (better remove) the battery.
• Engage neutral gear, disengage the handbrake, raise and hang the rear axle.
• Unscrew the bolts securing the cardan and the gearbox flange, and disconnect the cardan.
• Remove the exhaust manifold pipe by unscrewing the bolts.
• Disconnect the oxygen sensor.
• Remove the starter.
• Inside the car, remove the console and gearshift knob.
• Remove the gearbox protection.
• Unscrew the clamp connecting the catalyst to the exhaust pipe.
• Remove the clutch slave cylinder.
• Unscrew the speedometer cable, remove the boot and the reverse speed sensor wire.
• Remove the driveshaft.
• Unscrew the traverse while holding the gearbox.
• Unscrew and pull out the gearbox.

Replacing the bearing of the input shaft of the VAZ 2107 gearbox

Remove the bell and retaining rings from the dismantled box. No further disassembly is required. The procedure is as follows:

• Using a powerful screwdriver, pick up the bearing of the input shaft of the VAZ 2107 gearbox by the annular groove . Serious efforts will be required, so you need to choose a screwdriver that is as strong as possible so that it does not break or bend.
• Push the transmission input shaft forward using the shaft bearing as a support.
• Slowly pull the bearing off the input shaft by tapping it with a hammer. Between hammer blows, the shaft must be rotated slightly to avoid bearing misalignment.

Knocking out a bearing takes from 5 minutes to half an hour. It all depends on the skill of the mechanic and on how closely the bearing is “affined” with the shaft.

The new bearing is pressed onto the shaft using a light hammer. The blows must be applied to the inner ring of the bearing. This should be done carefully and evenly, pulling the input shaft forward.

The advantage of this method is that there is no need to sort through the insides of the box, risking unbalancing it. Also, replacing a bearing without disassembling the entire gearbox significantly saves time.

After replacing the bearing, all that remains is to install the gearbox in place. Given its weight, it is advisable to carry out the work together. The operations are carried out in the reverse order of removing the box and do not cause any difficulties.

This bearing (PPV) is an important component of the box. If it malfunctions, the speed switch may become jammed (optionally, the release bearing fails completely).

Procedure for bearing replacement

To get to the faulty unit, you will have to remove the gearbox, clutch and flywheel. Carry out similar work on a lift, pit or overpass, using a special crankshaft bearing puller (a device for pressing out of blind holes).

Crankshaft bearing puller

The replacement procedure is as follows:

1.First, disassemble the crankshaft bearing removal tool into its component parts, otherwise you will damage the thread when installing it. After this, lubricate the conical protrusion on the puller bushing with engine oil or grease - this will protect its surface from damage.

2.Install the press-out spacer sleeve into the inner race of the bearing and drive the device in until it stops.

3.To remove the bearing from the crankshaft, do the following. First tighten the puller screw by hand. Then, holding the press-out sleeve from turning with a 14-point open-end wrench, tighten the screw with a 17-point socket. Resting against the blank wall of the hole in the crankshaft flange, the shank of the device moves out of the coupling, pushing it along with the bearing out of the socket.

4. Having removed the damaged part, wipe the seat in the crankshaft from dust and lubricate it with engine oil. Don’t forget to check and, if necessary, replenish the amount of lubricant in the new bearing - manufacturers often sin with excessive efficiency.

5. When installing the new VAZ 2107 crankshaft bearing in place, make sure that it does not warp. The final pressing is carried out with a hammer and a suitable mandrel. If one is not found, then use the dismantled unit or hammer the bearing with a hard rubber mallet.

6.Installation is complete when the top plane of the bearing is flush with the flange.

If you are unable to find a press-out, do not despair. Every experienced auto mechanic knows how to remove a bearing from a crankshaft without a tool. In this case, you will need: a drift with a diameter of 15 mm (you can use a suitable bolt) and plastic material - lithol, plasticine or bread crumb mixed with sawdust. It is placed through the opening in the inner race in such a way as to fill the space under the bearing. Then a drift is inserted into the hole and hit with a hammer. Expanding to the sides, the soft mixture squeezes the bearing out. This way you can replace the faulty unit and avoid troubles in the future.

Something else useful for you:

Video: An easy way to replace a crankshaft bearing

Signs indicating a bearing failure.

In manual transmissions, bearing units act as support bearings. When they fail, the rotation of the shafts becomes difficult, multidirectional beats, extraneous noise and noticeable play occur.

External manifestations of a malfunction include:

• Strong bearing noise that increases when the clutch is disengaged;
• Difficulty switching gears;
• The gearbox spontaneously switches from one gear to another;
• When you press the clutch pedal, you can hear extraneous knocking noises.

Possible causes of PPV failure may be:

• Malfunctions of mating units. Such as clutch, axles, release bearing;
• Lack of lubrication or severe contamination of the internal cavity of the bearing;
• Aggressive driving style;
• Installation of a product of inadequate quality;
• Expiration of service life.

In order to clarify the occurrence of a malfunction associated specifically with the breakdown of the PPV, you can verify this by checking how easily it rotates and conducting a visual inspection (integrity of the races, separator, condition of the raceways).

If the product is externally in good condition, measure its clearances in different directions (axial, axial) to determine the actual play.

Removing the faulty PPV bearing

The work must be performed by driving the car onto a lift or onto a viewing hole. If it is impossible to fulfill this requirement, you should use strong supports (stops) and a jack. However, this is quite dangerous.

Before starting work, stops are installed, neutral gear is set, and the car is put on the handbrake.

The “-” terminal from the battery is disconnected.

After this, you can proceed directly to dismantling, according to the following work algorithm.

1. Remove the cardan shaft from the coupling;
2. The intake pipe of the manifold (another name, exhaust), which is held on a three-bolt connection, is dismantled.
3. Unscrew the working cylinder from the gearbox.
4. Disconnect the wires connecting the rear dimensions, then the ground cable.
5. The speedometer cable is dismantled, after which the lower housing is removed from the clutch.
6. The rocker lever used to change gears is dismantled. Why do you need to remove a special plastic sleeve with a screwdriver?
7. The bolts securing the box are unscrewed.
8. The back of the box rests on a traverse. To complete dismantling, you need to unscrew a couple of nuts from the studs.

Do not forget to first lay a block between the engine and its protection. Otherwise, after removing the box, it may sag.

1. We remove the starter and remove the box.
2. Please note that on a VAZ classic, you can dismantle the bearing that we are going to change (PPV) without disassembling the box. However, you still have to remove the clutch bell.
3. Having approached the bearing Open: 6-50706AU Closed: 6-180502K1US9, remove the retaining ring (with round pliers).
4. The bearing assembly is removed.
5. The small fixing (circlip) ring located in the groove of the cage, which secures the bearing to the shaft, is removed.
6. The product to be removed is pressed from the neck.

Installation of a new PPV

The mounting surface is wiped and lubricated (input shaft). A spring ring is then installed into the bearing.

We install the end part of the shaft into the bearing bore (make sure there are no distortions) and press it in (evenly tapping it with a hammer).

Put on the small retaining ring and insert the assembled assembly into the gearbox (with hammer blows through a wooden spacer).

Before installation, you must ensure that the shaft is oriented correctly in relation to the secondary assembly inside the box.

Reinstall the clutch bell. Install everything else in reverse order.

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Sooner or later, the time comes when it is urgently necessary to replace the input shaft bearing of the VAZ 2107 gearbox. How soon this need will occur to you depends on many factors. And some of them are determined by your personal qualities. The only exception is the original quality of the bearing, but even when purchasing it you can be meticulous and picky enough to provide your car with a normal spare part. Other reasons for the rapid failure of the input shaft bearing include, first of all, driving style. If you consider yourself a Schumacher, you tear the lever where it is necessary and where it is not, rest assured that the bearing will not last long. The second factor is the conditions in which the machine is operated. A garage and the absence of constant overloads will greatly prolong the normal functioning of all components of the car. And the third, very common reason for early bearing failure is neglect of regular and highly recommended maintenance. Replacing the bearing of the input shaft of a VAZ 2107 gearbox, as many believe, forces you to completely disassemble the gearbox. And so people are doomedly drawn to the service station, counting out money that is not at all extra. However, craftsmen from among the people have proven that rebuilding the gearbox is not absolutely necessary. Yes, you will have to remove it - but any VAZ owner can easily cope with this. But you don’t have to go deep inside.

Useful tips

If there is no oil on the bearing, but there is no damage to its surface, then you don’t have to replace it, but simply lubricate it and install it back. This is done if for some reason the required spare part is not on hand. Lubricate the gearbox input shaft bearing (including VAZ) in two ways. The first option involves boiling the part in lithol. It is best to carry out this operation in a water bath. But there is a safer option - lubrication using the injection method. To do this, lithol is drawn into a syringe and lubricant is filled into the bearing. But you need to take into account that such a process requires more time.

Content

• 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.

The manual describes the process in such a way that even the most big-headed comrade, well acquainted with the insides of VAZs, is unlikely to understand what is meant. We present our vision of the issue.

• The gearbox itself is pulled out, the 6 bolts that secure the clutch basket to the flywheel are removed - and you can begin the planned actions.

When the box is dismantled, the bell and retaining rings are removed. You won't have to disassemble anything else.

• A hammer strikes the end of the primary. In this case, the shaft must be rotated between blows. Depending on how closely the bearing has bonded with the input shaft, it will come off in 5-30 minutes.

The new bearing is pressed in by gently hitting its inner ring with a small and light hammer. During the process, the shaft must be pulled forward. In this case, there is no need to tinker with the insides of the gearbox, risking upsetting their balance. And replacing the input shaft bearing of a VAZ 2107 gearbox using the described algorithm takes much less time than using the traditional one. You will save at least 3 thousand rubles. (and most auto repair shops ask for more). Sources used:

• https://semerkavaz.ru/transmissiya/zamena-podshipnika-pervichnogo-vala-vaz-2107/
• https://podshipnikru.com/obzori/remont-podshipnikov/menjaem-podshipnik-pervichnogo-vala-mkpp-na-avtomobile-vaz-2107
• https://autoflit.ru/1417-zamena-podshipnika-pervichnogo-vala-kpp-vaz-2107-kak-imenno-eto-sdelat.html

Replacement procedure

Replacing the bearing of the input shaft of the VAZ 2107 gearbox is necessary if this element has severe wear. The reason why bearings lose their working condition is an aggressive driving style.

You can replace this consumable with your own hands, without resorting to rebuilding the gearbox. However, this requires some experience, since the gearbox must be removed from its original location.

Removing the old bearing

To remove this component, it is necessary to remove the bell from the gearbox, with which the box is attached to the block. Retaining rings are subject to removal. A set of tools is required: screwdriver, hammer. Using a screwdriver, you need to pick up the ring groove, applying some effort. As a result, the gearbox input shaft moves forward, after which the bearing should be tightened. To do this you will need a hammer. This procedure requires caution. When tapping with a hammer, the shaft should be rotated slightly. The duration of this procedure is influenced by the skill of the person.

Installation of a new spare part

Installing a new spare part also requires attention and professionalism. To install it in its original place, use a hammer. In this case, all blows must be applied to the inner ring of the consumable. At the same time, you need to pull the input shaft forward. As soon as the mechanism is in place, the removed box is installed on the vehicle.

Thus, the fact that the driver neglects the established rules for operating a Lada car has a negative impact on the input shaft bearing. In particular, a quick start occurs and heavy loads occur during towing.