Today we have a car Chevrolet Niva (Chevrolet Niva), 2012 of release, on which it is necessary to replace the driveshaft CV joint, for repair. The problem with the CV joint arose due to a torn anther, the owner of the car did not notice this in time, as a result, road dust and dirt got there, and unpleasant sounds appeared during movement.
Getting to work, remove the gimbal, unscrewing 4 nuts on the bridge on each side (key 13), remove part of the protection. For the convenience of work, longitudinal jet thrusts were unscrewed. We dismantle the cardan.
Before starting the repair, a Cardan repair kit was purchased, its number in the spare parts catalog: 21214-2201160. The kit comes with a boot, grease, separator, two clamps, new nuts, engravers, plugs, a stopper and assembly instructions.
We remove the stopper of external fixation. From the repair kit, first install the clamp, then the boot, add lubricant:
We put on a stopper, while its dimensions did not match a little, I had to go to the turner. We take the separator, remove the fixing clamps from it and put it on. We fill the grease into the separator, in general, it was not enough from the repair kit, I had to add a little of my own. We put the cardan in place.
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We carry out work on a viewing ditch or overpass. During operation, you will need to rotate the drive shaft, so you should put the machine in neutral and release the parking brake lever. You can hang the machine on one rack in front or behind (depending on which shaft you need to remove). In this case, you do not have to roll the car to turn the shaft.
The procedure for removing the front and rear drive shafts is similar. We install an adjustable stop under the transfer case. With a “13” head with an extension, we unscrew the four nuts securing the side brackets of the transfer case suspension and two nuts of the cross member of the rear bracket of the transfer case.
We lower the transfer case on the stop so that it comes off the mounting studs.
Turning the shaft with an open-end wrench “by 13”, we unscrew in turn the four nuts securing the shaft to the drive axle flange.
Nuts are equipped with Teflon inserts designed to prevent spontaneous loosening. It is recommended not to allow repeated use of nuts and to replace them with new ones in a timely manner.
To remove the nuts, insert a mounting blade into the slot between the CV joint and the flange, then press the CV joint so that it moves slightly along the splines of the shaft and allows you to remove the unscrewed nuts.
Then, with two mounting blades, we press the CV joint so that the mounting studs come out of the holes in the drive axle flange.
The transfer box removed from the mounting studs allows this to be done.If you do not release the transfer case, then the free play of the spline connections of both CV joints will not be enough.
Holding the drive shaft with your free hand, unscrew the four nuts securing the shaft to the transfer case flange ...
Install the drive shaft in reverse order.
The torque is transmitted to the front wheels through the drives.
The Chevrolet Niva front wheel drive consists of two constant velocity joints (CV joints) connected by a shaft.
The connection of the shaft with the hinges is splined, from longitudinal movement the shaft is fixed in the hinge with a thrust and lock rings.
The splined shank of the outer CV joint of the Chevrolet Niva is connected to the wheel hub and secured with a bearing nut, and the inner one is connected to the side gear in the front axle gearbox.
Each joint consists of a body, separator, inner race and six balls. The latter are placed in the grooves of the body and clip.
In the outer CV joint of the Chevy Niva, these grooves are made along the radius, due to which it can transmit torque at large angles.
The grooves in the inner joint are straight, which allows the parts to move in the longitudinal direction, lengthening or shortening the drive (this is necessary to compensate for the mutual movements of the suspension and the front axle gearbox), and deviate at small angles.
Inside the cage there is a splined hole for connection with the drive shaft.
Fig.33. Chevrolet Niva front wheel drive
1 - dirt-reflecting gland ring; 2 - body of the internal hinge; 3 - large clamp; 4 - retainer; 5 - protective cover of the inner CV joint; 6 - small clamp; 7 - wheel drive shaft; 8 - protective cover of the cover of the outer CV joint; 9 - protective cover of the outer hinge; 10 - separator; 11 — a persistent ring of a clip; 12 - ball; 13 — holder of the outer hinge; 14 - retaining ring; 15 - body of the outer hinge
The details of each Chevrolet Niva CV joint are made with high precision, the balls of one sorting group are selected individually for each joint.
Therefore, it is unacceptable to replace individual parts, and before disassembling, their relative position should be noted. SHRUS-4 grease is placed in the hinge before assembly.
The tightness of the CV joint joint Chevy Niva - an indispensable condition for its reliable operation - is ensured by protective rubber covers.
The cover with its ends is put on the hinge body and the drive shaft and secured with clamps.
It is allowed to use only special clamps with a smooth inner surface and no protruding parts.
The outer CV joint cover is additionally protected by a plastic casing.
Dirt-reflecting rings are pressed onto the bodies of the inner and outer hinges.
It is not allowed to replace individual parts of the SHRUS joint, with the exception of the boot, clamps, casing, as well as the retaining, thrust and dirt-reflecting rings.
Removing the front wheel drive Chevrolet Niva
- Drain the oil from the front axle gearbox.
- Disconnect the propeller shaft from the front axle gearbox.
- We dismantle the extensions of the front suspension of the Chevrolet Niva.
- Remove the stabilizer bar.
- Remove the front suspension springs.
- We install an adjustable stop under the front axle gearbox.
- We take the steering knuckle of the Chevrolet Niva to the side and remove the shank of the outer CV joint housing of the right drive from the hub.
- Using a socket with an extension or a spanner wrench, unscrew the three nuts securing the bearing cover of the drive inner hinge housing to the front axle gearbox housing.
- Using a wrench, we unscrew the bolt securing the bearing cover of the Chevy Niva inner CV joint housing to the bracket of the front suspension cross member.
- Similarly, we unscrew the bolt securing the left drive bearing cover to the cross member bracket.
– Raise the gearbox with an adjustable stop until the lugs of the bearing caps come out of the brackets of the cross member.
- Having prying off the bearing cover of the internal CV joint housing of the Chevrolet Niva with a mounting blade, we shift the cover from the gear studs.
– The connection between the cover and the gearbox is sealed with a cardboard gasket.
– By turning the bearing cover relative to the drive, we remove the shank of the inner joint housing from the gearbox and remove the right drive assembly.
- We remove the left drive in the same way as the right drive of the Chevrolet Niva front wheel.
- Unscrew the three nuts securing the bearing cover of the inner hinge housing of the left drive to the bracket of the front suspension cross member with a spanner wrench or a head.
- We pry off the bearing cover of the inner CV joint housing of the left drive with a mounting blade and slide it off the gearbox studs.
- Turning the bearing cover relative to the drive, we remove the shank of the Chevy Niva inner CV joint housing from the gearbox and remove the left front wheel drive assembly.
- We install the drives in the reverse order, replacing the gaskets with new ones.
Removal and installation of external CV joint Chevrolet Niva
We carry out work when replacing the outer hinge, its cover and lubrication.
Operations to replace the cover and lubricate the outer CV joint Chevy Niva:
- When replacing the cover, we clean the outer CV joint of the Chevrolet Niva from the outside and clamp the shaft into a vise with soft metal sponge pads.
- With pliers we squeeze the small clamp by the protrusions and, prying with a screwdriver, we disconnect it.
- Similarly, remove the large collar of the cover.
- We move the protective plastic casing and rubber boot along the shaft.
- We clean and wipe the end part of the outer CV joint of the Chevrolet Niva from old grease.
- Through a soft metal drift, we knock down the hinge, striking at the end of the clip.
– The punch must not apply force to the cage or balls in order to avoid damaging them.
- We remove the outer CV joint of the Chevrolet Niva.
– The hinge is fixed on the shaft with a retaining ring located in the groove at the end of the shaft.
– Pry off the retaining ring with a screwdriver and remove it.
- Separate the rubber protective cover and plastic casing
- Remove the rubber protective cover and plastic casing from the shaft.
– To replace the thrust ring, remove it with pliers.
- We install the outer CV joint of the Chevy Niva in the reverse order.
- When installing the old hinge, we first clean it of grease.
- Having cleaned the shaft, apply a thin layer of new SHRUS-4 grease on it and put a casing and a new cover on the shaft.
- Install a new retaining ring on the shaft.
- We put 60 cm3 of SHRUS-4 lubricant into the hinge cavity.
- Through a soft metal drift, we press the hinge onto the shaft.
- We put a cover on the body of the outer CV joint Chevrolet Niva.
- We install new clamps (before tightening the clamps, we release excess air from the boot by prying off the seat band of the boot with a screwdriver).
Removal and disassembly of the internal CV joint Chevrolet Niva
We carry out work when replacing the inner CV joint, its cover and lubricant.
Operations to replace the cover and lubricate the internal CV joint Chevrolet Niva:
– Remove the bearing cover of the inner joint housing.
– Clamp the drive shaft in a vise with soft metal jaws.
- Having removed the clamps, we shift the cover along the shaft.
- Pry off the retainer with a screwdriver and remove it.
- We mark the mutual positions of the body, separator and clip.
- Remove the body of the internal CV joint Chevy Niva.
- We pry the balls with a screwdriver and take them out.
- Having shifted the separator, we knock down the clip with a soft metal drift.
- Remove the separator and cover of the internal CV joint Chevrolet Niva.
- We wash the body, separator, clip and balls.
– Traces of corrosion, scuffing and dents on the tracks are not allowed. If they are found, replace the hinge.
- Assemble the hinge in reverse order.
- When assembling, we install a new retaining ring and a rubber boot on the shaft.
- We put 150 cm3 of SHRUS-4 grease into the hinge.
- We install new clamps (before tightening the clamps, we release excess air from the boot by prying off the seat band of the boot with a screwdriver).
A grenade in a Chevrolet Niva car is a constant velocity joint. It is called a grenade due to its similarity in appearance to a military device. In fact, a grenade is a CV joint.The purpose of the CV joint in the car: ensuring the transmission of torque at angles of rotation relative to the axis of 70 degrees. A CV joint is also called a hinge. Cars use CV joints in the drive wheel drive system.
A little about the history of the grenade. After cars with a front-wheel drive mechanism began to be produced, the operation of this drive was carried out using conventional cardan joints. However, the work of the hinge, with this principle of operation, was loaded. During the turn of the car, the outer hinge worked in a difficult position - with angles of 30-35 degrees. At angles over 10 degrees, the car lost power. Plus, the hinges had a short service life, the tires of the drive wheels wore out, and the transmission shaft worked with a huge load. Such problems contributed to the invention of a special joint (CV joint), which transmitted rotation evenly regardless of the angle between the connected shafts.
This device is used to transmit engine torque. The transmission is carried out from the gearbox to the drive wheels, often the front ones. Due to this transmission, rotation occurs at the same speed, taking into account the fact that there is an angle between the shafts.
There are not so many reasons why the CV joint ceases to function.
Wear of the rubbing parts of the mechanism due to a long service life. This is the main reason for the breakdown of any parts. But this is good if the part needs to be repaired after 100,000 km of run, and not earlier. But there are times when a new car breaks down.
Wrong driving. But here, most likely, sloppy driving. Bad driving can be caused by:
Entry of dust, water and dirt into the device. This cause is also common and contributes to the failure of the hinge in a matter of days after the ingress of foreign substances. The hit is due to damage to the anther. Anthers tend to burst or crack during operation. It is extremely difficult to detect damage to the anther, because for this it is necessary to carry out constant monitoring, which is almost unrealistic.
The grenade consists of moving parts, which, depending on the operation, are erased or broken. Therefore, CV joints must be replaced with new ones. Only the device on which damage to the anther is noticed, and the dirt has not yet had time to get inside, is subject to repair. But such cases occur very rarely. In addition, the price of the original device for Shevik is not so high.
How to determine the malfunction of a grenade? Determining a CV joint malfunction on a car is quite simple. To do this, while driving, turn the steering wheel all the way to the right, and then to the left. At this time, with the extreme right or left position of the steering wheel, a crack or crunch is heard from under the wheels, then the hinges need to be replaced. Moreover, it is necessary to find out exactly whether it is necessary to replace one hinge or all.
To install a new grenade, you must first remove the old worn one. Consider the steps for replacing a grenade. How to remove the axle shaft from a Chevrolet Niva car can be found on the Internet and watch a video.
We clamp the axle shaft in a vise so that it is convenient to work with a grenade.
The worn boot is removed from the grenade by cutting or turning it outward with the inside.
With the help of a hammer, the CV joint is knocked out from the axle shaft. This is done by tapping the grenade with a hammer.
After the grenade is removed, the old anther is removed and all the teeth of the CV joint half shaft are cleaned. You can even rinse with gasoline and grease with Litol.
Installed a new grenade. The price of a new grenade assembly ranges from 1000 to 1200 rubles. Sold mostly with boot and grease inside.
First, the boot is threaded onto the axle shaft, and then the grenade is fixed. A click indicates the correct installation of the CV joint.
Anther is clamped with clamps. The replacement process is complete.
Torn boot, needs to be replaced
By the same principle, you can repair a grenade. To do this, it is necessary to remove the worn boot, clean and rinse the hinge from the inside with gasoline and clean it with a stream of compressed air.
Repair is carried out if a little dust or dirt has got inside the CV joint. If the internal parts of the CV joint are damaged, then the grenade cannot be repaired.
In fact, this is not a repair, but a regular boot replacement. It is only necessary to clean the hinge from the inside, lubricate it with special grease and install a new anther. The process of repairing the damaged anther on the grenade is over.
The price of the new original grenade is already known, but there are cheaper versions of CV joints on the market. These are poor quality materials that will last a short time. The price of a new boot, which is sold along with lubricant, costs about 250-500 rubles.
Video of replacing a grenade on a Chevrolet Niva car can be viewed:
VIDEO
This video shows the main stages of removing a grenade without removing the axle shaft from the car. After watching the video or reading the article, you can freely replace the grenade on the car. The replacement takes about two hours.
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