CV JOINT


Servicing Constant Velocity Joints


-Today the class and i removed a CV joint from the drive shaft.To remove the CV we use a tool called the sliding hammer, this tool is very useful to remove the CV joint. When the CV joint came off it had rust, cracks, scratches and hammer marks. The balls inside were very dirty as the grease was very black and needed to be cleaned, so we did. As we were using the hammer to removed the CV joint off, the drive shaft, we had overall,steal cap and glasses on for safety reasons.




The sliding hammer




CV Joint



Close up on CV Joint 



Things inside a CV Joint




CV Joint Cage 



Inside a CV Joint





-A CV joint, or constant velocity joint, is part of a drive shaft, the shaft that attaches to a car's transmission at one end and the wheel at the other. CV joints are designed to be able to bend in any direction while continuing to turn the drive wheels at a constant velocity. CV joints are primarily used in the drive shafts of front wheel drive cars.

-Due to bumps and uneven surfaces in the road, a car's wheels tend to move up and down continuously while driving down the road; as a result, drive shafts cannot be made up of a solid shaft. The CV joint's precursor, the universal joint, was used in the drive shafts of rear wheel drive cars because of its ability to bend in any direction. With the advent of front wheel drive cars, however, car manufacturers had a new problem: the joints in the drive shafts needed to account not only for the up-and-down motions of the wheels, but also for the back-and-forth motions of steering. The CV joint is used in front wheel drive cars because of its ability to maintain a constant drive force to the wheels despite the many different kinds of movements in the front end of the car. The CV joint is often used in rear wheel drive and four-wheel drive cars, as well.



-CV joints should be inspected periodically and may require replacement as a car ages. A CV joint is covered with a bulbous rubber boot that tends to deteriorate over time. When a CV boot cracks or tears open, the CV joint is left exposed to the elements, which will quickly damage the joint. If the CV axles are inspected periodically, torn boots can be replaced as needed, potentially extending the life of the joints; however, if torn boots are left unattended, the joint or the entire axle may soon need to be replaced.



CV Boot

The rubber part of the driveshaft assembly / CV Axle is known as the CV boot, which is secured with stainless steel clamps. We call it cv boot clamp. The purpose of CV boot is to protect the internal components of the CV joint by retaining the lubricant, and also acting as a dust shied.