The bearing plate of the upper strut mount carries the vehicle’s weight, leaving the lower to act only as a pivot point. Page 1 of 2 1 2 Next > Jarstang Administrator. To make the wheels turn left or right, a steering system uses a ball joint similar to the one connecting your hip to the leg. 0 0 0 #1 Jarstang, Jan 15, 2014. Ball joints can be sealed or greasable. Two technicians are discussing MacPherson struts. Tech B says a typical MacPherson strut suspension system uses only one control arm and one ball joint per side. The strut’s upper mount includes a ball joint that allows the entire strut to turn with the front wheels. Although there are various types of front suspensions, such as the upper and lower control arm type and the MacPherson strut type, they all share a common component that enables them to do what they are designed to do: the ball joint. Loaded Joint: To check a loaded ball joint, place a jack or jack stand under the lower control arm to support the weight of the vehicle. According to Design.

The lower mounting point attaches to a track control arm or lower control arm, and it is this connection that dictates both the longitudinal and lateral orientation of the wheel assembly.
In a non-MacPherson strut automobile suspension, the two ball joints per wheel are called the upper ball joint and the lower ball joint. So what does this have to do with the ride height? ball joints.On a MacPherson or Chapman strut suspensions, the steering axis pivot is the centre point of the top pivot bearing and the centre of the lower ball joint. Which technician is correct? A MacPherson strut uses a wishbone, or a substantial compression link stabilized by a secondary link, which provides a bottom mounting point for the hub carrier or axle of the wheel. Example of Macpherson Strut Suspension Macpherson Strut.

In the “classic” MacPherson strut front suspension, as defined by MacPherson’s 1949 patent application, the steering knuckle is rigidly connected to the base of a tubular shock absorber to form a more or less vertical strut with a coil spring wound around it. All you need to know about ball joints. S550 Double Ball Joint Macpherson Strut Front Suspension [Video & Pics] Discussion in 'Suspension, Brakes & Chassis' started by Jarstang, Jan 15, 2014. The unit-replacement strut has a detachable top section held by a clamp and two bolts. Administrator. The Video Course teaches you everything about modern cars. Example 1. In the majority of these designs, the coil spring is seated in the lower control arm, supporting the weight of the vehicle. Although there are various types of front suspensions, such as the upper and lower control arm type and the MacPherson strut type, they all share a common component that enables them to do what they are designed to do: the ball joint. A MacPherson strut uses a wishbone, or a substantial compression link stabilized by a secondary link, which provides a bottom mounting point for the hub carrier or axle of the wheel.