Mercedes-Benz Parts Catalog Mercedes-Benz Accessories Catalog Mercedes-Benz Technical Articles Mercedes-Benz Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
Bookmark and Share

Pelican Technical Article:

Steering Knuckle Replacement

Steve Vernon

Time:

4 hours4 hrs

Tab:

$325

Talent:

****

Tools:

5mm Allen, 19mm (2) sockets, 17mm wrench

Applicable Models:

Mercedes-Benz W124 (1986-95)

Parts Required:

New steering knuckle

Hot Tip:

Pre-soak rusted bolts in penetrant oil

Performance Gain:

Better steering

Complementary Modification:

Flush and bleed brake system

Steering knuckles on the W124 connect the tie rods, shocks and control arms to the wheels and brakes. The spindles on the knuckles also carry the wheel hub bearings. If the spindles get damaged you can have all kinds of trouble, and the only solution is replacing the knuckles.

You will need to safely lift and support the vehicle as well as remove the wheels, calipers, rotors and wheel hub before replacing the knuckle. Please see all our articles on these projects for additional assistance.

Note: Mercedes considers all of the hardware to be single use only and must be replaced with new.

If you have removed everything described above you will be looking at the dust shield.
Figure 1

If you have removed everything described above you will be looking at the dust shield. Use a 5mm Allen and remove the three bolts holding the shield to the knuckle (red arrows).

With the dust shield removed you can see the steering knuckle; it is still attached to the tie rod (red arrow), the strut (green arrow) and the ball joint on the control arm (yellow arrow).
Figure 2

With the dust shield removed you can see the steering knuckle; it is still attached to the tie rod (red arrow), the strut (green arrow) and the ball joint on the control arm (yellow arrow).

Next you need to separate the tie rod from the steering knuckle.
Figure 3

Next you need to separate the tie rod from the steering knuckle. Use a 17mm wrench (red arrow) to turn the nut while holding the shaft in place with a 5mm Allen (yellow arrow). You may need to use a ball joint tool to separate and remove the joint; do NOT use a hammer to knock the top of the shaft from the joint. Please see our article on tie rod replacement for additional assistance.

If you have not already compressed the spring you need to perform this work before loosening the nuts on the strut.
Figure 4

If you have not already compressed the spring you need to perform this work before loosening the nuts on the strut. Please see our article on strut and spring replacement for additional assistance. Tension for the spring is held in place between the lower control ball joint, strut and steering knuckle. Do NOT attempt to remove the steering knuckle before compressing the spring!

With the spring compressed remove the nut on the front of the knuckle to strut with a 19mm socket (red arrow).
Figure 5

With the spring compressed remove the nut on the front of the knuckle to strut with a 19mm socket (red arrow).

Remove the nut on the rear of the knuckle to strut with a 19mm socket (red arrow).
Figure 6

Remove the nut on the rear of the knuckle to strut with a 19mm socket (red arrow).

Use two 19mm sockets and remove the nut and bolt that holds the top of the knuckle to the strut (red arrows).
Figure 7

Use two 19mm sockets and remove the nut and bolt that holds the top of the knuckle to the strut (red arrows). The knuckle will now pivot forward.

Use two 19mm sockets and remove the pass through bolt and nut from the ball joint on the lower control arm to steering knuckle (red arrows).
Figure 8

Use two 19mm sockets and remove the pass through bolt and nut from the ball joint on the lower control arm to steering knuckle (red arrows).

When installing the steering knuckle into the control arm ball joint make sure the cut in the shaft of the ball joint lines up with the knuckle or you cannot get the pass through bolt to insert.
Figure 9

When installing the steering knuckle into the control arm ball joint make sure the cut in the shaft of the ball joint lines up with the knuckle or you cannot get the pass through bolt to insert. Swing the knuckle up and attach the two lower 19mm bolts to the upper strut bolt. After all three bolts are installed torque the lower bolts first then the upper bolt. The rest of the installation is the reverse of removal.



Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Wed 12/7/2016 02:40:12 AM