For standardization reasons, reducing the number of spare parts and simplifying the handling of spare parts, Haldex changed the sliding pin and bolt design on its ModulX disc brake.
The modification to the sliding pin is internal and is basically a change in machining concentration to where the bolt head flange meets the sliding pin edge (as shown in Figures 1 and 2). There is no effect on other components. The modified sliding pin is asymmetric, but it is not possible to fit the pin and bolt incorrectly since the bolt can only be entered into the pin from one direction.
To meet the changed sliding pin mechanism, the attachment bolt is modified in design. The most noticeable change is a greater flange on the new bolt head.
The old bolt head (Figure 1) is tightened to 162 ft.-lbs. and the new bolt (Figure 2) is tightened to 206 ft.-lbs.
The new sliding pin cannot be used with the old bolt and vice versa.