Loose or Tight the screws of IKO LWL-12-B Block marked yellow to adjust the tension between block and linear rail.
Must cleaning your IKO LWL-12-B rail perfect because a little durst can cause to fail to install.
Put lubricating oil on the IKO LWL-12-B Block rail.
Must be keep perfect alignment to install the IKO LWL-12-B Block. In some case, no enough space to install IKO LWL-12-B Block and you need to uninstall the rail to install it.
Loose 4 screws to let the IKO LWL-12-B Block can go to the rail easily.
Put IKO LWL-12-B Block gently to the rail and sliding slowly the whole block.
Then tight the IKO LWL-12-B Block’s screws correct to keep the IKO LWL-12-B Block perfect to fit the rail.