Overview of Bellows Conversion

^ To convert the bellows variant -A- to version -A1-, the hydraulic unit, the brake booster -4- with brake master cylinder and the intermediate piece -11- must be removed.

^ The assembly of the brake master cylinder with the brake booster -4- must not be disconnected for removal and installation if both parts should be continued to be used!

^ To remove the intermediate piece -11- the battery must be removed! This will prevent damage of the components in the surrounding area.

^ The following parts must be exchanged or replaced for first installation of variant -A1- (replacement exacute):

- Remove short bellows -2- on the brake booster and the long bellows -1- on the firewall.

- Remove the grommet (rubber groove ring) -3- for mounting the long (former) bellows (not replaced).





- The parts shown are used in place of the removed parts -1 / 2 / 3-: Bellows -B- (already mounted on new brake boosters), connection sleeve -7.1- with sealing ring -7.3-, the seal for the firewall -7.2- and the hose clamps (clamps) -6 and 6.1-.

- The two push rods -12 and 9- are to be replaced with the modified version -12.1 and 9.1-.

Difference in the push rods:

^ Push rods -12.1- with thread and fastening nut -13.1- in place of push rod -12- with retainer -13-.

^ A guide for the bellows -arrow- is present in the previous push rod -9-. A guide is not present and not permissible in the new push rod -9.1-!