buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

Relays and Modules - Brakes and Traction Control > < Vacuum Brake Booster|Description and Operation|Page 4779
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7.

Install primary power piston bearing in rear housing, then lubricate inner diameter of bearing.

8.

Mount front housing in holding fixture J-23456 or equivalent, then install diaphragm return spring, power piston group and the rear housing
assembly, Fig. 10.

9.

Ensure housing scribe marks are properly aligned, then press housing sections together with holding fixture forcing screw. Assembly of housing
can be facilitated by applying vacuum to front housing port. Block opening for vacuum switch, if equipped.

10.

Rotate rear housing clockwise to lock housing, then stake two tabs 180° apart to secure assembly. Do not stake tabs which have previously been
used.

11.

Lubricate grommets and front seal, install grommets, check valve and vacuum switch, as equipped, then the front housing seal.

12.

Install silencer and pedal pushrod boot.

Relays and Modules - Brakes and Traction Control > < Vacuum Brake Booster|Description and Operation|Page 4779