TM 9-2330-379-14&PSERVICE BRAKE ASSEMBLY - CONTINUEDACTIONLOCATIONITEMREMARKSREASSEMBLY- CONTINUEDNOTEBefore reinstalling the brake air chamber assemblypower unit, reposition the wedge assembly so therollers and roller cage are engaged in the plungerslots. This is accomplished automatically by simplyaligning the two tabs on the wedge spring retainerwith corresponding grooves in the wedge bore of theplunger housing.21BrakeBrake air chamberPosition brake air assembly (13), colletassemblyassembly (13),nut (14), and wedge assembly (15) incollet nut (14)proper order for insertion in rear ofwedge assemblyright side plunger housing (7) (plunger(15) and plungerhousing containing adjustable plunger).housing (7)NOTEThe air chamber power unit should be threaded intothe wedge bore of the plunger housing to a depthsuch that the wedge is ready to lift the plungers offof the abutment seats at the first movement of thediaphragm. The bottoming out power unit isdesigned to "bottom out" in the wedge bore andprovide this optimum adjustment automatically.22Brake air chambera.Install brake air chamber assemblyassembly (13),(13) and wedge assembly (15) into rearwedge assemblyof right side plunger housing (7) by(15), plungerscrewing air chamber assembly intohousing (17)position.b.After the wedge assembly has been in-stalled in the plunger housing, checkroller-plunger for correct engagement bypushing on wedge rod by hand, whilechecking for plunger and brake shoelift.c.Measure the standout of the wedge rodfrom the end of the threaded housingbore. When properly assembled, thewedge standout is 1-1/4 inch.4-117
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