TM 9-2320-209-34-2-1 TABLE OF CONTENTS-CONT CHAPTER 12. BRAKE SYSTEM GROUP MAINTENANCE Section I. Scope . . . . . ...... . . . . . . . . . . . Equipment Items Covered . . . . . . . . . . . . . . Equipment Items Not Covered . . . . . . . . . . . Section II. Handbrake and Service Brake Assemblies. . . . . . . Handbrake and Service Brakeshoe Repair . . . . . . . . . . . . .... . . . . . . . . Preliminary Procedure . . . . . . . . . . . . . Disassembly . . . . . . . . ........ . Cleaning . . . . . ... . . . . . . . . . ... Inspection and Repair . . . . . . . . . . . . . Assembly . . . . . . . . . . . . . . ... . . . Front and Rear Service Brake Drum Repair . . . . . . . . . . . . . . . . . . . . . Preliminary Procedure . . . . . . . . . . . . Cleaning . . . . . . . . . . . . . . . . . .... Inspection and Repair . . . . . . . . . . . . . Section III. Hydraulic Brake System . . . ....... . . . . . Air Hydraulic Cylinder Assembly Repair ... . . . . . . . . . . . . . . . . . . . Preliminary Procedures . . . . . . . . . . . . Disassembly Into Subassemblies . . . .... Air Cylinder Piston Assembly Repair ... . . . . . . . . . . . . . . . Air Cylinder and Air Tube Cleaning, Inspection, and Repair . . . . . . . . . . . Slave Cylinder Body Repair. . . . . . . . . . . Pushrod Bushing Assembly Repair . . . . . . . Slave Cylinder Compensator Assembly Repair . . . . . . ... . ....... . .. Slave Cylinder Compensator piston Assembly Repair . . . . . . . . . . . . . . Slave Cylinder Control Valve Piston Assembly Repair . . . . . . . . . . . . . . . . Assembly of Air Hydraulic Cylinder Assembly . . . . ... . . . ..... . . . Front Brake Hose Removal and Replacement . . ..... . . . . . . . . . . . . Preliminary Procedures . . . . . . . . . . . . Removal . . . . . ......... . . . . . Replacement . . . . . . . . . . . . . . . . . . Section IV. Trailer Brake Connections and Controls . . . . . Air Brake Hand Control Valve Repair . ........ . . . . . . . . ........ Preliminary Procedure . . . . . . . . . . Disassembly . . . . . . . . ... . . . . Cleaning . . . . . . . . . . . . . . . ... Inspection and Repair . . . . . . . . . . . . Assembly . . . . . . . . . . . . . . . . . . . . . Paragraph 12-1 12-2 12-3 12-3a 12-3b 12-3c 12-3d 12-3e 12-4 12-4a 12-4b 12-4c 12-5 12-5a 12-5b 12-5c 12-5d 12-5e 12-5f 12-5g 12-5h 12-5i 12-5j 12-6 12-6a 12-6b 12-6c 12-7 12-7a 12-7b 12-7c 12-7d 12-7e Page 12-1 12-1 12-1 12-1 12-1 12-1 12-2 12-3 12-3 12-4 12-5 12-5 12-5 12-6 12-7 12-7 12-7 12-8 12-16 12-23 12-24 12-27 12-28 12-33 12-35 12-37 12-47 12-47 12-48 12-52 12-59 12-59 12-59 12-60 12-63 12-63 12-63 xi