BRAKE CHAMBER ASSEMBLY

TM-5-3810-306-20 Container Crane 40-Ton Rough Terrain Model RTB75CC Manual
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TM 5-3810-306-20 BRAKE CHAMBER ASSEMBLY TOOLS: General mechanic’s tool kit: automotive (5180-00-177-7033) SUPPLIES: None EQUIPMENT CONDITIONS: Brake chamber assembly removed. (Refer to page 11-4.) DISASSEMBLY: 1. DISASSEMBLE WEDGE ASSEMBLY. WARNING Wedge assembly is under pressure. Quick release of spring pressure can cause injury. CAUTION Use a vise with soft metal covers on jaws to compress and hold spring (5). a. Compress and hold retaining spring (5) and remove snap ring (7) from wedge shaft. Carefully release spring (5). b. Remove retaining washer (6) wedge spring (5) and spring retainer (4) from cage (2). CAUTION Do not attempt to drive wedge (1) through rollers (3) and cage (2) or force rollers (3) through slightly closed slots of cage. This will permanently damage cage (2). c. Insert a thin bladed screwdriver between one flat of wedge head and the roller retainer cage (2). Spread cage (2) open just far enough to remove rollers(3). d. Remove roller retainer cage (2) by sliding it off wedge shaft (1). 2. DISASSEMBLE BRAKE CHAMBER. WARNING Ensure spring brake chamber (18) is caged before continuing. a. Remove clamp ring nuts (10) and bolts (11). Clamp ring (9) is nearest threaded tube. b. Spread clamp ring (9) and remove spring brake chamber (18) from non-pressure housing (12). NOTE Spring brake chamber (18) containing large spring can be removed to service remainder of the assembly, after spring is caged, but is not serviceable itself. c. Remove diaphragm (17), diaphragm plate (16), push rod (15), boot (14) and wedge guide (13) from non pressure housing (12). INSPECTION: 1. INSPECT WEDGE ASSEMBLY. a. Inspect wedge rollers (3) for grooves or nicks and replace if necessary. 11-8

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