| 摘要 |
An annular type disc brake assembly having parking brake apply springs which are pre-loaded is arranged for disassembly in such a manner that the load on the parking brake springs must be evenly released in small increments until there is no pre-load on the springs. This is accomplished by providing several of the securing bolts assembling the housing section containing the spring to another housing section of a different, longer length than the remaining securing bolts of this type. The longer bolts are arranged so that they can be moved translationally into position in the one housing section before assembly and have at least a portion of the bolt heads then covered by slotted safety lugs formed as a part of the one housing section. When the disc brake is to be disassembled, the shorter bolts are first removed, leaving only the longer bolts to hold the housing sections together and resist the force of the parking brake apply springs. A suitable bolt removal tool is then inserted in the head of one of the longer bolts and the bolt is threaded outwardly of the housing for only a short distance until it is prevented from further movement by its associated safety lug. The other longer bolts are so removed to a similar extent, allowing the housing section containing the springs to move away from the other housing section for a short distance. The bolts may then be removed for another short distance, limited by the safety lugs. The process is repeated until the springs no longer apply the separating force to the housing sections. The longer bolts may then be completely unthreaded, the housing section containing the springs removed, and the longer bolts then removed translationally. |
