Idler recoil and track adjuster with encapsulated spring-retention arrangement, and method of assembly and disassembly thereof

摘要

A spring retention arrangement includes an inner casing, within which the spring is disposed, and an outer casing within which the inner casing is disposed. A retaining member is securable to both the inner casing and outer casing to enclose the spring, and means are provided to ensure that the retaining member cannot be removed from the outer casing without first disattaching the retaining member from the inner casing, allowing the spring to extend to its free length while still enclosed.