A jaw crusher assembly comprising a jaw crushing apparatus and a service platform, the jaw crushing apparatus comprising: first and second opposing jaws (13, 14), each opposing jaw having a crushing face, the crushing faces opposing each other in an oblique relationship when the opposing jaws are in an at least partially opened state; wherein the service platform is configured to provide at least two service configurations within the opposing jaws and being operable between a first service configuration and a second service configuration by rotation of the service platform, characterised in that the service platform further comprises a first spanning portion configured to extend between opposing jaws of the material crushing apparatus in the first service configuration; and a second spanning portion configured to extend between opposing jaws of the material crushing apparatus in the second service configuration, wherein the service platform is operable between the first service configuration and the second service configuration by rotating the service platform such that the relevant spanning portion is configured to extend between said opposing jaws of the jaw crushing apparatus; and wherein, in the first service configuration, the length of the first spanning portion, and an interior angle formed between the first spanning portion and the second spanning portion, is such that the first spanning portion spans between the opposing jaws at a first desired location, and wherein, in the second service configuration, the length of the second spanning portion, and an interior angle formed between the first spanning portion and the second spanning portion, is such that the second spanning portion spans between the opposing jaws at a second desired location. first and second opposing jaws (13, 14), each opposing jaw having a crushing face, the crushing faces opposing each other in an oblique relationship when the opposing jaws are in an at least partially opened state; wherein the service platform is configured to provide at least two service configurations within the opposing jaws and being operable between a first service configuration and a second service configuration by rotation of the service platform, characterised in that the service platform further comprises a first spanning portion configured to extend between opposing jaws of the material crushing apparatus in the first service configuration; and a second spanning portion configured to extend between opposing jaws of the material crushing apparatus in the second service configuration, wherein the service platform is operable between the first service configuration and the second service configuration by rotating the service platform such that the relevant spanning portion is configured to extend between said opposing jaws of the jaw crushing apparatus; and wherein, in the first service configuration, the length of the first spanning portion, and an interior angle formed between the first spanning portion and the second spanning portion, is such that the first spanning portion spans between the opposing jaws at a first desired location, and wherein, in the second service configuration, the length of the second spanning portion, and an interior angle formed between the first spanning portion and the second spanning portion, is such that the second spanning portion spans between the opposing jaws at a second desired location.