JCB 3C, 3CX, 3D, Sitemaster, 4C Turbo, 2wd and 4wd models reservdelskatalog JCB Parts Book for the White and Black Cab (1985 and back) 3C, 3CX, 3D, Sitemaster, 4C Turbo, 2wd and 4wd models Really only a collection of exploded diagrams of every assembly on the machines as it doesn't contain any parts numbers. Parts Numbers were held by the dealers and this book was used as a key by taking the page number and indicated component number from those pages to cross-reference with the master schedule.