The intermetallic compound system CePd3Bx, with x=0, 0.12, 0.25 and 0.5, has been studied by X-ray photoemission, Bremsstrahlung isochromat and electron energy loss spectroscopy. As a function of the boron concentration strong variations of the occupied and unoccupied parts of the valence bands as well as of the 3d core levels are observed. An analysis of the data within the Gunnarsson-Schonhammer (GS) model (1983) yields an f occupation varying from nf approximately 1 in CePd3B0.5 to nf approximately 0.9 in CePd3 (90K), while the f conduction electron hybridisation remains about constant over the entire composition range with Delta =150+or-20 meV. Moreover a nonlinear dependence of the lattice contraction on the f occupancy is found which is well accounted for by a calculation performed within the GS model.