Component Placement Volvo Bus Corporation See also, 300, Component placement, Description, Design and function The reader is advised that printed copies are uncontrolled. 26 Component Description Placement Component appearance and associated adapter Symbol explanations 1 U06 Voltage converter 1 electrical distribution unit Fig. U08 Modulator EBS, front 1 – B Fig. X09 Slide ring horn 1 – A Fig. X906 External charging outlet 1 – A Fig. Y25 Solenoid valve assembly for ECS, rear 6 – A Fig. Y35 Solenoid valve cooling fan 12 – B 6x2 Fig. 9 – B 4x2 Y40 Solenoid valve ECS, front axle 1 – B Fig. Y72 Valve, horn 1 – A/B/C Fig. Y91A Solenoid valve engine brake 12 – C 6x2 Fig.
9 – C 4x2 Y904 Valve retarder, ZF 12 – A 6x2 Fig. 9 – A 4x2 Y910 Operation valve retarder, ZF 12 – A 6x2 Fig. 9 – A 4x2