Applies to: MODEL 375.1 with BODY 375.850 with CODE (BB3) Preparation for installation of Telma air-cooled retarder MODEL 375.1 with BODY 375.850 with CODE (BD9) Telma retarder Focal F 3300 MODEL 375.1 with BODY 375.850 with CODE (BA2) Permanent magnet retarder MODEL 970, 972, 974, 975, 976 with BODY 972.890 with CODE (BB3) Preparation for installation of Telma air-cooled retarder MODEL 970, 972, 974, 975, 976 with BODY 972.890 with CODE (BD9) Telma retarder Focal F 3300 MODEL 970, 972, 974, 975, 976 with BODY