116 F2B ENGINE T RAKKER E URO 4/5 Figure 232 Figure 235 106233 106236 Accurately clean slot ring (1) and area around turbine body from carbonaceous deposits and check that the ring moves freely, otherwise, replace turbocompressor. Dismount seal ring (1), external with respect to central body (2). Accurately clean seal ring (1) and check that the ringdoes not result to be damaged; otherwise replace the ring. NOTE Any small cracks between slots and ring can be accepted, because they do not impair turbocompressor operation conditions. Figure 236 Figure 233 Check turbine rotor (1); there must not be found:
carbonaceous deposits, deformation, cracks, blade scoring; also, turbine must turn freely. By comparator, check clearance of turbine rotor stem (1); clearance must result to be: - axial clearance: 0.025 106237 106234 By suitable scraper and abrasive paper, accurately clean surfaces ( ) of turbine body (1) from carbonaceous deposits, taking care to avoid damaging the surfaces. 0.127 mm - radial clearance: 0.254 Figure 234 0.356 mm. Where either clearance values over above ones or any one of above mentioned faults are found , replace turbocompressor.
NOTE Before cleaning turbine side central body, properly protect oil, water and air inlets and outlets ( ) in order to prevent dirt or foreign bodies from entering turbocompressor. 106235 Dismount clamp (1) fromcentral body (2) and check that the clamp does not result to be damaged; otherwise replace the clamp. Base q November 2006 Print 603.93.641