Mercedes-Benz Actros | Repair of the compressed air system

1,5,This video shows the repair of the|compressed air system on the new Actros.|| 6,9,Operations have to be performed |on both air compressors.|| 10,15,Here, the operations are performed on |a freestanding engine for better viewing.|| 16,18,First remove the following parts:||| 19,28,resonance head, intake manifold, downpipe,|exhaust manifold, compressor line, ...|| 29,33,... the two coolant lines (feed and return),|oil line, supply line, ...|| 34,36,... detach the AdBlue timer |from the compressor.|| 37,43,If there is a problem with the horizontal|air compressor, assembly is performed in the|same way as on the vertical air compressor.| 44,47,There are two options for removing|the compressors:|| 48,50,Option 1: Both are removed.||| 51,53,In this case, make sure that|the parts do not get mixed up.|| 54,58,Option 2: First one compressor is removed |and reinstalled and then the other.|| 59,62,With the last variant, |no parts can get mixed up.|| 63,66,For this reason, the second and |safer variant is shown here.|| 67,73,Start at the cylinder head - in this case|on the vertical compressor.|| 74,80,Unscrew the cap from the TDC hole.||| 81,90,The turning device can then |be fitted to the timing case.|| 95,100,When turning, make sure that the engine|turns in the correct direction.|| 101,108,If the piston is not at the|top dead center position:|| 109,115,Turn the turning device until|the piston reaches TDC.|| 116,124,Detach the cylinder liner.||| 127,129,Then detach the seal.||| 130,138,Wipe off the grease before|installing the new seal.|| 139,146,The cylinder liner and air compressor|piston can now be replaced.|| 147,149,New tools are available for|the installation:|| 150,168,Piston ring compressor pliers and two piston|ring compressor bands in different sizes.|| 171,181,These tools were specially developed |to simplify piston installation.|| 182,187,The piston ring compressor band can |easily be held with the new piston ring |compressor pliers.| 188,208,In addition, the compressor band |can be easily adjusted to the piston.|| 211,222,Mount the cylinder head.||| 224,226,Fasten the four bolts |on the cylinder head.|| 227,236,Tighten the bolts to 20 Nm in the first stage,|and to 40 Nm in the second stage.|| 237,240,The horizontal compressor is removed|in the same way as the vertical compressor.|| 241,248,Installation is shown next.||| 249,252,The horizontal angle makes|installation more difficult.|| 253,264,The cylinder liner also |makes things difficult.|| 278,284,Adjust the new seal precisely|to the cylinder liner.|| 284,292,Otherwise, the bolts which fix the cylinder |head and cylinder liner to the timing case |will not fit through the holes.| 293,302,First tighten the four bolts on the cylinder |head to 20 Nm and then to 40 Nm |in the second stage.| 303,307,The remaining parts are installed|in reverse order.|| 308,312,Finally, remove the turning device|from the timing case.|| 313,319,The repair of the compressed air system|is thus complete.||