ELBOW AS-EXHAUST 2808389 - Caterpillar

Engine: 3606 (S/N: 8RB) G3606 (S/N: 3XF) 3608 (S/N: 6MC; 8LL; 7WR) G3608 (S/N: 4WF) 3612 (S/N: 9RC; 2NZ) G3612 (S/N: 1YG) 3616 (S/N: 1PD; 1FN) G3616 (S/N: 4CG) 3618 (S/N: 2MW)Introduction
This Special Instruction provides the procedures for the proper disassembly and assembly of the 147-8470 Turbocharger . The entire instruction should be read and understood before beginning any work on the engine.Note: The turbocharger that is in the pictures that follow has already been removed from the engine for photographic purposes.Disassembly
Preparation For Disassembly
Before the start of the disassembly, mark the position of all the casing flanges and connections in order to be certain that all the components are returned to the correct positions.
Disconnect the oil system if the oil is supplied externally.
Disconnect the air pipes and the exhaust bellows.
Disconnect the instrumentation and protect all this instrumentation.
Seal all points until reassembly.
Disconnect the turbocharger wash group, if equipped.
Disconnect the speed sensor connection.Disassembly Procedure
Removal Of The Turbocharger From The Engine
Disconnect the connections to the turbine inlet.
Disconnect the turbine water wash injectors, if equipped.
Fit a suitable lifting device to the turbocharger's lifting points at the bearing housing and the gas outlet housing.
Take the weight of the turbocharger.
Remove the two bolts from the turbine end's mounting foot. Use the 178-0193 Torque Adapter .
Remove the four main mount bolts.Note: Ensure that the turbocharger remains level during the removal. Use the 178-0196 Torque Adapter .
Remove the turbocharger from the engine.
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Mount the turbocharger on a suitable service platform.Note: Ensure that the turbocharger is mounted securely before more work is performed. Damage may occur if the turbocharger is not mounted properly.Removal And Disassembly Of The Turbine Inlet Housing And Nozzle
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Remove the cotter pins from the six latches that hold the insulation in place.
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Remove the insulation.
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Remove the twelve nuts, and remove the spacers that secure the turbine inlet housing.
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Fit a suitable lifting strap to the turbine inlet housing.
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Remove the turbine inlet housing and the seal. The weight of the turbine inlet housing is approximately 35 kg (77 lb).
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Remove the six capscrews and the lock washers from the nozzle's clamping ring.
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Remove the nozzle's clamping ring.
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Remove the nozzle.Note: The serial number, the part number, and the total area of the blades are marked on the nozzle. See Illustration 10.Disassembly Of The Turbocharger Cartridge
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Attach a lifting sling to the turbocharger.
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Attach the 177-9781 Lifting Bracket to the compressor insert.
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Attach a suitable lifting device to the lifting tool.
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Remove two bolts from opposite sides of the compressor insert.
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Install the 177-9852 Guide Rod in the compressor insert. Remove the remaining six bolts.
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Remove the gland nut for the speed sensor and the rubber grommet.
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If necessary, use the three jacking screws in order to loosen the compressor insert.
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Remove the compressor insert and the peelable gasket. Ensure that the gasket is not damaged.Note: Ensure that the cable for the speed sensor passes through the compressor outlet casing as the insert is withdrawn. Damage to the cable could