We remove the turbocharger (turbocharger) when repairing the engine, replacing gaskets, and when replacing the turbocharger itself
The turbocharger may not be disassembled or repaired.
The condition of the turbocharger should be checked by the run-on time of the rotor when the diesel engine is stopped.
To do this, after 3 ... 5 minutes of operation at the minimum idle speed mode, the diesel engine is brought to the maximum speed mode, and then turn off the fuel supply.
The rotation of the turbocharger rotor after stopping the diesel engine must be monitored for at least 5 s.
A smooth, constant level sound with a gradual decay indicates the normal condition of the turbocharger,
One of the reasons for a decrease in diesel power and increased smoke can be a decrease in boost pressure due to contamination of the compressor flow path, which can be determined by the tight rotation of the rotor.
If the rotor rotates tightly, then it is necessary to partially disassemble the turbocharger and flush the compressor part.
Removing the turbocharger
Disconnect the negative terminal of the battery
We clean the surface and the oil inlet to the turbocharger.
We apply penetrating fluid to the nuts and bolts of the turbocharger-exhaust manifold connection.
Removing the air filter
We remove the air supply sleeve
We loosen the tightening of the pipe clamp to the turbocharger adapter
Disconnect the pipeline
We unscrew the nut of the clamp for fastening the inlet pipe of the neutralizer to the adapter of the turbine pipe and move the clamp along the pipe
We unscrew the fastening nuts and remove the adapter of the turbine pipe
We loosen the tightening of the fastening clamp
Removing the pipeline adapter from the turbocharger to the cooler
Unscrew the bolt of the holder for the oil supply hose
Unscrew the bolt the fitting for the hose tip
Disconnect the hose and remove the sealing washers
Unscrew the two bolts securing the flange of the oil drain pipe from the turbine bearing
Disconnect the tube from the turbocharger housing
Unscrew one bolt
We unscrew the three nuts securing the turbocharger to the exhaust manifold
We remove the turbocharger.
We check the operation of the bypass valve drive.
To do this, move the rod (arrow in the figure), the valve lever should move smoothly, without jamming, and after releasing the rod, it should return to its original position.
Checking the adjustment of the bypass valve drive
In its free state, it should be firmly pressed against the saddle.
If the valve does not fit tightly to the seat, then loosen the lock nut.
Turning the adjusting nut, we achieve the desired valve position.
After adjustment, tighten the lock nut and check the tightness of the valve.
If necessary, remove the tip of the oil drain tube from the turbine bearing from the hole in the cylinder block.
Install new rubber O-rings on the tube end.
Disconnect the oil drain pipe flange seal from the body
We replace the seal. We clean the mating surfaces of the turbocharger, exhaust manifold and front pipe.
Install the turbocharger in reverse order.
We replace the gasket of the connection of the turbocharger with the exhaust manifold
We replace the gasket between the turbine adapter
We collect all the parts in reverse order.
Before installing the turbocharger, apply a thin layer of graphite grease to the turbocharger mounting studs.
Tightening torque for the three retaining nuts and one bolt for the exhaust manifold turbocharger 24 Nm.