Repairs are conducted according to the procedures specified in the service instructions of the turbocharger manufacturers, with particular attention paid to tolerances of dimensions for mating elements. The major principle is using for each repair only original spare parts

The repair process includes the following actions:


1. Disassembly of the turbocharger.
2. Washing and cleaning all elements using ultrasound washers.
3. Control and evaluation of measurement points indicated by the producer.
4. Replacement of a set of spare parts.
5. Precise balancing and weight placement for the rotating assembly using     electronic dynamic balancers:

- 1st stage balancer.

We use it at the first stage of turbine refurbishment. It is used for dynamic balancing of rotors in all types of turbochargers on two planes, after disassembly of the rotors from the turbocharger housing, at a rotational speed of approx. 3000 rpm.

- 2nd stage balancer.

We use it at the next stage of turbine refurbishment, after replacement of bearing rings and seals and reassembly in the turbocharger housing. The 2nd stage balancer balances the unit simultaneously on two corrective planes at a rotational speed approx. of 40,000 rpm. Turbocharger operating conditions in this location are similar to those which exist in internal combustion engines.

- The last balancer.

We use this type of balancer when we want check whether at rotational speeds close to the nominal speed any additional dynamic phenomena will appear on the rotor. This may be, for example, the “cold” wheel moving away from the rotation axis e.g. as a result of bending of the axis end under the influence of torque load. The balancing process proceeds at a rotational speed of approx. 200,000 to 250,000 rpm.
Turbocharger operating conditions here are similar to those which exist in internal combustion engines: the turbine motor is driven by compressed air and the bearing is fed with oil at a pressure and temperature as in the engine chamber.

6. Final assembly.
7. Checking and possible adjustment of the charging pressure value.

A warranty certificate for the period of 24 months is provided for each turbocharger.