Daewoo ST Series Instruções de Operação descarregar pdf (Página 151)

7.4.3. Inspection

As the condition of turbocharger depends greatly on how well the engine is serviced, it is very

important to maintain the engine in accordance with the specified maintenance procedure and

pay particular attention to checking oil & air leaks, unusual sound on running.

1) Checking of the rotor for rotating condition

The inspection of the rotor assembly for rotating condition should be performed by the

degree of unusual sound on running. If a sound detecting bar is used, install its tip on the

turbocharger housing and increase the engine revolutions slowly. If a high-pitch sound is

heard every 2~3 seconds or continuously , it means that the rotor assembly is not normal.

In this case, as the metal bearing and rotor are likely to be in abnormal conditions, the

turbocharger should be replaced or repaired.

2) Checking of the rotor end play

The radial and axial clearances of the rotor should check after every 2,000 hours operation.

This precaution will enable measuring for any wear of axial clearance bearings to be

detected in good time before serious damage is caused to the rotor and bearings.

Disassemble the turbocharger from the engine, then check the rotor axial play and radial

play.

(1) When disassembling the turbocharger, be sure to plug the oil inlet and outlet ports

(2) If the measured axial and radial plays are beyond the limit of wear, replace or repair the

turbocharger.

•

Measuring rotor axial clearance

•

Measuring radial clearance

- 148 -

EA7O5011

바이스

게이지

터보 하우징

축 좌,우 움직임

마모한계 : 0.12mm

EA7O5012

게이지

바이스

오일 입구

양 축을 잡고 상,하의

간극을 측정함

원주 방향

마모 한계 : 0.58mm

오일 출구

EA7O5012

Radial clearance 0.12 mm

Radial clearance 0.58 mm

Turbine wheel chamber

wear limit : 0.12 mm

Magnetic vise

EA7O5011

Magnetic vise

Dial gauge

Move the

turbine

shaft in axial

direction

Move the turbine shaft in both

direction simultaneousty

Oil inlet

Radial play

Limit of wear : 0.58 mm

Dial gauge

Oil outlet

1 2 ... 146 147 148 149 150 151 152 153 154 155 156 ... 182 183

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Daewoo ST Series Instruções de Operação Página 151

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