Doosan AD158TI, Руководство по эксплуатации и техническому обслуживанию

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Main parts maintenance - 152 -
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Turn the bearing housing over and repair
the process.
7.4.6. Cleaning
With the turbocharger completely dismantled for overhaul, soak all the components in a non-caustic metal
cleaner to loosen deposits. Bead blast the turbine housing if chemicals do not clean sufficiently.
On aluminium parts a bristle brush can be used. Never use a wire brush or metal scraper on any turbo-
charger component. Ensure that all the palls are finally cleaned with an air jet, especially drilled passages
and machined apertures. Turbine Wheel: In the event of carbon build-up, it may be necessary so carefully
blast the Piston Ring Groove area of the turbine wheel using low grade shot medium.
Caution :
Shot blasting specific areas for long periods of time may effect component balance.
The surface adjacent to the turbine and compressor wheels on the stationary housings must be clean,
smooth and free from deposits.
7.4.7. Inspection
Caution :
Do not attempt to straighten the turbine shaft.
a)
Place the shaft on a V-block, using a dial
gauge rotate the turbine wheel and check
for movement on the dial gauge. Replace
the assembly turbine wheel if it is bent.
Max shaft bend allowed 0.025 mm
(0.001 ins).
EDV2218057
EDV2218119
Shaft bend
(Max.)
mm in.
0.025 0.001