US 5,295,300 AGranted

Salvage method for turbocharger bearing housing

AssigneeCummins Engine Company, Inc.

InventorJames J. Garrick, Jr.

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Abstract

A salvage method for a turbocharger bearing housing includes the steps of removing the bearing housing from the turbocharger, setting up the bearing housing on a lathe and machining the worn or damaged surfaces at one end of the bearing housing where such damage has been caused by the turbocharger heat shield. Once the metal is removed from the worn or damaged portions of the bearing housing a salvage sleeve having a hollow, generally cylindrical shape is pressed down onto the prepared surfaces of the housing. Since the assembly of the salvage sleeve to the machine bearing housing will be an interference fit, the salvage sleeve is heated so that it can slide freely onto the machined outside diameter of the bearing housing. Once the sleeve cools and the interference fit is established, the salvage sleeve is machined so as to reestablish the original dimensions of the turbocharger bearing housing prior to becoming worn or damaged.

Claims1

Dependent claims

A method of salvaging a turbocharger bearing housing which has damaged portions, the method comprising the steps of:

(a) disassembling the bearing housing out of the turbocharger, said bearing housing having an outer end face surface, an inner end face surface and an outside diameter surface extending therebetween;
(b) setting up the bearing housing on a lathe in order to machine the damaged portions;
(c) machining the bearing housing to remove metal from the damaged portions of the bearing housing, said damaged portions including part of said outside diameter surface and said outer end face surface;
(d) machining the bearing housing to remove metal from portions of the bearing housing which are not damaged, said portions including the remainder of said outside diameter surface and said inner end face surface;
(e) providing a salvage sleeve having a hollow, generally cylindrical shape, an outside diameter surface, an outer end surface, an inner end surface and an inside diameter dimension adjacent said inner end surface which is slightly smaller than the machined outside diameter surface of the bearing housing;
(f) heating said salvage sleeve so as to expand its inside diameter dimension to a dimension larger than that of the machined outside diameter surface of the bearing housing;
(g) pressing said heated salvage sleeve onto the machined outside diameter surface of said bearing housing;
and
(h) machining the assembled salvaged sleeve in order to reestablish the original dimensions of said bearing housing by turning down at least part of the outside diameter surface of the salvage sleeve and cleaning off the outer end surface of the salvage sleeve.

6 more elements

Dependencies are inferred from the claim text.