Re: Want to Talk to Experienced Engine Rebuilder

Posted by Tony L. on November 27, 2003 at 14:37:38 from (24.202.93.12):

In Reply to: Want to Talk to Experienced Engine Rebuilder posted by moonlite on November 23, 2003 at 16:31:13:

Reconditioning pins and journals

3 principal methods are employed for reconditionnning the crankshaft pins and main journals (a)grinding to underzise dimensions, (b)metallizing the surface to original size and (c)chrome plating to original size. Building up surfaces by submerged arc welding is also used but to a lesser degree.

When grinding undersize, bearing journals are ground and polished to original specifications and standard undersize dimensions. Journals can be re-hardened if necessary but in regrinding to standard undersizes, depth of the original hardening is generally adequate to retain hardness.

Diesel engineering handbook.

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