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Cat D7 3T-4T crankshaft.

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9 months 3 weeks ago #254373 by D74T
Could I please have some advice on the reliability of a crankshaft that has been rebuilt to standard/standard with hardchrome? It is a crankshaft from D7 3T part no 7B7452.
Thanks.

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9 months 3 weeks ago - 9 months 3 weeks ago #254382 by Old Magnet
Replied by Old Magnet on topic Cat D7 3T-4T crankshaft.
Hard chrome plating the journals gives the ultimate in wear surface.
There are a few challenges to doing it right, adequate thickness, bonding and minimum voids (expect some). Can be a challenge to get someone to do the grinding to size.
Last edit: 9 months 3 weeks ago by Old Magnet.

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9 months 3 weeks ago #254384 by D74T
Replied by D74T on topic Cat D7 3T-4T crankshaft.
Thanks for that information, are there issues with hydrogen embrittlement causing the crankshaft to break in this application?
Cheers.

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9 months 3 weeks ago #254385 by Old Magnet
Replied by Old Magnet on topic Cat D7 3T-4T crankshaft.
Yes, hydrogen embrittlement is inherent in the process but can be minimized with proper heat treating process.
The following user(s) said Thank You: D74T

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