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Hardened Oil Pump Gears, They are Done!
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Author:  emsvitil [ Thu Aug 20, 2020 7:55 pm ]
Post subject:  Re: Hardened Oil Pump Gears, They are Done!

How hot can you get the gear before you have to worry about any heat treating it may have?


I'm just wondering if the technique I used with my lawn mower flywheel would work.

I cranked up the gear puller, then took my plumbers torch to the flywheel. After about a minute the flywheel popped loose.

Author:  Doctor Dodge [ Fri Aug 21, 2020 10:16 am ]
Post subject:  Re: Hardened Oil Pump Gears, They are Done!

Kinda complicated because this is dependent on the amount of carbon in the iron / steel.
In general, you will not impact hardness if you stay under 1000 degrees F.
See this paper for more detail:
http://www.heat-treat-doctor.com/docume ... tIrons.pdf

DD

Author:  jcc [ Thu Sep 03, 2020 8:36 pm ]
Post subject:  Re: Hardened Oil Pump Gears, They are Done!

Quote:
How hot can you get the gear before you have to worry about any heat treating it may have?
.
I agree there is no one magic threshold temperature, but physical properties start to change I believe as the material approaches 700F.

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