[ROVERNET - UK] P6B Sticking Handbrake

[Fritz Rauschenberg]

You meant to say metal CONTRACTS when it is cooled.

JOHN HALL wrote:

> When ammonia evaporates it reduces the temperature of whatever it is in
> contact with. Metal expands when cold. Usually enough to cause the rust to
> loosen up. Then the liquid wrench can penetrate the loose rust.
>
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