Dewill,
140 F is pretty HOT. Its hot enough to scald you.
In Ontario Canada where I live the passed a law saying that hot water heaters had to be set to 120F or below to prevent scalding when installed.
I open mine up and set it to about 140F (this is almost the max setting) so the hottest water I get out of my tap is 140 or a little below. This water steams, its not just warmed up a little, its HOT.
Also since I suspect you use Celsius where you live,
140F is about 60C.
No experience dyeing parts, but I know temperatures.
