A319/320/321 :after overheat: re-engaging hydraulics to raise gear

[alexious85]

Hello
In the case of a green reservoir overheat , by ECAM procedures the green pumb and PTU are turned off . Then on approach if the overheat condition is out the systems are reinstated . If the overheat condition is still present , then having lost green hydraulics , the gear is to be extended by gravity and as such no retraction is available . If you go around the gear and gear doors will remain open and fuel consumption goes up by a factor of 2.1 .
My question is the following : if you are really tight on fuel and the aerodrome of intended landing is not desirable any more , could the crew re-enstate the green system , reset the emergency gear extension for the sake of raising the gear ? ( in the FCOM it says it can be done on air for training purposes)
Assuming this can be done , what are the dangers of reinstating a hyd. System in an overheat condition?

[yotty]

I expect the danger of reinstating a hyd. System in an overheat condition would result in a meeting with your flight manager for tea without biscuits! :p

[alexious85]

Yotty was that a statement taking into account the above stated condition ?
Was also looking for an answer of the type that states what happens in a hydraulic circuit if overheated fluid that enters the reservoir is allowed temporarily to do some work.
You have to take in account also the hydraulic fluid temperature at the moment of reinstatement will be less than the time the initial ECAM came up