Weeping cylinders and steel hydraulic lines

Couple of questions on hydraulics. The bucket cylinders on my Cat 931B used to weep a tiny bit right around freezing temperature but not when it was warmer or colder. It was around freezing today and they were weeping way more than usual, actually dripping oil onto the boom. Anyone else ever experienced this? I guess I need to reseal them but why they weep so bad at freezing temperature?

The other question is concerning steel hyd. lines. The lines for my 4 in 1 bucket are bent pretty bad...

Weeping cylinders and steel hydraulic lines

Weeping cylinders and steel hydraulic lines