What does it means when the HST squeals on my BX24? It doesn't always do it, but when it does do it I'm probably overtaxing the hydraulics. Does the squeal indicate that something is wrong or just normal when the system is pushed past it's limits?
As Kenny said, don't do it because it will heat the oil. But also, don't be alarmed when it happens. That's what it is there for and you won't break anything.