Little safety information for you.
Hydraulic injection injuries are very damaging/dangerous.
Never look for a pin hole leak on equipment unless you are well trained and know the safe process.
A “bee sting” of hydraulic fluid into the skin runs the risk of an 85% chance of LOF (loss of flesh) which means amputation or surgical opening the flesh up.
The oils cannot be absorbed and starts to allow compartment syndrome type conditions that left untreated will cause death to that tissue.
Do your research and inform your people.
Quick response is your best hope after an event.
Education is best prior to an event.
A great short clip on this