Resolve Low Hydraulic Fluid Issue

What happens here

During operation, the mini loader starts emitting an unusual, loud noise, prompting the operator to investigate. The issue is quickly identified as low hydraulic fluid. The operator retrieves a 5-gallon bucket of "Traveller Premium Anti-Wear Hydraulic Fluid ISO 46" and a homemade funnel, crafted from a Mountain Dew bottle, to add fluid to the reservoir. Noticing the dipstick is unmarked for fluid levels, the operator takes the initiative to scratch a mark onto it for accurate future measurements, following advice from the equipment supplier.

Goal: Diagnose and rectify low hydraulic fluid in the mini loader.