Great site. 1st time owner. 1997 L2350. 550 hrs. Been changing all fluids and filters, but have to wait on changing hydraulic. Has small hydraulic leak. Not sure I trust the fill viewing window. Is there any other way to check level? (i.e looking into fill area) Added 2 qts and cannot tell if it's still low or maybe it's completely full. Window has this pale yellow look, and when I take off the filler cap I can see fluid about 1 1/2 inches down. Have to get busy removing snow. Am I ok with level? Thanks