Color of Hydraulic Oil has Changed. Is It Caused by Water Leaking? How to confirm?
It is not certainly because of water leaking. According to our experience, it may cause by oil quality, improper installation, or condensation of water dropping into oil tank...etc objective factors.
Here with 2 simple tests:
Check oil tube: Remove oil tube and fill it with oil then wipe the edge of tube. After that, keep cooler working 1-2 hours continuously. If oil doesn't flow from edge of tube that means cooler is no problem.
Check water tube: Close water inlet first, then remove both sides covers. Then blow the water inside of copper with compressed air. And wipe wipe the edges of water tub with a dry cloth. After that, keep cooler working 1-2 hrs continuously. If oil doesn't flow from edge of water tube that means cooler is no problem.