Cummins VT-555-M advice
Hi folks, I'm new to diesel motors, and I've got a problem. While down in the engine bay topping up oil, cleaning up etc, I noticed a valve on the side of port engine near the front that was closed, I have no idea if I bumped it closed (it moves crazy easily). The engine has 2 red hoses running next to it, both have a valve on them, the one toward the back is open the one toward the front is closed (circled in red). What are these 2 hoses, and should both valves be open?
Thank you for you help