I got a 955L ser# 13X1163 It was running good and then I heard a knocking noise from the engine. I hope it not what I think. Any advise on checking it out. Got plenty of oil in it, oil looks clean no water on stick. if gauges is right they all in green.. No excessive smoke from exhaust.
Drain oil and cut filter check for sparkles
Here's a link to a YT Video that illustrates the process. Probably the best explanation I have seen.
Can you describe the knocking noise?