Thanks for the all responses. Yes it is #18 in the parts book. What’s confusing is why the 2510’s had this line and most others didn’t? There was no check ball in the return fitting but a vent wire. I have had this tractor for the last 8 years and it has always been one of the best starting diesels I own to the point I was reluctant to tackle this job. But it all started because it was leaking fuel from what I thought was the hose where it goes into the timing window on the back side. It turns out it was leaking out of the throttle shaft instead. In order to put new seals on the shaft the pump has to come off, so since it has to be removed why not replace the flex ring too right? When we took the pump apart the flex ring was gone with no evidence of any pieces anywhere. One rivet was starting to get loose too. I'm replacing the flex ring with the solid weight retainer as it was only $30 more than the flex ring weight retainer. Unfortunately that is the least of my problems now as the cam advance screw broke when putting back together so I have a big problem now. Lesson learned is to get the right tools for the job. I only had the Bristol tool or modified T45 Torx bit and not the cam support bushing. I know people have had success with the tool only but the bushing minimizes side load on the screw when you’re reefing on it. The tech repair book also says to always replace the pin as I'm sure it got cracked during removal. It took two whacks with a drift pin to get it to budge.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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