One of three plastic nozzles near the top of the diesel tank broke off. All three nozzles PUSH fuel back in to the tank. I have no idea why. I can close off the hose and it runs fine - but will it hurt anything? The hose is connected to the #1 cylinder injector. Another of the 3 plastc nozzels comes from the #4 cylinder injector. The third one appears to come from the fuel pump. CAN I JUST CAP IT? DO I NEED TO TIE IT IN TO ONE OF THE OTHER HOSES?

NEW INFO: The problem is not with the hose - it is the nipple that sticks out of the tank. It broke off flush with the tank.

I would suggest fixing it properly. Replace the hose.

Good luck bud, I gave you what advice I thought was deemable. Good luck with it. And you may wish to read the site rules. And this is improper usage of the rating system.
GOOD LUCK!

Hey, if you don't want to fix it properly, I am not wasting my time and hope no one else does.
GOOD LUCK.

and coming back and editing your question to add an update, then give a reddie is not wise e4x6.
p.s.
good luck!

One of three plastic nozzles near the top of the diesel tank broke off. all three nozzles PUSH fuel back in to the tank. I have no idea why. I can close off the hose and it runs fine - but will it hurt anything? The hose is connected to the #1 cylinder injector. Another of the 3 plastc nozzels comes from the #4 cylinder injector. The third one appears to come from the fuel pump. CAN I JUST CAP IT? DO I NEED TO TIE IT IN TO ONE OF THE OTHER HOSES?

NEW INFO: The problem is not with the hose - it is the nipple that sticks out of the tank. it broke off flush with the tank.
I apparently don't have near as much time as you do. I may not have read the rules of the site - but you didn't read what the problem was. The hose is fine. Never mind - I got the answer asap from tractorpoint.com

Great I am glad. And my time is limited, but I am dedicated to trying to help others on this site.