I have a cat 416 backhoe that keeps burning up starters. Can't figure out why. Any Thoughts?

There is a check valve on Ls for each user and one is open where the message from the lever is leaking out.

How close is it to the exhaust ?

Try to loosen the nuts on the fuel lines going to the injectors and crank the engine till all the air bubbles are removed from the system. Don't crank the engine for longer than 30 sec at a time letting the starter cool down before cranking again.

Go to this link, search the forums for help with 420 cat hour meter. It is probably a simple fix even if you have to replace the unit. Join the forum for free, and ask your question in the tractor-backhoe forum. THANK any one who offers assistance and let the forum know what you finally did to fix the problem so WE CAN ALL benefit from your experience! There are many wise operators,owners, and mechanics on this site.

You would think there would still be some warranty left on it, or at least some free tech help from Cat. Have you checked the rocker switch that moves it into four wheel drive - left side of dashboard. Sometimes these become faulty if used continuously. You can get help at this site below if you want to ask very knowledgeable people, and thank them for any assistance!

http://www.heavyequipmentforums.com/showthread.php?t=19510

If you go to this site, and join, AFTER you make five posts, ie: comments on any topic anywhere on the site - five times (hit reply button on any post and comment) you can ask any questions concerning any equipment known to man or beast. It's free and a very good site with tons of great info and pictures.

From what I have discovered with my own Cat 426 it is likely the forward reverse selector. It has electronics and contacts that will NOT allow the starter to receive any power if the contacts are open as there are safety interlocks that will not allow the machine to start.

Starter solenoid need to be replaced, also check all ground wire connections for corrosion and clean them

I’m happy to assist further over the phone at https://www.6ya.com/expert/dan_91204789c5bd4b93

Sounds like the ram that pushes out and retracts the extension has come apart inside. You are going to have to open it up for inspection.