I also own a 2004 LK 3054 XS
TLB. I've had no problems to date, I purchased with 151 hours I now have 225. Strong machine, great loader, the backhoe is strong. I like the design and size, perfect for me, I can load a pickup truck, but fit into spaces a bigger machine could not.
The machine requires the use of glowplugs on every start, my prior Kubota was the same way. There are machines that require glowplug all the time and machines that do not and then there are machines with no glowplugs at all (diesel). My JD 350B dozer had no glowplugs.
I am very pleased with my 3054 and am happy with my purchase and would do it again.
I understand there were pump problems, I also understand they went right away if bad. I've had wallace check my history and there have been no warranty work performed on my machine, not sure if I've got the aluminum pump or not, will check today though as I had not thought of the magnet trick. Either way, even if I did need to replace the pump sometime down the road I'd be ahead of the game. I'd also chase Kioti to see if they'd help me out as it was a known problem.
2006 I'd expect for your pump to be of a newer version.
Again, I'd buy mine over again without hessitation. Take a good look at the loader bucket on the 1231 loader, much heavier built than the others I've seen.
Good luck,
Joel