Surely all the American-made parts are no longer original working items?
Cute English humour.
Actually, the main hydraulic pump is not German, but US. And its all original without any repairs but a leaking o-ring. The swing motor, which rotates about 20,000#'s of US iron, quick enough to get you dizzy, is original and strong. The rotator bearing, which is about the weight of your car, kept well greased, should go 15,000 hours.
One of the boom cylinders - these are all John Deere built, weighs about 1200 pounds, and they have a fairly predictable rebuild life of about 4 to 8,000 hours. This is NOT a Saturn Vue.
Absolutely no gears or drivelines - pure hydraulic motion, which means if you meticulously change the filters and add about 10 pounds of magnets to the bottom of the 85 gallon hydraulic tank, and use DELO instead of hydraulic fluid, you can get 15,000 hours out of most components.
I have a pure US built JD dozer, has an unheard of 15,000 hours on it , and have only changed the muffler and rebuilt cylinders. Starts in the SNOW
without any glow plugs or ether with a 1/2 second click of the key. Not a Mercedes or Volkswagon diesel can come close to its incredible mechanics. Same for the starting of the excavator engine.
There is a good reason why all those John Deere machines are roaming your English countryside.