How long do hoses last?

/ How long do hoses last? #21  
Hoses on my garage-kept B2400 started springing pinhole leaks at about 18 years. I replaced the first two as they failed. The local dealer has never had what I needed in stock, so had to order and make a return trip to pick up the hose a week later.

A year or so later, another leaky hose. I tried ordering online from another dealer, took several tries to get the right hose (package labels did not match the contents). Tractor was down about three weeks.

Next leaking hose, I was tired of messing around and decided to replace all the remaining original hoses. Tried the local dealer again as I wanted to see that the parts were correct. Dealer said six weeks to order due to pandemic supply issues. I found a Parker distributor nearby, took the old hoses to the store, and they made new hoses in about twenty minutes while I waited. They fit perfectly, the cost was a little less than Kubota prices, and the tractor was back in use the same day.
 
/ How long do hoses last? #22  
I have a peiiibone 30 tough terrain crane. 1965 model. Still has mostly original hoses.
 
/ How long do hoses last? #23  
Had a 240D Benz into its 26th year, and it had the original hoses, rad and heater, when we sold it. They were still limber. Not sure about the ones that never are limber.
 

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