My 1989 Putz was needing the small hose's changed,I wasn't looking forward to it cause I figured it would be very expensive boy was I wrong, I found out that Putz parts will sell hose's cheaper than anybody for example 2 -24 mm X 600 mm thats about 24 inch's long cost 13.69 each even the long one's on the slewing which are 5300 mm are just 71.70 I have already changed out all of the section cylinders about 26 in all, these are the hose's that get direct sunlight, and mine were  cracked bad.The only problem I had was with the pump spec's they send some with the smaller fitting mine on the boom are all 24 mm wrench size they show on their spec's 22 mm wrench size. I will have some to return after I receive my last one on back order.

ED

Don't they offer a spare hose kit for carrying on pump?

Many I would think they do but mine were all bad with the wire braid standing out I'm not sure about how old they were some could have been put on when it was built new, I had one split on the second section back in August I purchased 2 from a local supplier they were 1600 mm long and cost 101 each  the same size from putz was less than 50.00 each.