Madman - be quantitative to validate you claims. Words without supporting quantitative data is like trying to hold jello in your hands when it is 90 degrees F outside.
What was the maintenance cost/hour over a 5 year year period of this Hyster unit(s) you speak of, operating in a normal & clean single shift operation, 1080 hours/year usage ten year ago? Then do the same for 5 years ago. Assume a new units for each of these time periods. Not interested in info on a unit less than 5 years old - initial warranty coverage seems to distort the information as well as units covered under extended warranty programs. Then do the same for two shift operations or 2200/year same or similar operations.

What you stated is similar to the descriptive adjective, heavy duty,commonly used in brochures - that is the xyx lift truck is equipped with a HEAVY DUTY bearing, axle, reach assembly, carriage, drive axle, air cleaner. In 41 years, I never read anyone that said there truck had a light duty. Yale came close to doing it when they described their small wheel base 4K lift truck (ICE cushion pneumatic & elctric sitdowns & one some reach models too) - they said it was designed for intermediate operations - but sales folks sold them into the wrong operations - then the hoops came off the barrel.

I once had a customer in the mid 70's that had "fleet management" responsibilites of 3500 forklifts operating in wood products (plywood & lumber) manufacturing & distribution facilities in all 50 states. On my first call he stated his phiosophy on sales people & it was "If a sales person states his claim verbally - I believe nothing he said. If he puts it in writing, I believe only 50% of what is stated & it is always hard to figure out what 50% he should believe." His name J.D. Mills. Never forgot that comment & what it meant.