The lift is run by the pto / pto pump.. speed of the pto is directly proportional to speed of the hyds. 20' may be 'normal'.. that's not too far to get max height, when starting out from a stop.. etc.. with 3pt on the ground. In any case.. yes.. heavier oil.. like 90w mineral oil will help that response a bit, vs the thin UTF oil. Also.. it's time to pull the dipstick/inspection cover and raise the lift with a load on it and peer in with a flashlight.. look for squirts and sprays from above ( top gasket, hyd cyl gasket, or piston rings.. ) and from the right side.. ( standpipe leak) and / or turbulence in the oil aft of the pump ( relief valve) when you shut the machine down with the load lifted. report back what you find. Also.. how long will it hold a load with clutch in or engine off... if more than 'minutes'.. then the piston is not too horrible.. ( 30m - 1hr+ is bragging rights time... Soundguy
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