ebinmaine 67,565 #26 Posted December 31, 2022 8 minutes ago, rmaynard said: I guess that I shouldn't compare the lift mechanism on a Wheel Horse to a JLG man lift. They will stay up and extended as long as you don't touch the controls. It's possible they have a bleed down rate that's FAR more stringent than most hydraulic systems. It would make sense given that they move people as the predominant cargo. Every crane I've ever been around has at least one circuit that would leak down over enough time. 2 or 3 weeks mind you, but eventually. But the inspection criteria may be very different for a person lift. Share this post Link to post Share on other sites
pfrederi 17,741 #27 Posted December 31, 2022 Only have 1 Eaton 1100 Lift will not operate at first winter or summer. Changed to Mobil 1 10w30 synthetic no improvement. 5 Sunstrands run on ATF all pick up instantly and drive winter or summer 3 Share this post Link to post Share on other sites
Ed Kennell 38,200 #28 Posted December 31, 2022 1 hour ago, pfrederi said: 5 Sunstrands run on ATF all pick up instantly and drive winter or summer I have only Eatons now, but some of my past Sunstrands were filled with 10w30 and they all lifted instantly. I feel this slow cold lift is an Eaton quirk. It is a mystery though, why some are not slow. 2 Share this post Link to post Share on other sites
Ed Kennell 38,200 #29 Posted December 31, 2022 2 hours ago, rmaynard said: a JLG man lift. They will stay up I could be wrong, but I thought man lifts had a mechanical safety. I was thinking scissor lifts, but bucket trucks would not have a safety. Share this post Link to post Share on other sites
rjg854 11,377 #30 Posted December 31, 2022 Most man lifts are designed to lock in place if not running, or if something happens to the hydraulic system, so it won't drop the the person using the lift. 2 Share this post Link to post Share on other sites
Metal Blender 6 #31 Posted January 12, 2023 W H,Classic 1990/312-H/Eaton 1100/Virginia, low temp sluggish hydraulics,and noticeable constant noise from above the trans-axle .That could be the hydro unit starved of oil.The same transmission system acting differently in different models could be the answer.While the units are basically the same the oiling systems are different configurations of valves and hoses (lines). I was directed to start with an oil change and new filter as the tractor runs great in warm weather.These machines are well built and the 1100 is a nice system if we had been discussing a box store model it would most definitely be the unit getting replaced lol.I work mine like a horse too lol ,33 years and counting.The attachments are 312-H 1990/Eaton 1100 1 Share this post Link to post Share on other sites
peter lena 8,632 #32 Posted January 12, 2023 @rmaynard , been using an old style INCANDESCENT ROUGH SERVICE BULB , in a 10 " reflector under my engines , just gives off enough heat , to warm the engine , why not try that on a hydraulic set up ? got the bulbs on line , they are silicone dipped , wal mart has the clip on reflector , to stand up on or clip onto . have that on 3 engines , it works , pete 1 Share this post Link to post Share on other sites
peter lena 8,632 #33 Posted January 12, 2023 @rmaynard https://www.lowes.com/pd/Utilitech-Incandescent-Clamped-Work-Light/5014077199?cm_mmc=shp-_-c-_-prd-_-elc-_-bn this the type of bulb reflector I use , would easily add some heat to a hydraulic oil source , worth a try . use the repetition of a problem to make a cure for it , very scary to many , personally love a track to a problem . warm oil , pete 1 Share this post Link to post Share on other sites
