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10 members (sron48, Donf, Bill Hanlon, rfs56trk, Hanks custodian, Wally / Montana, ranchojuan, jkreiner, fonz8261, TexasJim50),
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2005 Posts: 408 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 408 | My old reliable cherry picker has lost its ability to get it up any more, do they make viagra for these things??? Th lift has had a slow leak for years but it never caused issues. How do you fill these things back up? Is it hydraulic fluid or oil?
Thanks, Paul | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | hydraulic jack oil - should be a small fill plug on the side of the jack - you can tell it needs oil when each pump doesn't do as much as it once did
Bill | | | | | Joined: Oct 2005 Posts: 408 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 408 | if i open the plug oil comes out, how do i refill it? the plug is at the bottom of the jack. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | If it's full of oil it might be a leaking valve that's letting the oil slip back by as you are jacking. 
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| | | | | Joined: Oct 2005 Posts: 408 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 408 | if the plug is at the bottom of the jack how do you know if it is full or not? | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | usually you need to lay the rig on it's side so the plug is a high point, like with a bottle jack
Bill | | | | | Joined: Oct 2005 Posts: 408 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 408 | thanks Thats what I needed owe you one.
Paul | | | | | Joined: Sep 2010 Posts: 49 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2010 Posts: 49 | Be sure your jack is scoped all the way down when you fill it up with jack oil. | | | | | Joined: Oct 2005 Posts: 408 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 408 | | | | | | Joined: Feb 2004 Posts: 29,777 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,777 | If it's leaking down with a load on it, there's a problem with the piston seal(s). If it's failing to reach its full travel, then adding oil will help. Any lightweight oil like power steering fluid or EP-32 hydraulic fluid should work OK for refilling. Long-stroke replacement jacks aren't expensive or hard to find- - - -try Northern Tool & Supply or maybe Harbor Freight.
Jerry
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| | | | | Joined: Apr 2006 Posts: 273 Shop Shark | | Shop Shark Joined: Apr 2006 Posts: 273 | If it's full of oil it might be a leaking valve that's letting the oil slip back by as you are jacking. I have a floor jack that comes down slow after I raise it up, because of a leaky O-ring. In our hot summers I just replace the oil with 30-50 weight so it "takes its time" to drop down - long enough to get the jack stands under the truck. In the winter any oil will do because its almost like molasses and the jack comes down just as slow. I do the jacking before I heat up the garage. Its not a major problem so I never bothered replacing the seals yet - I never go under without stands anyway. So hey wodniw, when you find the filler try thicker oil and see if there's an improvement. Hope this helps.
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