Sears Hydraulic Jack


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Old 03-09-22, 03:16 PM
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Sears Hydraulic Jack

probably not the right forum, but I have a Sears 3 ton hydraulic Floor jack Model # 875.501153 that is not lifting the ram as high as it used to. It probably needs fluid but the manual points to a fill port between the handle and the back of the steel bar that lifts the round disk that would fit under the frame of a car. The only thing I can see there is a small bullet shaped gray protrusion that is poking up from the cylinder. Is that it? How is it removed to insert oil.? Book says use Hydraulic Jack Oil. Is that oil super special?
 
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Old 03-09-22, 04:00 PM
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https://www.youtube.com/watch?v=pe7NY1Nh6sQ

Pretty much looks the same as my 2 ton, 40 year old sears, still going strong, floor jack.

Jack oil, nothing special, every auto parts store will have!
 
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Old 03-09-22, 04:34 PM
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That is the rubber fill plug. Pry it out with a flat blade screwdriver.
Fill the jack with oil while in down position so it will not be too much oil.
Replace the plug. May take some effort.
Jack oil is available at auto parts stores and internet suppliers.

RR
 
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Old 03-09-22, 04:42 PM
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Well Marq, if I had wiped away 10 years of leaking fluid and dirt I would have seen the fill port that showed in your video. Thankfully I wrote in before I went after that bullet shaped thing that the manual was pointing at! I knew the O ring was going too, and got that fix from video too. Thanks for the Reply !
 
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Old 03-09-22, 05:37 PM
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Rough Rooster, are there two fill plugs for this jack.? I didn't see the one at first because of the dirt and old oil (the one in the video Marq1 posted) The video never showed the rubber one, but the manual did!
 
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Old 03-09-22, 06:48 PM
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Not really.
Many people mistakenly use the port where some pump valves and springs are under the plug.
The real fill port is the one on the barrel that is stoppered with the rubber plug.
I have several of these jacks and have rebuilt many over the years.
Used my 1930's Hein Werner today to change tire on my pickup.
By the way, if you destroy your rubber plug, they are available from Amazon.
Can't always trust YouTube!

RR
 
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Old 03-09-22, 08:32 PM
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Well all I have to do now is erase the notes I made in the manual noting the location of the "FILL" plug, (along with going after the bad O ring I know is letting oil ooze upward onto the rest of the Jack.

Thank you for jumping in! (I've been down that Utube bad info route before lol)
 
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Old 03-09-22, 08:57 PM
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Most likely your oil leak is around the pump piston.
It has a cup on the piston bottom and an O-ring in the barrel of it.
The barrel should unscrew out of jack base for easier O-ring replacement.
Fairly simple fix if you get the right parts.
Have fun.

RR
 
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Old 03-10-22, 07:20 AM
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Yes, I can actually see the oil moving up and out of the pump piston, When you do everything yourself, it gets bad when the tools you use don't get the attention they need because you are fixing everything else with them lol
Thanks again for your comments!
 
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Old 03-10-22, 11:31 AM
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I found the jack oil, but no one around here has the "O" ring that goes on the pump plunger. Suggestions on where to fine one of those?
 
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Old 03-10-22, 01:40 PM
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Google your jack by brand and model#.
You should be able to get a parts diagram with part #'s.
Search for that part#.

RR
 
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Old 03-10-22, 02:37 PM
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I went back to Marq1's video and got the specs on the O ring from his package. I don't remember what i did, but HIS package of O rings came up for sale on Ebay and after measuring mine vs his specs I clicked on Buy it now and one is on its way.. I was looking at O rings at several auto parts stores this morning and was getting a bit frustrated with Sears but should be on my way now. I managed to remove the rubber fill plug without destroying it, and filled up the cylinder with Oil. I have a feeling this thing may have to be bled to get it all together, but on we go.
Thanks for your help!
 
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Old 03-15-22, 05:27 PM
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O ring came today from Georgia, (ebay Veteran Supplier) fun to put in, more fun with the rubber fill plug. I was amazed that it started lifting right away and no issues with air bubbles. Great to have it off my rolling tool bench! Thanks to Marq1 and the Rough Rooster! Oh Yeah, nothing else was leaking!
 
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Old 03-15-22, 07:27 PM
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GOOD ON YOU!!

RR
 
 

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