please help identify this floor jack

[1oldman]

Hi all. I am a new member of this great site. I registered so that i could join in the fun and hopefully learn something. I enjoyed reading about the vintage garage restoration here as well as other projects others have delved into. I am fairly mechanical and have restored quite a bit of old machinery.

I came across an old floor jack for sale. Needing one, and preferring good 'ole made in the USA heavy iron, I bought it knowing that it would need a full restoration.

First, I need help identifying the jack.The hydraulics are labeled Lincoln. My exhaustive reading of this site make me believe that it is a Walker J134 (or 93657), rebranded. Is this correct?

What are the differences between a Walker 93657 and a J 154?

Does anyone know when it was made?

 

[Hiball]

The J134 and 93657 are generally the same kit and the only difference between the 2 are frame styles (later 93657) and era. The cylinder does have a torque rating of 925ft lbs, but generally doesn't need to be removed, unless you have cylinder issues. The tank nut, which is probably a spanner (unless it was switched out by Lincoln when it was rebuilt) is torqued to 300+ ftlbs. This one will definitely have to come off, as it allows access to the main ram seals etc. I always use a dab of loctite 518 aneabolic gasket material wherever metal meets metal, which reduces the amount of torque required to seal the reservoir. Don't get me wrong.. It still has to be fairly tight.. Leaking reservoirs are No good. As far as specialty tools... You will need general hand tools to remove the hydraulic unit from the frame, hand impact driver to remove the valve plugs, hook/pin spanner to "correctly" remove the compression nuts that secure the packing on both pump pistons and maybe the tank nut. Your jack was made from the 70's into the early 80's.

 

[Mohawk Dave]

no help here...but beautiful jack.

 

[1oldman]

Thank you Hiball. So then I gather that this is a Walker manufactured 93657 "later" style frame.

 

[Hiball]

Thank you Hiball. So then I gather that this is a Walker manufactured 93657 "later" style frame. The only tool that I don't have is the hook/pin spanner. I suppose I can buy one if I can find it, or make one, or is there another way? Do you have rebuild kits for this jack? Or do you need to see the hydraulics first? Is there a part # on the hydraulics that I need to refer to when obtaining a rebuild kit?

I sent a Pm regarding the seal kit, but I would first tear it down just to make sure there is no major issues inside, before forking the money out. Any j134/93657 seal kit should work in your case. As far as the adjustable hook/pin spanner goes, you can generally remove the nut with a punch... But you will damage them and if you try and use a punch upon re installation you lose your sense of how tight your compressing the packing.

Just so we are clear... I don't recommend using a punch on the pump piston on the compression nuts. It's just a option... And comes with consequences, like damaging them and or marring up the pistons. Also...if your Jack has the spanner type "tank nut" don't even think about trying to use a punch or Air hammer. It more than likely wont work and will definitely damage the piece.

Here is a thread where a member made a socket to fit the spanner nut, and then removed it with a impact.

 

[killerkite]

Hello Hiball; I have a Lincoln 93657 4-Ton Floor Jack that is slowly leaking down under a load. It has no visible leaks. I repair Hydraulic tool and I am familiar with Check valves. Never performed surgery on a floor jack but am excited to have the opportunity. I was told I needed to find out what "Series" it is. The only letter found in the serial number is a "D".
Questions:
Is there typically a "starting point" for trouble shooting jacks with this problem?
If a rebuild is needed: Will a general seal kit for a 93657 do the job?

 

[Hiball]

Hello Hiball; I have a Lincoln 93657 4-Ton Floor Jack that is slowly leaking down under a load. It has no visible leaks. I repair Hydraulic tool and I am familiar with Check valves. Never performed surgery on a floor jack but am excited to have the opportunity. I was told I needed to find out what "Series" it is. The only letter found in the serial number is a "D".
Questions:
Is there typically a "starting point" for trouble shooting jacks with this problem?
If a rebuild is needed: Will a general seal kit for a 93657 do the job?

Lemme say this.. Generally when your talking about "Leak Down" it really depends on the Severity and its tough to diagnose over the Web. When this jack is under load there are really only a couple of Sealing points, 1st and foremost is the Main Ram Seal/Cylinder surface, Release Valve and the Upper Balls for the Power/Speed side. You can generally rule out Ball/Seat conditions by simply putting the jack under load and checking for Handle feedback, As seating issues will result in pressurized oil being forced around the upper ball and into the Pump cylinders and transferred to the Handle. The Next Location is where the Cylinder threads into the block, This IS NOT common as they are torqued down from the factory to 800+ ft lbs account its Metal to Metal contact. The Release on these jacks is generally solid also, IF it hasn't been damaged by over tightening, Improper installation after servicing etc.. Your Jack is a Lincoln, Its sounds like a D series, its possible that the Main seal could be the culprit so If the Jack hasn't been abused, Sat in a deep wet corner for Ages its possible that it can be simply serviced with a New Seal kit, But without tearing into the Jack and inspecting the ball seats for Rust, Cylinder for Abnormal Wear/Pitting, Rod Surface etc.. Its impossible to say how much machining you will need. I didn't Join this Site to Sell Kits, I always recommend a tear down and inspection prior to forking over the Cash for a kit that may not remedy your problem.