Recent content by ajchien

My eyes are squinting... Are those left over machining burrs at the edges of some of the slots? I would certainly smooth those burrs and sharp edges out. And, yeah, I think it’s wise to avoid maxing out the height on jacks that have that kind of design to prevent over extension.

The hcrcnow.com website has a pretty decent catalog of owners manuals/parts lists. You could compare your jack to the original manuals to figure out a model number. what you will notice is that many of the older designed/made in USA jacks will have complete parts lists and diagrams while import...

Or it will take extra time and effort. Here is a thread where Jeeper re-did his ball valve seats, it starts on post #56: https://www.garagejournal.com/forum/threads/got-a-snap-on-ya642.173844/page-2 and if the internal lifting cylinder is corroded/pitted, I believe there is some thread by...

Top jack is a Walker/Lincoln, likely some version of the 93632 or 93630. Second one from top looks to me that it is probably a Blackhawk relabel, maybe SJ1 or SJ2. Third from top looks like a Shinn Fu design. Bottom one looks to be one of the Chinese (probably Torin) copies of Japanese Yasui...

Walker made the jack. the red paint may indicate that it is a Snap-on relabel.

The hcrcnow.com website has a decent catalog of hydraulic jack diagrams you can search through. Sears has rebranded many jack designs over the years, so it’s kind of hard to guess what jack you have without seeing it.

FWIW, the weaver WA72 has a built in safety overload valve. The jack will know when you have exceeded 2 tons, and refuse to lift anything higher than 2 tons. Do you see the spring at the pressure release valve mechanism? That spring is calibrated to resist the equivalent of 2 tons. If you...

Try putting the smaller ball in first, and the larger ball on top. I think you probably took out the screw for the “working valve”.

You could use something such as a zip tie as a dipstick. Stick it through the fill hole, hit the inner cylinder and see how much you have. A few mm above the inner cylinder (when jack is lowered) and I’d call that good. When the jack is at its highest lift, the oil level should be above the...

Any chance you can share a pic of your jack’s hydraulic cylinder/block or its brand/model? a general rule of thumb is that when you’re peering into the reservoir through the small fill hole, you’ll see the inner cylinder. When the jack is completely lowered, the oil should be just...

the spring tension is probably be problematic now if you don’t already know what the setting is. You were supposed to count the number of turns to fully seat the top bolt down before removing it, so you know how tight it should be. Now you can only guess. do you know if this is a quick/rapid...

if those re the only parts that came out, most commonly: small ball on bottom, large ball on top. Needle valve on bottom (pointy side down), spring on top.

I found this for you: https://media.hcrcnow.com/uploads/drawings/Blackhawk_B67405_Service_Jack_4_Ton.pdf

When I look at the pictures of both kits, I think both will work, depending on your jack version. Perhaps give the vendors a call to make sure. There is probably a sticker/label on the side of the jack somewhere that has a serial number indicating the manufacture date that the vendor could...

I have the original 1/4” 2456 and the first fuel 3/8“ 2557. I prefer the 1/4“ because the 3/8” feels significantly heavier and also head heavy/unbalanced. if I’m not careful slowing down the rotation before the fastener tightens, the increased torque can almost pull the ratchet out of my hand...