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The jack is fantastic. It was made in Japan. This is a link to the drawing and seal kit. It was manufactured in the 80's or 90's. https://www.hcrcnow.com/shop/seal-kits/product/3012

If this is the spring you need, contact me.

This is a Hein Werner GH Version Jack. Link to drawing: https://www.hcrcnow.com/uploads/drawings/Hein-Werner_GH-1_Hydraulic_Jack.pdf

This jack is maybe the same as the Astro 1000T or Jet TJ1760. The drawing links are included. (THESE ARE NOT CORRECT) Some of these style jacks were manufactured in Brazil, Taiwan and Japan. https://www.hcrcnow.com/uploads/drawings/astro1000ttransmissionjack2200lb.pdf...

Walker 93655 Link to drawing: https://www.hcrcnow.com/uploads/drawings/walker_936551.pdf

Hello, remove the tiny ball under the release valve. The release does not use a ball. The point is the valve.

This is a link to a bit of information on adjusting the quick lift side. https://www.hcrcnow.com/images/faqs/QuickLiftValveOperation.pdf

Hello, it is not necessary to remove the cylinder from the valve block. There is nothing in there to work on. Only remove the cylinder if it needs work you are not able to do while together. Really can not see the issue near the bottom.

Not a recommendation. This is just what we find that works very good. Dries in 30 minutes. Just use a fingerprint on both surfaces and work fast. 3M 08008 https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Black-Super-Weatherstrip-Adhesive/?N=5002385+3292908126&rt=rud

Post a few pictures of each.

The best way to get the correct parts is letting us know the manufacture and model number. We have a few.

Let me know which style you have then I will be able to let you know. The jack is made in Japan. 1970’s 1980’s. If you can bring it back to life,you will have a very good jack.

This is a link to the drawing for this jack. It is made in Japan and a very good jack. Seal kit is still available. https://www.hcrcnow.com/uploads/drawings/jcpenney_2015paragraphlarge.pdf Sent from my iPad using Tapatalk

This is a Hein Werner WS. Seal kits are available and a few other parts.

The hex nut is the filler plug. Sent from my iPad using Tapatalk

Your jack will bleed just like all other jacks. I have included a copy of a webpage. If your jack is acting 'spongey' the major reason generally is that you have a BAD SEAL that is sucking air into the system or else your kids (or some bugwit neighbor) played around with it and tried jacking...

Post pics of the seals.

The Walker 770 seal kit has been discontinued for a very long time. You can remove the seals and try to source the seals individually.

Alltrade jacks are imported. The seals in them are metric. You probably have a 19mm pump piston. If you can not find them local, we offer a set, Oring and backup. This is a link. These may not work on your jack. These are for Allied. https://www.hcrcnow.com/shop/seal-kits/allied/13650

The D7601 is the casting number for the hydraulic power unit. It could be a few different jacks. All with the same power unit. Link https://www.hcrcnow.com/shop/seal-kits/u-s-jack-ausco/3349