Need help identifying this jack

[Animalj]

I’ve had this jack for at least 10 yrs. It’s a beast, it will ****** my 78 k20 with bbc off the ground with ease. It stopped working and I’m wanting to rebuild it. Any help is greatly appreciated.

 

[Animalj]

 

[flippin]

Looks like a Lincoln Walker or oem variant. Is there an aluminum serial number plate riveted anywhere on the underside. HiBall would be the one to immediately identify it.

hcrcnow.com

great site for jack parts and tech drawings.

 

[Animalj]

No plates or stickers anywhere. The tan has a symbol stamped on it . Looks like a sideways lightening bolt in a circle, I’ve tried post a pic of it 2 times but for some reason it won’t.

 

[Animalj]

Finally got logo to post

 

[Animalj]

Ok found the jack it’s a 2.5 ton MAC, now to figure out who makes the ram.

 

[Animalj]

It’s model #JSA250MA

 

[flippin]

Manufactured by Shinn Fu America

https://www.hcrcnow.com/uploads/drawings/mactoolsjsa300mafloorjack3ton.pdf
https://www.hcrcnow.com/shop/seal-kits/product/3378

 

[Animalj]

I found all the specs and diagrams on the MAC pg. tried finding the whole ram ($125) they are obsolete, going to order seal rebuild kit($63).