Recent content by Billybdakota

Oh. The piston I referred to is a single component which presumably replaced the cap and spacer in the diagrams. My unit just has a piston (cap with slot head and about an inch and a half long smooth section that butts up against the spring.

Full credit to Paulsomlo and Hiball. You were correct that the problem resided in the hydraulic circuits. Bonus points to Hiball who nailed it as an extra little ball in the speed circuit! I had dumped the contents of the power circuit carefully but when I loosened the cap on the speed circuit...

I started out with a working Jack. It was leaking badly. I ordered the full rebuild kit and replaced the main cylinder seals. When I put the Jack handle on, I put the disc on the wrong side of the bypass lever so the lift arm didn’t drop when I turned the handle cap. It dropped overnight however...

Well, I emptied the Power chamber again and Lo and Behold, there was a second small ball bearing stuck at the bottom of the chamber. When I removed it and placed the correct components back into the Power chamber (small ball, bigger ball, spring and piston) the Jack pumped up! But, back to the...

I emptied the chamber for the Speed Circuit and it contained the piston, gasket and two springs and two balls as shown in the drawing. I carefully replaced them and tried the handle - same as before. It pumped up but when I brought the handle back the lift arm fell down. I then removed the...

Thank-you all for the helpful replies. Paulsomlo may have hit the problem on the nose as the drawing showed different parts than what came out of the two chambers I rebuilt (I didn’t want to muck with the bypass chamber). The speed chamber did not have a small ball bearing as shown on the...

I am rebuilding my old Blackhawk SJ3 and have replaced all the seals, etc. . It now seems to pump OK but the lift arm falls back when I bring the handle back to the start position. Obviously something is wrong but before I start tearing things back down, I’d like to know if there is an obvious...

I am in the process of rebuilding my Blackhawk SJ3 and have a question. The release mechanism seems to consist of a cam operated by the handle, which moves a lever on the top of the power unit. The end of the lever that engages with the cam is triangular and when it moves it shifts another...