Hi HiBall,
The release is definitely a cone/needle valve. The extra ball however was never placed into the release valve cavity so I am positive the valve seat wasn't damaged by the ball.
It's a bit difficult to describe and I didn't take a picture but I actually found the ball in the cavity...
Hi Hiball,
The release valve has a conical tip which one reason I couldn't figure what the tiny ball i found both in the unit and in the diagram was for. Maybe the ball I put back in there is not really needed and its obstructing the release of oil.
I didn't mic the u-cup but visually it...
Hi HiBall,
Your post got me motivated to rebuild my Craftsman 3.5 ton professional jack. I used the seal kit from an Omega MagicLift 25030 (http://www.shinnfuamerica.com/ProductDetails/Omega_Lift_Equipment/Magic_Lift_Service_Jacks/25030/360) because the power unit cross referenced to be the...