Quote Originally Posted by hemmjo View Post
Tony,

Thank you for the response. I have acquired a 25 ton press frame. Minus the hydraulics. I remembered reading your initial post about inverting a jack.
Inverting an hydraulic jack for a workshop press.

I have a 20 ton bottle jack. I have it apart preparing to install the pump inlet extension. I had intended to make a fitting to press into the inlet hole. The inlet in my jack seems small( 0.160"/ 4mm) Seems if I make a fitting to insert into that, the oil passage will be very small.

I was thinking of enlarging that hole, But I am concerned about getting chips in places I cannot get clean. in order to get one of the check balls out, have to remove the copper washer that seals the pump, but will have to make a new one. I also do not see how to remove the check ball in the bottom of the cylinder.

From the image in your post, your pump inlet looks larger than mine. Perhaps the size is my imagination.

Your thoughts are appreciated,

John
1/8" BSP I think. Have you seen my second post on this topic More on improvements to bottle jack shop press.