charlesgilson
New member
- Jul 26, 2019
- 1
I have an extremely old Wabash 30 ton hydraulic press (Model 15-2-TRM) that was working well until a few days ago. The press has a single stage motor that supplies fluid to a single 4'' ram from the bottom and a smaller 1.5'' ram from the top.
The press will now only generate 12 tons of pressure from the bottom when the platens are under load (shims or a mold in the press). When the platens are not under load and are fully extended (take the mold out of the press and close it leaving a few inches of void space between platens), I am able to generate the full 30 tons of pressure. The top ram seems to be working fine and generates lots of pressure. I changed out the pump, both directional control valves, the flow reduction valve and the pressure reduction valve----essentially everything mechanical on the back of the unit. The problem still persists. Oil has been changed---currently using 46 weight hydraulic oil. I do not see any leaks around the ram seal. Thought that there might be air in the system, so I bled that out several times----seems to be clean now. The local hydraulic guy is on vacation, so I am left to my own devices to get this thing working.....Anybody have any thoughts? I certainly would appreciate some input. Thanks!
The press will now only generate 12 tons of pressure from the bottom when the platens are under load (shims or a mold in the press). When the platens are not under load and are fully extended (take the mold out of the press and close it leaving a few inches of void space between platens), I am able to generate the full 30 tons of pressure. The top ram seems to be working fine and generates lots of pressure. I changed out the pump, both directional control valves, the flow reduction valve and the pressure reduction valve----essentially everything mechanical on the back of the unit. The problem still persists. Oil has been changed---currently using 46 weight hydraulic oil. I do not see any leaks around the ram seal. Thought that there might be air in the system, so I bled that out several times----seems to be clean now. The local hydraulic guy is on vacation, so I am left to my own devices to get this thing working.....Anybody have any thoughts? I certainly would appreciate some input. Thanks!
