My press has developed a stutter or stall???

J. Neilson

J. Neilson

Joined
Feb 6, 2001
Messages
3,621
In the course of the big move to the new shop, I of course, had to move my press. Funny thing is though, I moved it on a flat bed and it stayed upright and full of fluid the whole trip. When I added a new plug and started her up today, she was stalling like a car with no juice. I topped off the fluid and let her run for awhile but, no change. The 5 hp motor or the pump or whatever just doesn't seem to have very much power, even though nothing is loose, cracked or was even roughly jostled on the trip over. Any ideas?
 
I'd check the power at the wall first since that is the first place of 'change' and then work from there. check the voltage with a multimeter and check that the wiring is sufficient for the circuit. I've seen quite a few 220v outlets wired with way too small gague wire, and if the run is long from the breaker box, that can cause a significant drop in power under load.
 
Electrical first as suggested. Heck, one leg could be dead, or something like that. If using a 3 phase motor, check the drive/converter.

Next check mechanical things like belts, linkages, blocked ram slides ( you did take out the shipping brace?), etc.

Also check that the relief valve isn't messed up. It could be opening up and not allowing the pressure to go to the ram. If you have pressure gauges on your press, that might give you an idea what is happening.

Last thing, drain and re-fill the system and check for an air bubble somewhere.
 
Does your tank have a magnet..? If so, it may have become dislodged in transport,
and allowed some previously held steel particles to clog the strainer...?

Will the upper die assembly move freely with the ram detached..?
 
Last edited:
Greetings,
Your system should function after a couple minutes running if you got some air in there. Do you have any psi gauges in your system? I would check the current draw on your motor first. Let it run without moving the cylinder for a couple minutes, is it getting warm. Hydraulics is hot if you can not hold your hand on the pump or motor for 5 sec. If you can not it is to hot. Just moving the cylinder up and down, does it move at the same rate as before? Do you have any flow control in your system that may of been bumped and moved to restrict flow? If you do, take it out and flush it out. You may of got something in the needle. If you still have issues I need your motor HP, and model of your pump.

Dennis
 
Thanks guys. The electric seems fine and the cylinder/ram moved just like before but, the whole machine sounds a bit "quieter" (thought I'd be happy about that) and it seems to stall out once it's actually exerting pressure. I'll drain the system tomorrow and see if I can bleed out any air or find any blockages.
 
You must log in or register to reply here.
Back
Top