Liberty L Series Progressing Cavity Pump Disassembly Part 7

Today we are taking a look at a Liberty Process L Series Progressive cavity pump. Our mechanic adjusts the bearing housing in the press so that the bearings are clear to fall through the plates that the housing is standing on. The drive shaft assembly is then pressed out of the bearing housing. The packing gland and pin collar are removed from the housing as well. Because of the damage to the driveshaft, there is no reason to press the bearings off of the shaft as everything is going to be replaced with new parts anyway. After wiping away some grease we can see where the shaft snapped clean off. Our mechanic describes the break as high in the middle, then a dish, finally it comes back up along the edge. He then makes a joke about welding the shaft back together.
For more information on Liberty Process pumps, parts, repairs, and custom pump packages including drive motors, please feel free to contact us at www.libertypro...
For over 25 years, Liberty Process Equipment has been the leader in the field of economically priced Progressive Cavity Pumps and Progressive Cavity Pump replacement parts in North America.
#pumpmechanic #pumpassembly #assembly #pumpdisassembly

[@waynep343]

The undercut for the threads created a stress point that weakened the shaft. Might be a case for having the threads rolled instead of single point cut.

[@jaredkennedy6576]

I really wish I could go back to doing this sort of work, but I just can't afford to.

[@nyetu]

What?

[@jaredkennedy6576]

@nyetu mechanical assembly doesn't pay anywhere near what I make, but it's fun

[@libertyprocessequipment9885]

You'd be surprised. Many companies really need people with know-how. It never hurts to ask if this is what you really enjoy doing! Good people with talent and passion for a job are hard to find today.

[@jaredkennedy6576]

@@libertyprocessequipment9885 I mean, if you know someone who pays $46/hr plus full paid medical then I'm on board.

[@PRenard2012]

How do you weld it in the perfect CENTER

[@keith4430]

That's the neat part...
You don't.

[@Bobr1997]

lathe

[@Slyd_Fox]

Ideally, the two rods to be joined are ground to a cone shape and you build the weld out from the center to the outside. How you finish the outside of the shaft depends on if anything needs to sit on/slide past the weld.
All that said, it tends to be better to just use a solid piece of stock rather than join two together, if you have a choice.