Bent hydraulic rod

I had mine replaced with a new piston made of Aluminum as cast iron one chipped . Total bill was under $200 for the  work, with additional cost of around $75 for new seals , I did find Minnpar was cheaper for new end gland for cylinder than having one made as they had all parts in stock .  cutting off the end eye and turning and threading stock to fit piston is nowhere near $800 job.  

I bent the dump cylinder rods on my HD6G twice. The complete rebuild cost $700 per cylinder. That was 3 years ago.

you need to find a different shop

We have straightened rods before when a guy was in a hurry. You need to do it a little at a time using a porta power and a heavy table with tee slots for hold downs, a couple Vee blocks and an indicator.
 I made the new rod for the "Build a B" project and the chrome rod was like $20. You have 4 times the length and bigger diameter ??????? Then it took me a couple 3 hours to disassemble the old rod, take measurements and turn and thread the new rod and assemble with new packing. Packing was the cheap part at about $8
 The shop would have charged more for the rod if selling to a customer and labor at that time was over $100 an hour for machine work.
 Go here and buy a replacement cylinder_____ http://www.surpluscenter.com/Hydraulics/


Edited by CTuckerNWIL - 25 Jun 2016 at 7:07pm

I've straightened several rods successfully. Just do a little at a time to allow the metal to relax. You want to make sure that it can't fly out of your fixture, or it might wrap around your head.

Minnpar reports that replacement cylinder rods have been discontinued.
I will keep looking.
K

Ac backhoes are notorious for doing this, when you raise the loader with the bucket all the way forward the loader overpowers the tilt cylinder. With the valve in the neutral position, causes the rods to bend. Loader overpowers the cylenders. If the cylenders are not leaking you can straighten them on the machine. Using a portipower, a hard wooden block, you can straighten them back up. They do not have to be absoulutly perfect to work. In the future when you raise the loader open the tilt cylinders so the bypass valves work. You would call it boom up, bucket curl. Rods are easy to replace it's cutting the threads and wielding the eyes on. We have two of these and have done this 3 times, people who do not know how to open the valves or operate the tractor add to it. It's just one of the quirks of these machines. We have had the backhoes since 75'

a buddy bent one on his loader once, we tried to straighten it in a press, spent about 2 hours and really got lucky, he's still using it, and that was about 20 years ago. had to be careful not to mar it, and we used  wood blocks.

We re packed the seals and turned the rod 180 and will see how long it will last.
Hydraulic guys mentioned that it was a pretty small shaft for that long of throw.
I will watch for larger cylinders for replacements.

I had the shaft on the backhoe extend section bent like a banana and took it to hyd. shop. they put it in a press and slowly began to straighten it. sometimes they will break doing this. mine worked fine. still using it year later no problems.

It had about a 1/4 inch of deflection when I laid it on the hydraulic shops table.
New rod was quoted at $500 plus shop time to thread and weld eye.
It matches the other side so probably fine for now.
I need to do lower hydraulic cylinders this month and then kingpins.
Anyone know if minnpar sells kingpin kits?