Bent BH cylinder

[billfires]

I bent the bucket cylinder on my NH 758C BH today. Any suggestions on repair would be greatly appreciated. Thanks

Bill C

 

[hayden]

Ouch. How did you do that? Very impressive.

You'll need to replace the rod at a minimum, and perhaps the cylinder too if that got damaged. If you are careful and clean about the work you could replace it yourself, or take it to the dealer or a hydraulic shop for repair. Worst case you'll need to replace the whole assembly.

Peter

 

[kubmech]

Bill, I have had some success using a hyd. press. It's kind of a crap shoot wether it'll keep from leaking though. If you dissassemble the rod from the barrel, remove the piston and gland it helps the success rate. Chances are you're not going to get it perfect and you will experience some leakage in the future. To make the repair stick, replace the rod check the gland, piston and barrell for damage and install a new seal kit. Double check the price of a complete cyl. assembly to make sure that isn't more cost effective.

 

[JJT]

There are specialty shops that can straighten this out and rechrome the cylinder.

I know of a tracked excavator that hit a bridge and wrecked a boom cylinder. The repair was less than 10% of the replacement cost.

 

[Harv]

Wow! Sorry to see that, Bill. /w3tcompact/icons/tongue.gif

If it makes you feel any better (and it probably won't), <A target="_blank" HREF=http://www.tractorbynet.com/forumfiles/35-87150-JDhoe.jpg>this picture</A> posted a while back might make you count your blessings.

 

[Boondox]

Bill -- What were you doing when it happened? Let me know so I can avoid whatever it was!

Pete

 

[billfires]

Peter, I priced the complete cylinder assembly-$585.00. Tuesday I will price just the rod and packing kit as suggested by spencer200. A neighbor that is a heavy equipment operator gave me the names of 2 local hydraulic repair places also. Thanks for the info.

Bill C

 

[billfires]

kubmech, I want to repair it so it won't leak (has 110 hours) but will look into a hydraulic repair shop. It has been suggested that at the very least I will need a new piston and pscking kit. Thanks for the info.

Bill C

 

[billfires]

JTT, I will look into 2 hydraulic shops that are somewhat local. One has come highly recommended by a heavy eqiupment mechanic, who says they could rework that piston. I will also price new parts from NH. Thanks,

Bill C

 

[billfires]

Pete, I am not 4exactly sure how it happened. I was digging 2 14" oak stumps that were interconnected and had the first one out and was trying to break the tap root by undercutting the stump by digging over the top of the stump. If you look close at the pics in the photo forum you will see paint scraped off the outside of the "dipper" boom. I couln't seee the bucket and thought I had just pinched the hose. (I was also running the BH at 1500 rpms). Sorry I can't pinpoint the cause.

Bill C

 

[ns_in_tex]

I bent the power steering cylinder on a 105 HP Hesston about10/15 years ago. New one was outlandish price, so I went to a local machine shop & asked if they could make a new rod for me. He looked at it & said I think I can straighten it. He did. Still in use today.

 

[dourobob]

My friend and I are just beginning to build a Cadplans Backhoe - these photos sure are an indication of the power of Hydraulic Systems and should work to make us cautious around overdoing it with the new toy - er.. I mean tool /w3tcompact/icons/smile.gif. I'd be very interested in knowing what kind of success you have in getting this cylinder repaired - it sounds possible from some of the posts here and it is always comforting to know that things can be rectified before they go wrong.

Bob

 

[billfires]

Update, removed bucket cylinder and did a tear down. Not only did I bend the shaft but also broke the internal piston. We weren't able to tell if the cylinder tube was damaged but I'm not going to take chances with only 110 hours on the tractor. It appears that the damage occurred when the piston struck the stump. I will replace the entire cylinder assembly and chalk it up as one very expensive lesson.

Bill C

 

[billfires]

Pete, after removing the cylinder Mon. it looks like the piston bent when it hit the stump. I was pushing it instead of pulling but that's another story.

Bill C

 

[boustany]

For what its worth, I snapped the 'extendahoe' cylinder in my old Case 580C through my own stupidity. That cylinder is a major pain to remove and reinstall, and I think was the biggest (and most expensive) on the machine - a good 3 or 4" in diamter. I had it rebuilt - sort of - for the cost of $900 Canadian, which is around US $600 these days. I suspect any cylinder on a compact would be much cheaper. I say sort of, because the twit who rebulit it didn't bother to replace the packings (admittedly, I didn't specifically ask him to) and it still leaked a little after the replair but otherwise worked fine. Now I know a better shop.
I would first quote out a complete rebuild of the cylinder. It should be much cheaper and just as good as a new one.