Bent bucket cylinder rod on BH75......Need Help

   / Bent bucket cylinder rod on BH75......Need Help #1  

GSP9

New member
Joined
Mar 14, 2006
Messages
16
Location
Central PA
Tractor
L3400
The other day I was trying to dig out a small stump when after a few minutes I noticed a slight squeak coming from near the bucket. I jumped off and noticed what looked like a very slight bend to the bucket cylinder rod. After inspecting, I noticed that the rod was extremely hot and also had a slight burning smell to it. After I realized my night was done, I waited a few minutes and tried all other functions of the backhoe and at one point noticed that the stabilizer jacks would go down but would not lift the rear wheels off the ground. And most other functions would not do anything once pressure was applied to them. After a few minutes, all functions returned to normal. I had this happen a few years ago and the dealer assumed either some dirt or air was working thru the unit. It lasted for a few days, cleared up and never reappeared until after I bent the rod the other night. I'm not sure if the two items are related but it just seems odd that they happened a few minutes apart the other night. FWIW, the hydraulic oil was replaced about 10 hours ago with SUDT and the level was where it should be. A few questions:

1. Is the rod capable of being bent straight again by a hydraulic shop or am I better off just paying the $280 and getting a new one?

2. The unit isn't leaking any fluid so would I need to spend the $125 for the seal kit or can I just use the seals that are in it now? $125 just seems like a lot of money for a seal kit but I've never opened one up before to know how uncommon the seals are.

3. If I do end up replacing or taking out the rod to be straightened, how difficult a job is this? I would consider myself a pretty handy guy but I have never tackled anything along the lines of hydraulics except for replacing a hydraulic line or two. I do all my own maintenance and have remodeled a house, restored an old car, etc.....but like I said I just never tackled something hydraulic like this.

4. If I do end up doing this myself, are there any special tools that would be needed or has anyone ever done the same thing and can offer some insight into how it was done?

5. Any ideas on what caused this? The stump was just a small birch tree, maybe 10" in diameter at the stump and was fairly easy to get out. I would say the engine was running around 2,000 rpm so I certainly wouldn't say I was pushing the tractor too hard. I used the search function but was unable to come up with any similar situations. Any help would be greatly appreciated. Thanks.
 

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   / Bent bucket cylinder rod on BH75......Need Help #2  
There are a few posts on here about this,I had the same problem with the BH90 backhoe I used to have.It is not overly complicated to fix.One guy,I think,had his straightened while I ended up having a new rod made for mine.The price for the rod and seal kit from Kubota was very high.I went to a hydraulic shop which is what my dealer recommended.Instead of a whole seal kit I only bought the seals I needed for around 12 dollars.They could have made the rod but I purchased the stock and had a new rod machined as I know a machinist at work.We reused the piece on the end and I welded it on.Unless you can get machining done cheap the best,and cheapest,way is to get the hydraulic shop to make a new rod.Straightening the rod will probably be cheaper but that is up to you.Taking the cylinder apart is not complicated but a bit messy.I found it easier to take the cylinder off the backhoe but you should loosen the end cap first.There is a wrench for this but I used a pipe wrench.Hope this helps.
 
   / Bent bucket cylinder rod on BH75......Need Help #3  
Did you try to move the tractor with the backhoe in the ground or hooked on a stump?? My friend did that with hid and it bent....:confused2:
 
   / Bent bucket cylinder rod on BH75......Need Help #4  
<snip> I used the search function but was unable to come up with any similar situations. Any help would be greatly appreciated. Thanks.
Try google
Bent bucket cylinder rod site:tractorbynet.com
Bent hydraulic cylinder rod - Compact Tractors
www.tractorbynet.com/.../hydraulics/212747-bent-hydraulic-cylinder-ro...‎
Jul 6, 2011 - 10 posts - 8 authors
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I have managed to bend the two cylinders on my 70HP Kubota for the front bucket curl control. Dealer wants $650 for each cylinder or $250 for ...
Bent bucket cylinder rod on BH75......Need Help - Compact Tractors
www.tractorbynet.com/.../281571-bent-bucket-cylinder-rod-bh75.html‎
6 hours ago The other day I was trying to dig out a small stump when after a few minutes I noticed a slight squeak coming from near the bucket. I jumped off ...
bent hydraulic cylinder??? - Compact Tractors
TractorByNet.com | Compact Tractors | John Deere, Kubota, New Holland Forum General Forums Hydraulics‎
Jun 30, 2010 - 15 posts - 7 authors
The cylinder is a 1.75"x24" stroke cylinder. The piston rod is 1" in dia and the bend is so slight the pictures I took do not show it. I laid a metal ...
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www.tractorbynet.com/.../133014-375-backhoe-bent-bucket-cylinder.ht...‎
Nov 27, 2008 - 16 posts - 8 authors
Stumping a small tree with a crotch in it. Guess I somehow crowded and bent my bucket cylinder rod. Bent pretty good, too much to straighten.
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www.tractorbynet.com/.../259521-hydraulic-cylinder-rod-reconditioning...‎
Oct 3, 2012 - 11 posts - 6 authors
My local hydraulic repair shop just refurbed both of my bucket cylinders. Didn't have any piston/rod problems, but one of the cylinder bores was ...

good luck
 
   / Bent bucket cylinder rod on BH75......Need Help #5  
I've straightened a bent rod before, after disassembling the cylinder you locate the "high spot" and push it down with a press while supporting the rod on both sides of the bend. It's not hard to do, but takes some patience and some time. For $125 you can probably get an aftermarket replacement cylinder from a hydraulic shop.

From the picture I'd say that was done by pressing against something with the bottom of the bucket, like lifting the tractor with the hoe to move it sideways. It's a compressive force to cause it, to be sure. That or you backed into something with the cylinder extended, although it doesn't look like an impact bend.

Sean
 
   / Bent bucket cylinder rod on BH75......Need Help #6  
The big factor here is the surface condition of the rod. If there are no scratches on the rod the seals may still be ok. They will usually accommodate slight angular misalignment like that without damage. I'd inspect the rod very closely for any marks, scratches or other evidence of contact. If there is none, I would try straightening a gentle bow like that with the rod and cylinder in place. A way to do this is to remove the bottom pin, rotate the rod 180 so it bows out instead of in. Then put the pin back in, place a wooden block between the dipper and the gland end of the cylinder, and rig up a clamp (with protective face at the rod) to force it back to straight, or just a hair beyond. Need to be very careful not to scratch the rod.

If the rod has surface damage the seals are likely damaged too and it may have to come apart for repair. Sometimes minor scratches can be peened, filed smooth, and filled with super glue (yes) and the seals survive just fine. BTDT as they say. Good luck - Dick B
 

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