Kubota L4400 Bent Front End Loader Dump Cylinder UHOH

[dex3361]

Well I have done it now I was using the grapple to extricate small stumps and caught the rake as I was backing up and bent the Dump cylinder on the right side. I got online and have been searching for replacement cylinders and it seem as though they are and odd size. The tractor is a Kubota L4400HST with a LA703 loader. The cylinder is 2" bore with a 18.125" stroke.
It is 26 5/8" retracted. It has 1" pins. I looked at Baileys and Surplus Center and could not find an exact replacement. I am going to drop the cylinder of to see if it can be repaired. Kubota wants in the $600 for 1 cylinder. Must be made out of gold. Any input would be appreciated.:anyone:

 

[mrmikey]

At that price you'd probably be better off replacing both cylinders with an aftermarket something close in size.
It pi$$es me off when I see dealers, not just tractors, everything charging an outrageous price for oe parts. Another example, an air filter for my 1500 Kawi. 1500 $65. Sorry, rant mode off ..Mike

 

[SLHawkins]

Check to see if there is a hydraulic shop near you and have the cylinder rebuilt. My experience has been that locating after market cylinders has been challenging. Although, you might want to look at some of the internet suppliers such as coleman equipment (Coleman Equipment - Case, Kubota, Stihl - Sales, Rental, Parts & Service). Or, a manufacturer that specializes in cylinders (Hydraulic Cylinders).

Hawk

 

[LD1]

Buy two of these and be done

Hydraulic Cylinders 116-722 Detailed Information

It is a tad longer stroke, but if your bucket is like mine, it has mechanical stops to prevent overtravel anyway. So a little longer wont hurt anything.

But you will want to double check fitting size, you may need adapters. And also check the width of the pin crosstube and see if they are the same as well.

 

[dex3361]

Thanks guys I will check out the sites this evening. I am going to take it to a hydraulic shop to see what they say.

 

[Chilly807]

At that price you'd probably be better off replacing both cylinders with an aftermarket something close in size.
It pi$$es me off when I see dealers, not just tractors, everything charging an outrageous price for oe parts. Another example, an air filter for my 1500 Kawi. 1500 $65. Sorry, rant mode off ..Mike

I'd have to agree with Mike. There's a reason the cylinders are an odd size, and it has nothing to do with saving the customer money when he damages one.

Sean

 

[wdchyd]

Dex,

Do yourself a favor and remove the cyl, pull hyd rod all the way out.....then move rod back and forth to see if gland is egged out......you may have to do this to the other good side to give you an idea of how much wiggle is normal...

if the gland is egged then you'll need more than just a rod......if the cyl tube is stretched out where the gland screws in, then start pricing out new cyl (s)

if it just needs a rod and seal kit you may find out it won't be as expensive as you think, replacing both with generic cyls is cost effective but don't forget there may be some retrofitting the pin sizes and hose fittings/adapters to add to the cost....

 

[dex3361]

Not looking good I took the cylinder off and inspected the end where gland screws in it broke and it looks like it egged shaped the end and threads. I located a hydraulic shop and I am going to drop by tomorrow and see what he says. The rod is 1.180" and a 1.25" would be stronger but would lower the break out strength. I guess I will see what the local expert says but I fear that the TBN experts as usual are right.

 

[Kernopelli]

Not looking good I took the cylinder off and inspected the end where gland screws in it broke and it looks like it egged shaped the end and threads. I located a hydraulic shop and I am going to drop by tomorrow and see what he says. The rod is 1.180" and a 1.25" would be stronger but would lower the break out strength. I guess I will see what the local expert says but I fear that the TBN experts as usual are right.

At 2000 psi that rod size difference creates a 267 lbs difference in force (about 6.5%)....probably wouldn't worry about it for the added strength.

 

[wdchyd]

At 2000 psi that rod size difference creates a 267 lbs difference in force (about 6.5%)....probably wouldn't worry about it for the added strength.

The only thing I'd worry about changing rod dia from 30mm to 1.250 would be the one cyl will be carrying more load (6.5%) when retracting (holding bucket full of material)......would this stress the FEL frame..??....Maybe/Maybe not..??

If a rod dia is changed then you'd be wise to do both...