Upsized Hydraulic Clyinders for Loaders

[kcender]

As a matter of interest I have noticed that the orientation of the lift cylinders on the L39 are opposite to the L45.I have noticed this difference on other machines but don't know if there is a specific reason why.One thing about the L45 orientation is it more easily allows for the installation of a safety lock for working on the tractor with the loader raised.I made one for my L45 as they don't come with one.The newer L47 comes with the safety lock.

 

[mike69440]

Hmmm, I never noticed the loader cylinders being oreintated end of end 180 deg on the L45. other than what you mentioned, I don't think it makes much difference
A loader Lock is a good idea. On the L39 the Loader Lock is just a lock on the Joystick.

Can you Post some Photo's and get me some dimensions?

PS

I want to stay metric sizing on these cylinders, as 5mm and 10mm jumps in size are a lot better than 1/4" and 1/2" increments. Typically Sizes run 32mm, 35mm, 40mm, 45mm, 50mm, 60mm, 70mm, 80mm, 100mm, etc.

Inch sizes run 1.5in (38.1mm), 2" (50.8mm), 2.5" (63.5mm) 3" (76.2mm) 3.5" (88.9mm), 4" (101.6mm), etc.

For instance jumping from 2"cylinder to a 2-1/2" cylinder is a jump of 56%. That is too much of a bump in capacity and results in the loader running really slow.

 

[kcender]

Here are some photos of the boom lock.The main part is made of 2 1/2 by 1/4 flat bar.The tolerances for this are quite tight and it took more time to make it than I anticipated.There is not a lot of room for error so that it doesn't bind throughout the full range of motion.If you want more info just let me know.

 

[mike69440]

Here are some photos of the boom lock.The main part is made of 2 1/2 by 1/4 flat bar.The tolerances for this are quite tight and it took more time to make it than I anticipated.There is not a lot of room for error so that it doesn't bind throughout the full range of motion.If you want more info just let me know.

I just have to ask:
Is your pretty L45 still that shiny? It looks like it has less than 1 hour on the meter and you just waxed it. I can vaguely remember when my L39 looked similar. Not so much now. The closest thing I have to a new tractor is my little red tractor. Note in one of my pictures a loader lock would have been the safe thing to do. You did a nice job. I know any project involving modifying a tractor often turns out more than expected. A least I'm not sticking a ladder in the bucket so I can cut tree limbs.
http://www.tractorbynet.com/forums/...387-weak-loader-curl-possible-solution-2.html

 

[rScotty]

Yes I agree however, I'm not using the Accumulator like you would in a large excavator., The one on the L39 has a 16 oz. working capacity just to reduce shock.
It's tucked away under the frame.

When the tractor was new I was robbing some gravel down the road, and while traveling back hit some potholes that caused such a pressure spike, ruined the quad seal rings on the main pump. It was covered under warrantee, as they may have not been installed correctly originally. I now drive slower and the tiny accumulator really helps.

I agree. The loader arms & pins, the hydraulics, and the tractor itself can probably stand a reasonable increase in cylinder size or pressure a lot easier than they can withstand the shock that comes from hitting a bump in the road at speed with a load in the bucket. An accumulator can help there, but slowing down works too.
Our construction JD 310 has the optional "easy ride" swith on the dashboard for transport with a full bucket. I haven't looked, but that option may be no more than a solenoid valve and an accumulator. Simply putting the solenoid valve in the fitting to the accumulator gives options for nearly no additonal cost or complexity. With the flip of a switch you can either have a time delay to spread out the shock - or not. Your choice.

Most large ag dealers can direct you to a local small shop that makes decent custom cylinders. They are pretty common in Ag country. Inexpensive and made to your specs. There's one within walking distance of the JD dealer right down the road.
luck, rScotty

 

[mike69440]

I have a price on 10 setes of loader lift and bucket cylinders custom made to fit the TL1000 Loader.
L39 Curl $400/Set of 2.
L39 Lift $440/Set of 2
Does not include shipping

I would suspect Kubota increased cylinder size even though increasing capacity would load up that fragile grand L front Axle, where the L45/L47 have up-rated axles. Unless the later L39 had their axles upgraded also?

Considering that Kubota prices for OEM Price for L39 Cylinders are:
Per Messicks
CYLINDER BOOM LIFT PN 7J800-63013 $661.89 ea.
Old style Curl CYLINDER BUCKET PN 7J800-64010 $575.56 ea.
New style Curl CYLINDER BUCKET PN 7J803-64010 $877.71 ea.
Per MB Tractor
The L45 TL-1000A2 & A@V & Cylinders are
CYLINDER,BOOM RH LIFT PN 7J803-63022 $944.95 ea.
CYLINDER,BOOM LH LIFT PN 7J803-63012 $944.95 ea.
Curl CYLINDER BUCKET PN 7J803-64010 7J803-64010 $873.35 ea.
So it appears that Kubota is selling the larger L45 Cylinder as a replacement for the L39 original cylinder. This is same size as I was quoted.

The Price I recieved is a good price. My problem is I do not need 10 sets

I have to assume that the new curl cylinder bore is 65mm vs the 60 MM OEM original.

 

[mike69440]

I have a price on 10 setes of loader lift and bucket cylinders custom made to fit the TL1000 Loader.
L39 Curl $400/Set of 2.
L39 Lift $440/Set of 2
Does not include shipping

I would suspect Kubota increased cylinder size even though increasing capacity would load up that fragile grand L front Axle, where the L45/L47 have up-rated axles. Unless the later L39 had their axles upgraded also?

Considering that Kubota prices for OEM Price for L39 Cylinders are:
Per Messicks
CYLINDER BOOM LIFT PN 7J800-63013 $661.89 ea.
Old style Curl CYLINDER BUCKET PN 7J800-64010 $575.56 ea.
New style Curl CYLINDER BUCKET PN 7J803-64010 $877.71 ea.
Per MB Tractor
The L45 TL-1000A2 & A@V & Cylinders are
CYLINDER,BOOM RH LIFT PN 7J803-63022 $944.95 ea.
CYLINDER,BOOM LH LIFT PN 7J803-63012 $944.95 ea.
Curl CYLINDER BUCKET PN 7J803-64010 7J803-64010 $873.35 ea.
So it appears that Kubota is selling the larger L45 Cylinder as a replacement for the L39 original cylinder. This is same size as I was quoted.

The Price I recieved is a good price. My problem is I do not need 10 sets

I have to assume that the new curl cylinder bore is 65mm vs the 60 MM OEM original.

The Price I received is a good price. My problem is I do not need 10 sets

I have to assume that the new curl cylinder bore is 65mm vs the 60 MM OEM original.[/QUOTE]

I am kind of surprised I have not had any takers.

In any case I would have to raise my Price,

For Upsized.
L39 Curl $525/Set of 2. (66 mm Bore) These would also fit a L45, however the L45 cylinders are already larger than the L39, so the gain on a L45 would be only 3%.
Still a fracton of the cost of a TL1000A Kubota replacement, should a replacement be needed.

L39 Lift $570/Set of 2. (60 mm Bore) (Note: Lift Cylinders are not a direct fit for the L45, as Kubota reversed their orientation on the L45's TL1000A vs. the L39's TL1000.

I had custom cylinders priced at local shops, $1200 & $1,800 respectively, so if I'm in this alone, I will import.

I have a way of upping the curl cylinders on my Mahindra that is not expensive. Wish I could say the same for the L39.

 

[rScotty]

Here are some photos of the boom lock.The main part is made of 2 1/2 by 1/4 flat bar.The tolerances for this are quite tight and it took more time to make it than I anticipated.There is not a lot of room for error so that it doesn't bind throughout the full range of motion.If you want more info just let me know.

Nice work, although I can't see from the photos how it pins into the "locked" position... Or is it held by compressive force?
rScotty

 

[kcender]

It is held by compressive force.Although it will work with the bucket on I take it off first.It weighs about 600 pounds so it would add a lot of force to the lock.I thought about drilling it and using the retaining pin to act as a safety,when in the up position, but didn't feel it was necessary.

 

[rScotty]

It is held by compressive force.Although it will work with the bucket on I take it off first.It weighs about 600 pounds so it would add a lot of force to the lock.I thought about drilling it and using the retaining pin to act as a safety,when in the up position, but didn't feel it was necessary.

If you ever want a more positive lock, there might just barely be enough room to drill both sides of the latch as shown. It makes a handy place for storing the pin when in the safety-locked mode.
rScotty