Bump up lift capacity of L3400/LA463 Loader

[J_J]

The only relief valve I see is on the bottom of the hyd block and takes shims.

Your pump flow is 9.4 GPM, so run the engine at max and check pressure.

You should stay about at least about 50 to 100 psi below the pumps max rated pressure.




31351-37950 100 SHIM 0.4mm
31351-37960 100 SHIM 0.2mm
31351-37970 100 SHIM 0.1mm

 

[FTG-05]

how about this

3000 PSI 2.5" LF LM GAUGE

3/8 X 1/4 NPTF COUPLER


3/8" X 12" 3/8 NPTM X 3/8 NPTM 3000 PSI HYD HOSE

and what ever quick coupler male end you need for your Kubota that takes a 3/8 NPT male end. or an adapter if needed. But the whole thing should be a lot less than $50.

Kens bolt on hooks sells a nice gauge and has a nice video on YouTube on how to do it. He is also

Between the gauge at Surplus center and the M/F adapters at Kens, this has now become a lot cheaper than the McMaster route. Thanks!

I have a tee on mine and leave it on the lift circuit. You get a good idea how much you are lifting that way.

I'll send you a PM... What part of TN? Just got back from driving from Chattanooga through Knoxville and up I-81 into VA.


Remove a FEL hose and replace it with gauge, push lever. View attachment 405093

That was me, I only added 150# and it was an accident, laying upside down, I turned the wrench in the wrong direction. It moved pretty easy so I checked the pressure again and it was close enough.

Thanks for the offer. Due to a much lower cost than I originally thought, plus LD1's idea of leaving it in place, I think that's what I'm going to do. After I get done with an Eagle project today, I'll be ordering the parts this afternoon.

Thanks!!!

 

[ritschner]

FYI, depending on the dealer that does the setup, check the relief valve for tightness after installing the gauge. The reason you get two different answers on whether to use shims or just adjust the relief valve is that some dealers will over-shim the relief valve and set the pressure by turning the relief valve in until desired pressure is achieved. Mine was done that way and when I shimmed mine originally and bottomed the valve I ended up with 3300psi(spec on mine is 2347psi). I actually had to remove two of the shims that were installed and bottom the valve to end up with 2700psi.

 

[FTG-05]

FYI, depending on the dealer that does the setup, check the relief valve for tightness after installing the gauge. The reason you get two different answers on whether to use shims or just adjust the relief valve is that some dealers will over-shim the relief valve and set the pressure by turning the relief valve in until desired pressure is achieved. Mine was done that way and when I shimmed mine originally and bottomed the valve I ended up with 3300psi(spec on mine is 2347psi). I actually had to remove two of the shims that were installed and bottom the valve to end up with 2700psi.

Ok, that explains the difference. Let's hope mine is the latter so I don't have to mess with shims and taking the relief valve apart. I'm going to try to get to 2700 as my target psi.

Still gotta order the parts, tomorrow, too tired from an Eagle project!

 

[rswyan]

Just did the PRV on the loader valve on my B2910 (LA 402 loader ) ...

Was reading about 100 psi low (1900-ish) ... added two 0.4 mm shims to the existing shim in the PRV ... took it up to 2200 psi.

Next on the list is to check the PRV for the 3PH, then the one on the rear remotes.

 

[FTG-05]

Been following this thread closely I've been wanting to check my L3400/LA463 loader with meter as described by lots of TBN members here. I don't have any problems or complaints with my tractor but was gonna shimmy it some according to specs if need be.
Problem I bought new liquid filled meter from Northern and new hydro/male/female couplins from TSC.I hooked it all up(tapped in) and I 'am getting a zero reading. I'am posting this before I get back to tractor and check to see if hydro fluid running through fittings(gonna have to take apart) and my other thought was bad meter or hole in bottom of meter somehow obstructed. I've cranked tractor up revved up some played with fel joy stick and nothing "NO READING" on meter.Like I previousely stated all new stuff not that something could have come defective. I even turned dial under seat both ways and no reading. Any other thoughts in meantime ? I'am I doing something wrong/misread something.
Big Thanks in advance I've been playing cowboy 40 something miles up road and have everthing hooked up wanting/waiting to check what I mentioned. :confused3:

Boone

Ok, another question: Looking at the first pic above, can anyone tell me which port does what? Especially the one that is closest to the FEL lock (blue cap is partially blocking).

That is the port I'd like to install my gauge on and then just leave it as LD1 suggested earlier. I have my MS 362 CM chainsaw holder attached to the FEL support column and want to clear it so I can see the gauge as I use the FEL. It would be great if that port was the one that lifts or curls the bucket up.

Thanks,

 

[J_J]

Install the hyd gage hose in a tee in the IN port of the first valve.

Then connect the gage where you can see it for troubleshooting or whatever.

 

[J_J]

I have a tee on mine and leave it on the lift circuit. You get a good idea how much you are lifting that way.

What you say is true, but.

Curious why you did not install the gage in the IN port.

With gage installed in the IN port, it will indicate any pressure develops by your hyd. FEL, remotes, 3pt.

 

[k0ua]

Ok, another question: Looking at the first pic above, can anyone tell me which port does what? Especially the one that is closest to the FEL lock (blue cap is partially blocking).

That is the port I'd like to install my gauge on and then just leave it as LD1 suggested earlier. I have my MS 362 CM chainsaw holder attached to the FEL support column and want to clear it so I can see the gauge as I use the FEL. It would be great if that port was the one that lifts or curls the bucket up.

Thanks,

The hose or port with the orange tape is the feed from the pump on a Kubota. The green port/hose tape marking is the Power beyond, and the gray port/tape is the tank connection. Put a T in the orange pump feed to the loader valve and install your gauge. This will be ahead of the loader valve.

 

[rturner98]

Hi All,

Just stumbled onto this thread and ordered the gauge, QD and bushing from McMaster Carr. Plan to check my L3800 and hope to be able to boost the lifting capability a little. I also have a JD 2305 and was a little disappointed the 3800 couldn't lift more than it can - granted, it's more than the 2305 but still...

Regards,

Mark

Did you check your L3800? I am thinking about doing this to my tractor and was wandering if the pressure relief is set conservative.

Has anyone checked on the L3800?

Rick