LX3310 Power Beyond Banjo Sizes???

Old Machinist

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Anybody know the sizes of the two banjo connections for the power beyond tube on a LX3310?

I am planning a home brew third function and I need to figure out adaptor sizes for those connections. Push come to shove I will pull the tube and measure but if someone already has the info that would save me a step.
 

TheOldHokie

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Anybody know the sizes of the two banjo connections for the power beyond tube on a LX3310?

I am planning a home brew third function and I need to figure out adaptor sizes for those connections. Push come to shove I will pull the tube and measure but if someone already has the info that would save me a step.
I dont know for a fact but those banjo bokts are also used in B and BX tractors and in a recent thread the valve PB port was identified as SAE-08 and tractor case as BSPP (G3/8 ??)

Dan
 
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Old Machinist

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Kubota LX3310 cab, JD 4310, NH 575E cab backhoe, JD F725, Swisher 60", etc.
May 27, 2024
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NE FL
Not sure on the Kub's, but on the JD's the banjo bolts can be replaced with a -08 ORB adapter fitting. 3/8 BSPP is an obvious choice too as Dan wrote.
I don't think he is saying those two sizes are interchangeable. What I read it to say is the PB port is -08 ORB and the return connection on top of the transmission case is BSP 3/8.

The diameter difference between the two is about 3mm and the pitch is 3 TPI difference also.



Those two fittings are the key element in making a DIY third function. I have looked at the manuals and Kubota parts to see if those are available separate and can't find them. The Land Pride 3rd function manual shows them and has part numbers but the numbers come up as not available.

You would think they would show up on Kubota parts but if they do I am overlooking them. Kubota would probably want as much as a aftermarket kit for the fittings anyway.

Land Pride, WR Long, and Summit are sourcing them somewhere.
 
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TheOldHokie

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I don't think he is saying those two sizes are interchangeable. What I read it to say is the PB port is -08 ORB and the return connection on top of the transmission case is BSP 3/8.

The diameter difference between the two is about 3mm and the pitch is 3 TPI difference also.



Those two fittings are the key element in making a DIY third function. I have looked at the manuals and Kubota parts to see if those are available separate and can't find them. The Land Pride 3rd function manual shows them and has part numbers but the numbers come up as not available.

You would think they would show up on Kubota parts but if they do I am overlooking them. Kubota would probably want as much as a aftermarket kit for the fittings anyway.

Land Pride, WR Long, and Summit are sourcing them somewhere.
You understood my meaning. Its not rocket science or expensive. Assuming your tractor is the same as the BX in the old thread:

The PB port on the loader valve gets a $3 straight SAE to male JIC adapter and a 90 degree JIC swivel end on the hose.

1000003356.jpg




The port on the transmission case gets a BSPP to male JIC banjo and you reuse the OEM bolt.

1000003357.jpg

Dan
 

Old Machinist

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Kubota LX3310 cab, JD 4310, NH 575E cab backhoe, JD F725, Swisher 60", etc.
May 27, 2024
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You understood my meaning. Its not rocket science or expensive. Assuming your tractor is the same as the BX in the old thread:

The PB port on the loader valve gets a $3 straight SAE to male JIC adapter and a 90 degree JIC swivel end on the hose.

View attachment 163686



The port on the transmission case gets a BSPP to male JIC banjo and you reuse the OEM bolt.

View attachment 163687
Dan
You wouldn't happen to have links to a source for both would you?
 

TheOldHokie

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You wouldn't happen to have links to a source for both would you?
They are standard fittings available from most supply houses.


 
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Old Machinist

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Kubota LX3310 cab, JD 4310, NH 575E cab backhoe, JD F725, Swisher 60", etc.
May 27, 2024
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NE FL
The links I provided are for a source of supply. You need to verify the exact fitting sizes you need before ordering.

Dan
I asked TTWT if the Kubota third function lines on his LX3310 were 3/8" or 1/2" and he said both the supply and return were 1/2".

When I searched the intraweb for hydraulic flow rates on 3/8" lines the answer came up over 20GPM. I think the LX is only 5.5 GPM. It seems to me that 3/8" should be plenty.

The plan and parts I have to make my third function will be stacking two solenoid valves that have -10, 5/8" ports. Mainly because I already had one laying around so I ordered a second to make the system a true third function. The valves have two sections but are only one function so I will plug one section on them. I have plenty of flow rate on the valves. Curious though they are only rated at 13 GPM no matter which size ports you order them with. I used the same valve with -08, 1/2" ports on my JD diverter. It has worked flawlessly but it is not inline with the power beyond channel.
 

TheOldHokie

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I asked TTWT if the Kubota third function lines on his LX3310 were 3/8" or 1/2" and he said both the supply and return were 1/2".

When I searched the intraweb for hydraulic flow rates on 3/8" lines the answer came up over 20GPM. I think the LX is only 5.5 GPM. It seems to me that 3/8" should be plenty.

The plan and parts I have to make my third function will be stacking two solenoid valves that have -10, 5/8" ports. Mainly because I already had one laying around so I ordered a second to make the system a true third function. The valves have two sections but are only one function so I will plug one section on them. I have plenty of flow rate on the valves. Curious though they are only rated at 13 GPM no matter which size ports you order them with. I used the same valve with -08, 1/2" ports on my JD diverter. It has worked flawlessly but it is not inline with the power beyond channel.
TTWT is no authority on hydrsulic system design snd hose size does not tell you a thing about fitting and port sizes.

Kubota uses 3/8 hoses on their L series loaders and backhoes so they think its adequate and 1/4 handles 5.5 GPM on B series machines.

I dont see how you can or why you would want to stack two valves to get "true third function" on a loader. Please diagram that for me....

Dan