Loader Third function does not work with curl, only lift lower on mx5200, is this typical?

[ovrszd]

Boy, this can get technical, and opinionated....

My M9540 has Kubota's 3rd function. It will lift, curl and 3rd function at the same time, although at reduced speed.

Lift and curl at the same time is very common. My M9540 does it, my Brother's L3240 does it I think the B3200 my Son just bought does it but can't confirm that. So let's not leave this discussion thinking that feature is rare. It's actually very, very common.

As to the OP's 3rd function. You obviously have a "Diverter Valve" setup. Without engaging the 3rd function with it's button you have lift and curl. By engaging the 3rd function with it's button you now have lift and 3rd function. Thus the descriptive name "Diverter". You can only have 2 functions at once. You can become adept at operation by learning to quickly depress/release the button while curling. This will allow you with some limited success to curl and "grip" something.

The 3rd function on my M9540 is different. It utilizes "pressure" beyond the FEL valves. It has two buttons on the joystick, one for "open", one for "close". So,,, I always have lift and curl. When I activate the 3rd function it uses whatever hydraulic flow/pressure is left from the lift/curl function. The hydraulic pump flow rate is high enough that with normal function it powers all three with minimal delay.

 

[MechanicalGuy]

Boy, this can get technical, and opinionated....

My M9540 has Kubota's 3rd function. It will lift, curl and 3rd function at the same time, although at reduced speed.

Lift and curl at the same time is very common. My M9540 does it, my Brother's L3240 does it I think the B3200 my Son just bought does it but can't confirm that. So let's not leave this discussion thinking that feature is rare. It's actually very, very common.

As to the OP's 3rd function. You obviously have a "Diverter Valve" setup. Without engaging the 3rd function with it's button you have lift and curl. By engaging the 3rd function with it's button you now have lift and 3rd function. Thus the descriptive name "Diverter". You can only have 2 functions at once. You can become adept at operation by learning to quickly depress/release the button while curling. This will allow you with some limited success to curl and "grip" something.

The 3rd function on my M9540 is different. It utilizes "pressure" beyond the FEL valves. It has two buttons on the joystick, one for "open", one for "close". So,,, I always have lift and curl. When I activate the 3rd function it uses whatever hydraulic flow/pressure is left from the lift/curl function. The hydraulic pump flow rate is high enough that with normal function it powers all three with minimal delay.

I doubt it is a diverter valve. It is a factory installed option from Kubota. I wish hydraulic schematics where available. Why is this stuff so cryptic from the manufacturers?

My valve was installed with two buttons on a new control lever from an option that Kubota offers. The most reasonable suggestion that I've heard so far is that on my caliber of machine, the extra hydraulics don't support three simultaneous movements at once. I believe the curl supplies both sides as well.

Besides, "lift and curl" simultaneously was not the topic of discussion. Curl and clamp was.

 

[ovrszd]

I doubt it is a diverter valve. It is a factory installed option from Kubota. I wish hydraulic schematics where available. Why is this stuff so cryptic from the manufacturers?

My valve was installed with two buttons on a new control lever from an option that Kubota offers. The most reasonable suggestion that I've heard so far is that on my caliber of machine, the extra hydraulics don't support three simultaneous movements at once. I believe the curl supplies both sides as well.

Besides, "lift and curl" simultaneously was not the topic of discussion. Curl and clamp was.

Thanks for that clarity. Wish it had been in the first post.

Your 3rd function valve gets it's input from your FEL valve "power beyond" port. It's not confined to the curl function as is the case with a diverter valve. So, as I said in my previous post, my tractor's flow rate is high enough to offer suitable power to all three functions at once. You might not have that luxury.

"Lift and Curl" was mentioned earlier as something that's rare. I discussed that function as something that's very common.

 

[MechanicalGuy]

Also, I believe "counterbalance" would be the valve configuration used to provide pressure on both sides of the cylinder for the curl. I don't know why it didn't occur to me at first.

 

[MechanicalGuy]

Thanks for that clarity. Wish it had been in the first post.

Your 3rd function valve gets it's input from your FEL valve "power beyond" port. It's not confined to the curl function as is the case with a diverter valve. So, as I said in my previous post, my tractor's flow rate is high enough to offer suitable power to all three functions at once. You might not have that luxury.

"Lift and Curl" was mentioned earlier as something that's rare. I discussed that function as something that's very common.

It's literally the first sentence:

Dealer installed third function for grapple but it doesn't work with curl simultaneously, only by itself or with lift

 

[ovrszd]

It's literally the first sentence:

Dealer installed third function for grapple but it doesn't work with curl simultaneously, only by itself or with lift

Sorry, but your dealer could have installed, 1. True 3rd Function (as he did). 2. Diverter valve.

Your statement describes Diverter Valve characteristics to a T. Anyone with a Diverter valve could use your sentence to describe it and be very accurate.

 

[MechanicalGuy]

Sorry, but your dealer could have installed, 1. True 3rd Function (as he did). 2. Diverter valve.

Your statement describes Diverter Valve characteristics to a T. Anyone with a Diverter valve could use your sentence to describe it and be very accurate.

That's why I was very specific with the title and the first words of the thread : "Dealer installed third function"

Not sure what you're talking about.

 

[ovrszd]

That's why I was very specific with the title and the first words of the thread : "Dealer installed third function"

Not sure what you're talking about.

Dealers will install whatever you want.....

I think I'll bow out.

 

[JWR]

Thanks for that clarity. Wish it had been in the first post.

Your 3rd function valve gets it's input from your FEL valve "power beyond" port. It's not confined to the curl function as is the case with a diverter valve. So, as I said in my previous post, my tractor's flow rate is high enough to offer suitable power to all three functions at once. You might not have that luxury.

"Lift and Curl" was mentioned earlier as something that's rare. I discussed that function as something that's very common.

Power Beyond is an extension hose from the full high pressure of the source pump, often to the loader control valve. It remains part of an open center system. If there are multiple things going on under hydraulic pressure power in some branch from an open center system, it is because there is a flow divider in place. I guess "diverter" is the wrong terminology.