JD LVB24312 Top And Tilt kit info needed

[bam747]

I'm planning to add a TNT kit to my JD 4720. I already have the JD dual diverter hydraulics kit that runs off the FEL joystick to run the TNT kit.

I've done some research here on TBN regarding TNT kits and it seems that a majority of the TNT users recommend TNT cylinders with "double pilot check valves" to prevent the TNT cylinders from changing position due to "leak down".

I cannot find any information on the JD TNT kit on JD's website that specifically says wether or not it has the double pilot check valves. I did call a JD dealer and talked with a representative that seemed to know all about the JD TNT kit and he said two things.

First, their kit does not have double pilot check valves. Second, he said they are not necessary on my 4720 because their hydraulic system is an open center system and, by design, the FEL joystick valve body (which is diverted to the rear hydraulic outlets with the JD dual diverter kit) does not have any leak down issues. Therefore the TNT cylinders will also not have any leak down issues. He specifically said the JD TNT kit on the 4720 using the JD dual hydraulic diverter kit will not change position once set.

Does any one else have the JD TNT kit? If so, assuming you are powering its hydraulics via the JD dual diverter kit, do you experience any leak down of the TNT cylinders?

 

[jsboening]

I've got the kit on my 3720 cab and yes there is some leak down on both cylinders. I don't know if the 3-4000 series share the same hydraulic design. The leak down is fairly minor, meaning if I let the machine sit over night with the box blade on it I notice some movement. I think it's because when the tractor is shut off the hydraulic diverter automatically reverts back to the loader function leaving the top n tilt to do what it may. Overall it was an expensive option but, I've found it to be money well spent. It's been great for mowing, box blading my kids dirt bike track, makes removing mower blades easier, and hooking up attachments is also easier because every attachment seems to sit at a different angle. I will never have a tractor without tnt. Yes, I'm happy with the JD tnt kit.

 

[AKfish]

I ordered the top n tilt on my new JD110. It leaks down.. It's not a critical issue - IMO. But it is annoying and given the price you pay for that option on a new machine (or later add-on) there is little excuse for JD to not provide that function to the hydraulic cylinders that are part of the system.

That said - if you have the key (primary) elements (electric diverter, female hyd connectors and mounting bracket, etc.) why not buy the 3rd party cylinders (with the check valves) and hoses?

You'll save yourself considerable $$$ and send JD another "market message" regarding their product.

Bye the bye; your dealer is blowing smoke up your skirt with his reasoning that the FEL joystick controller doesn't have a leakdown problem - so, the cylinders won't have a problem... I'd be rationing a fair amount of salt with every bit of advice I got from those folk's...

Best of luck with your TnT install.

AKfish