hydraulic top link

[219Kevin]

hi all...new to the forum. I've had a B7300 for 20 years and recently purchased an L2502. I had the dealer install the 2 rear remotes.
I'm looking for a good top n tilt kit...one that won't drift on me. I've heard the Kubota kit isn't all that great. Can you guys point me in the right direction?
Thanks in advance

 

[TheOldHokie]

Drift is mainly a function of internal leakage in your control valves. Its been said the Kubota valves have more than normal.

The way to deal with that is pilot operated check vslves on the cylinders - frequently callec a "lock valve". Here is a top link with a check valve.

Dan

 

[219Kevin]

thanks for the reply. during my research those summit valves keep popping up. what is your opinion on those? And which one would I need?

 

[TheOldHokie]

thanks for the reply. during my research those summit valves keep popping up. what is your opinion on those? And which one would I need?

I think we have a little confusion here.

Short answer is I have used Summit products for quite a few years with no issues.

Now the longer answer.

You already have two OEM directional control valves (DCV) on your new tractor. Those DCVs will be used to control your TnT cylinders and are the concern when it comes to drift.

One way to prevent drift caused by leaking directional control valves is to install a double pilot operated check valve (DPOCV) on each cylinder. Thats whats pictured on the Summit top link I posted. DPOCV check valves are considered zero leakage devices and will hydraulically lock the cylinder. They have the side effect of preventing float operation of the cylinder.. Did you purchase OEM directional control valves with the float option?

Dan

 

[219Kevin]

I think we have a little confusion here.

Short answer is I have used Summit products for quite a few years with no issues.

Now the longer answer.

You already have two OEM directional control valves (DCV) on your new tractor. Those DCVs will be used to control your TnT cylinders and are the concern when it comes to drift.

One way to prevent drift caused by leaking directional control valves is to install a double pilot operated check valve (DPOCV) on each cylinder. Thats whats pictured on the Summit top link I posted. DPOCV check valves are considered zero leakage devices and will hydraulically lock the cylinder. They have the side effect of preventing float operation of the cylinder.. Did you purchase OEM directional control valves with the float option?

Dan

my bad...said "valves" instead of cylinders.... been a long week lol
the remote valves are spring center valves part # L7231A

 

[old and tired]

Are you planning to get Pat's quick hitches (or do you already have one)? Reason being you'll need a top link that's 4" longer after you get Pat's quick hitch... Just something to think about. {edit; corrected}

As said, a double pilot operated check valve (DPOCV), will keep the cylinder from drifting. DPOCV locks the pressure down and needs a few hundred (??) pounds of pressure to release. Your valves, being installed by Kubota, are prone to leaks but that does not effect a cylinder with a double pilot operated check valve (circled in red below).

 

[MtnViewRanch]

Are you planning to get any quick hitches (or do you already have one)? Reason being you'll need a top link that's 4" longer after you get a quick hitch... Just something to think about.

As said, a double pilot operated check valve (DPOCV), will keep the cylinder from drifting. DPOCV locks the pressure down and needs a few hundred (??) pounds of pressure to release. Your valves, being installed by Kubota, are prone to leaks but that does not effect a cylinder with a double pilot operated check valve (circled in red below).

Actually, the top link does not need to be any longer when using a full 3pt quick hitch.
If Pat's quick hitch is used, that is when the longer top link is needed.

Be sure to do your research regarding the top & tilt set. They are not all equal.
For your application, you will be better off getting cylinders with check valves similar to what is pictured.

Look at the following link to determine what working length fits your application best.
I have found that a 20"-29" working length works well, but it is always best to check for yourself.

 

[219Kevin]

Are you planning to get Pat's quick hitches (or do you already have one)? Reason being you'll need a top link that's 4" longer after you get Pat's quick hitch... Just something to think about. {edit; corrected}

As said, a double pilot operated check valve (DPOCV), will keep the cylinder from drifting. DPOCV locks the pressure down and needs a few hundred (??) pounds of pressure to release. Your valves, being installed by Kubota, are prone to leaks but that does not effect a cylinder with a double pilot operated check valve (circled in red below).

I use a speeco quick hitch

 

[219Kevin]

Actually, the top link does not need to be any longer when using a full 3pt quick hitch.
If Pat's quick hitch is used, that is when the longer top link is needed.

Be sure to do your research regarding the top & tilt set. They are not all equal.
For your application, you will be better off getting cylinders with check valves similar to what is pictured.

Look at the following link to determine what working length fits your application best.
I have found that a 20"-29" working length works well, but it is always best to check for yourself.

Thanks!

 

[219Kevin]

Actually, the top link does not need to be any longer when using a full 3pt quick hitch.
If Pat's quick hitch is used, that is when the longer top link is needed.

Be sure to do your research regarding the top & tilt set. They are not all equal.
For your application, you will be better off getting cylinders with check valves similar to what is pictured.

Look at the following link to determine what working length fits your application best.
I have found that a 20"-29" working length works well, but it is always best to check for yourself.

Thank you!

 

[219Kevin]

Are you planning to get Pat's quick hitches (or do you already have one)? Reason being you'll need a top link that's 4" longer after you get Pat's quick hitch... Just something to think about. {edit; corrected}

As said, a double pilot operated check valve (DPOCV), will keep the cylinder from drifting. DPOCV locks the pressure down and needs a few hundred (??) pounds of pressure to release. Your valves, being installed by Kubota, are prone to leaks but that does not effect a cylinder with a double pilot operated check valve (circled in red below).

Thank you!

 

[TheOldHokie]

my bad...said "valves" instead of cylinders.... been a long week lol
the remote valves are spring center valves part # L7231A

Since you dont have float on your control valves a DPOCV will prevent cylinder drift. I opted to use Summit's DPOCV valves on the outlets rather than the cylinder. The plus there is it eliminates valve leakage and works on any cylinder connected to the outlets.

Dan

 

[Russell King]

You can check out Fit Rite Hydraulics

He builds custom hydraulic top and tilt cylinders

 

[Daferris]

If your on a budget check out the spare parts Holland store on eBay. I've had mine for two years and have not had any issues.
This is a link to the side link I made the link to the top link it's near the bottom of the first post...

LX2610 Hydraulic side link fabrication total cost $271.00

Hydraulic side link fabrication. This was more involved as I could not find a cylinder that was more or less a bolt on option at an affordable price. I ended up modifying a cylinder. As well as buying a spare side link to cut the mounts off of. Total cost for this project was $271.60 plus my...

www.orangetractortalks.com

 

[Runs With Scissors]

One thing not mentioned yet regarding the DPOCV, is that trying to buy the cylinders and the "cylinder mounted DPOCV" separately and doing it yourself, will/may turn out to be a complete nightmare, (and as pointed out early on, completely unnecessary)

So unless you are a "Hydraulics Guru" like @TheOldHokie , be sure to use a DPOCV in the lines (like he pictured).

Here is an amusing tale of a "guy that I know" that tried it.....

https://www.orangetractortalks.com/...-to-shoot-ones-self-in-the-foot-part-1.63695/