Toplink Another Hydraulic Toplink Question

[N80]

Thanks!

 

[MtnViewRanch]

What is a double-piloted check valve? A double-piloted check valve locks a cylinder in place and prevents any movement due to by-pass (up to 600 PSI) from the valve and will also give you a level of safety if a hose was to fail. Safety first is the main reason. OSHA and the EU require piloted check valves as a safety on agricultural and industrial equipment when an object is lifted with a hydraulic cylinder and has no mechanical safety catch.

Sooooooo, all of the loaders out there have these check valves?

 

[jinman]

I've heard people recommend using a certain hose size to limit the speed which the piston extends and retracts. Can anyone elaborate on this. Can you make hoses yourself the way you can with air compressor hosing, or do the hoses have to be custom made? If so, how much is that?

George, if I were going to use a positional control like an HTL and could get even smaller hoses than 1/4", I would get them. It's just that 1/4" hose seems to be the smallest commonly available size. Small hoses are much easier to route and have a much tighter bend radius. I use 1/4" hoses on my toplink, sidelink, and grapple with single cylinder. I can assure you the flow is plenty. I've even installed orifices to slow it down.

 

[nomad]

It seems that there are people "talking too good" about their toplinks. First of all, their rods of all hydraulic toplinks now are chromium coated, with a standard wall thickness (between 3/8" - 1/2") that 2" diamater cylinder has. Of course, the ball ends are forged and CNC machined. Adding check valve is easy if you pay 20-30 USD more. In my area, I am selling these toplinks (2" bore, 20"-28" open-close lengths, with checkvalve, with forged ends on both ends with 3/4" eye) for much less than prices here. However, knowing that most of hydraulic toplinks out there coming from Turkey, prices of toplinks will increase a lot soon because of 50-60% increase in prices of all raw materials (except plastics.)

 

[greg_g]

However, knowing that most of hydraulic toplinks out there coming from Turkey, prices of toplinks will increase a lot soon because of 50-60% increase in prices of all raw materials (except plastics.)

Increased raw materials, coupled with the weak dollar.

I yearn for the old days when the dollar bought three and a half marks, and I was able to buy a Bimmer for six grand.

//greg//

 

[HayDR]

It seems that there are people "talking too good" about their toplinks. First of all, their rods of all hydraulic toplinks now are chromium coated, with a standard wall thickness (between 3/8" - 1/2") that 2" diamater cylinder has. Of course, the ball ends are forged and CNC machined. Adding check valve is easy if you pay 20-30 USD more. In my area, I am selling these toplinks (2" bore, 20"-28" open-close lengths, with checkvalve, with forged ends on both ends with 3/4" eye) for much less than prices here. However, knowing that most of hydraulic toplinks out there coming from Turkey, prices of toplinks will increase a lot soon because of 50-60% increase in prices of all raw materials (except plastics.)

Erol Abit alias Nomad is not to be believed. I have seen and tested the quality of the hydraulic MFG he speaks of and their rods were chromed but not hardened. They do not use the latest type PTF seals like we use.

 

[nomad]

Hardening a rod costs a dollar or two maximum. Cost of best quality seal will cost less than 3 usd. Who will avoid 3-4 dollars in 150-200 usd items? Figures speaking do not tell lie.

 

[HayDR]

Hardening a rod costs a dollar or two maximum. Cost of best quality seal will cost less than 3 usd. Who will avoid 3-4 dollars in 150-200 usd items? Figures speaking do not tell lie.

One of the main problems with hydraulic cylinders is also the better the steel tube the better the hydraulic cylinder. All of your business is predicated on price. If you choose secondary components, your finished products will be second rate.

 

[greg_g]

Erol Abit alias Nomad is not to be believed.

Hmmm....an American importer of Turkish HTLs maligning a mechanical engineer from Turkish farm country. Something's wrong with this picture....

Personalities aside, I think CCM's $185-$230 toplinks - given rising steel prices and the falling dollar - are quite competitive.

//greg//

 

[nomad]

One of the main problems with hydraulic cylinders is also the better the steel tube the better the hydraulic cylinder. All of your business is predicated on price. If you choose secondary components, your finished products will be second rate.

Almost all hydraulic cylinder manufacturers in the world use the same, high tensile, precision hydraulic tubes in this standard; DIN 2391/C ST52. (Google for ASTM equivalents.) So, there is no quality difference between hyd. cylinder raw materials. Quality difference between honing laborship? Maybe, a little difference from a honing workshop to another workshop. But, these tractor hydraulic toplinks are simple hydraulic cylinders. So, small honing quality difference is not important. And, their rods of cylinders? All of them are hard chromium (electroless) coated with a thickness of 20-40 microns. Surface hardness of these rods change between 65-80 HRC. I myself measured them. So, strength of materials used in these hydraulic toplink cylinders are same, maybe, with an ignorable difference.