LEONZ, perhaps you could point us to the details on this "stop tube" idea. I did three different searches in TBN under your userid, but was unable to find any detail on what you are suggesting. It sounds like an option my JD backhoe attachment badly needs. When retracting the boom fully, that last half inch of cylinder movement makes the boom jump six inches and hit the stops hard. It is practically impossible to move it slowly enough to keep it from slamming into the park position.
====================================================================================================
The last time I detailed it was in 2009-10:
The stop tube becomes a huge piston where in the stop tube has a greater
surface area than the actual piston of the cylinder.
The addition of the stop tube to the cylinder adds to the surface area of the
piston and reduces the stresses on the barrel, stuffing box and cylinder rod.
The formula for sizing the stop tube is this.
With the cylinder fully extended you determine the lenght of the stop tube(s)
if mount in pairs and they must have two stop tubes if you have two cylinders.
Now: the preferred material is a round bronze slug which is 1/32 of an inch smaller
in diameter than the inside diameter of the cylinder barrel.
The bore in the bronze slug is 1/32 of an inch larger in diameter than the cylinder rod.
If you have a cylinder that has and extended length of 36 inches you need a stop tube
that is 3 inches long. you will loose three inches of stroke but in the scheme of things
you will not notice it.
If you have a partial measurement that is less than one foot add one inch
of stop tube length to the total length to achieve the proper size stop tube(s).
The preferred material is bronze simply because the bronze will not damage any of
the valves as it is very soft.
The bronze stop tube(s) is/are installed between the stuffing box and the piston before you
install it in the cylinder barrel(s).
You can purchase bronze from
www.Mcmastercarr.com and other vendors.
If you have a metal lathe you could do your own machining or purchase a Sherline lathe if it
can handle the slug outside diameter.
The Sherline Lathe, Milling Machine and Precision Miniature Machining Page
_________________________________________________________________
Once you go flail you never go back:thumbsup::licking::drool:
