From the WTF department.

I have a 5x16 Hyd Eaton cylinder from Surpluscenter that leaked from the rod
from day one. I finally got a kit for it and took it apart to find small
void in the rod end casting that went from the port to both sides of the
main seal. I pumped lacquer thinner through the passage and filled it the
best I could with "JB WELD" and machined it down. In retrospect, I wonder
if there was a better way. If this fails, should I try something else?

Another hydraulic question:

I want to move a 1 x 8 x 16 plate, 8 inches travel, on 2, 1" rods with
Nyliners. I want to use 2 hyd. cylinders, 8 x 1.5", mounted near the rods.
Will I have to worry about the cylinders extending or retracting at
different rates thus cocking the plate? Assume they are plumbed to a common
speed control and "Y"'d with equal lines. I will be running at @ 500 psi.

Is it posable to get the plate replaced ?Sounds like a manufacture
defect?

Probably, but I need it running NOW. I did call surpluscenter with the leak
and they said they would replace the cylinder. I thought that was a waste
of freight and they offered to pay for the seal kit when I found one...it
just wasn't the seals. It was made in....China, imagine that! Eaton hasn't
called me back yet. So, I figure I'm on my own again.

"HaroldA102" wrote in message
...

Is it posable to get the plate replaced ?Sounds like a manufacture
defect?

at this put all you can do i collect the oil
and return it to the resiover.

I would suggest two things

let surplus center replace the cylinder

and you want to use a flow divider to equal the stroke of the cylinders

there are various ones available from surplus center
you wart the one that does an equal division regardless of pressure,

or you might try to just use one cylinder to move your plate


how much weight are you moving?

Tom Gardner wrote:
From the WTF department.

I have a 5x16 Hyd Eaton cylinder from Surpluscenter that leaked from the rod
from day one. I finally got a kit for it and took it apart to find small
void in the rod end casting that went from the port to both sides of the
main seal. I pumped lacquer thinner through the passage and filled it the
best I could with "JB WELD" and machined it down. In retrospect, I wonder
if there was a better way. If this fails, should I try something else?

Another hydraulic question:

I want to move a 1 x 8 x 16 plate, 8 inches travel, on 2, 1" rods with
Nyliners. I want to use 2 hyd. cylinders, 8 x 1.5", mounted near the rods.
Will I have to worry about the cylinders extending or retracting at
different rates thus cocking the plate? Assume they are plumbed to a common
speed control and "Y"'d with equal lines. I will be running at @ 500 psi.



The 2 cyl will not travel equally if the load is not equal, unless they
are mechanically connected.

In article ,
"Tom Gardner" wrote:

From the WTF department.

I have a 5x16 Hyd Eaton cylinder from Surpluscenter that leaked from the rod
from day one. I finally got a kit for it and took it apart to find small
void in the rod end casting that went from the port to both sides of the
main seal. I pumped lacquer thinner through the passage and filled it the
best I could with "JB WELD" and machined it down. In retrospect, I wonder
if there was a better way. If this fails, should I try something else?

Call surplus center and bitch at 'em. (:

Another hydraulic question:

I want to move a 1 x 8 x 16 plate, 8 inches travel, on 2, 1" rods with
Nyliners. I want to use 2 hyd. cylinders, 8 x 1.5", mounted near the rods.
Will I have to worry about the cylinders extending or retracting at
different rates thus cocking the plate? Assume they are plumbed to a common
speed control and "Y"'d with equal lines. I will be running at @ 500 psi.

I'll likely cock over unless you have something to force it to stay
flat--like a rigid guide or a bit of creative linkage. Since it's only
8 inches it's probably cheap and easy to just get some tubing, one
inside the other, one welded down to the plate, one to the frame, lots
of grease.
A cheap & inefficient way to force them to both travel about the same
speed is to restrict the two lines after the split. Make sure the
restrictions are enough to really slow down the flow and blow open a
relief valve somewhere before the split. Using skinny-assed lines with
an oversized pump (or just turn it really fast) will probably work. But
it'll waste a bunch of power. Your pump pressure will have to be higher
than 500 even if only 500 gets to the cylinders and the whole thing will
run slow.
You could also just install two valves and manually keep them
aligned. Depends on what you've got around.

--
B.B. --I am not a goat! thegoat4 at airmail.net

How does a flow divider work? I understand that for equal motion you
need equal volumetric flow, but how does it do that?

On Tue, 17 Aug 2004 18:26:28 -0500, "williamhenry"
wrote:

I would suggest two things

let surplus center replace the cylinder

and you want to use a flow divider to equal the stroke of the cylinders

there are various ones available from surplus center
you wart the one that does an equal division regardless of pressure,

or you might try to just use one cylinder to move your plate


how much weight are you moving?

snip
how much weight are you moving?


Just the weight of the plate but it needs to apply a few hundred pounds of
pressure to a fixture at the bottom of the stroke

The ones I've seen are essentially two hydraulic pumps on one shaft.
(Actually just 4 gears, 2 cavities, one shaft) Same volume has to go
through both sides.

We had a major machine designed and built using the double cylinder
principle. The ram did not have any rigidity against cocking. Fought
with it for years. Even used a huge equilizer on it. After a few hours
of off center operation it would still have cocked over slightly due to
leakage in the equalizer.

Don Foreman wrote:

How does a flow divider work? I understand that for equal motion you
need equal volumetric flow, but how does it do that?

On Tue, 17 Aug 2004 18:26:28 -0500, "williamhenry"
wrote:


I would suggest two things

let surplus center replace the cylinder

and you want to use a flow divider to equal the stroke of the cylinders

there are various ones available from surplus center
you wart the one that does an equal division regardless of pressure,

or you might try to just use one cylinder to move your plate


how much weight are you moving?