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11-23-2020, 03:45 PM #1
Single trim ram / cylinder differences
Hi, I have two midsections. One has a trim cylinder of a 260. The other has a cylinder of a 280. The 280 cylinder is a bit thicker and more beefier.
I discovered that the mid with the 260 has more negative trim. The cylinder of the 260 can retract more.
Is anyone familiar with this? Is it normal or is the 280 cylinder not assembled right? (I have no idea whether it has been taken apart yet in the past).
I realy need the extra negative trim the 260 cyl has.
Thanks for your input
Regards
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11-23-2020, 10:43 PM #2
Wouldn’t just putting a 2.5 or 5 degree wedge in be easier than swapping rams around??
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bigboy thanked for this post
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11-23-2020, 11:59 PM #3
The piston travel is the same for both early and late model cylinders . That's not what stops negative travel . The notch cut into the lower guide arms bottoms out against the landing pads on the exterior of the cylinder.
If you want more tuck under , you can machine/ sand the pads .
And then machine the rams internal parts to match.
Don't get carried away .. cuz if the weld holding the top loop touch's the closure cap ... it will be a leaker for sure .
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bigboy thanked for this post
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11-24-2020, 03:41 PM #4
Hi Chaz, i had to reread your post to get it but it's clear now.
The fact is that the part that has the vertical steering pin going through is not touching the ram. I can put my finger in between.
It seems like the piston cannot fully retract although you can feel it is bottomed out.
You say the piston travel is the same for both styles but is the starting point, fully retracted mode, the same too?
If this is the case something must be wrong with cylinder.
Thanks!
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11-24-2020, 11:45 PM #5
This should clear it up ....
These external pads are the retracting stops ---->
When they make contact here --->
That's it . End of the road . If the hydraulic parts inside were used as the stops . It wouldn't take long to ruin the cylinder.
Yes you are correct ... fully compressed, there is aprox. 13 to 15 mm between the body and the base of the loop , that is normal (this one is not .. rusted out) -->
More better ...
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bigboy thanked for this postphillnjack liked this post
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11-26-2020, 04:26 PM #6
Thanks. Very clear. I will dissamble the cylinder.
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04-05-2021, 03:22 PM #7
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David - WI liked this post
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04-05-2021, 07:07 PM #8
Your center bolt has loosened up . When seated , the spring guide's three prongs fit inside a little step machined into the bypass block.
I have one here now that someone tightened the assembly without aligning the three tabs and crushed the guides .
You are correct , they are not sold separately ...
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bigboy thanked for this postDavid - WI liked this post
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04-06-2021, 11:52 AM #9
Yes, one guide has a folded / crushed lip...
Are they realy necessary?
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04-07-2021, 04:01 PM #10
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