Posted by Jim.ME on November 30, 2021 at 03:25:24 from (67.242.178.40):
In Reply to: Loader cylinder posted by grandpa Love on November 29, 2021 at 18:12:58:
I agree with used red MN. That looks like a single acting, displacement type ram. Oil fills the entire barrel except for the space occupied by the ram. Adding oil under pressure pushes the ram out. When the pressure is released (lowering), the ram moves back into the barrel displacing oil. There won't be a piston with packing on it, at most a guide to keep it centered in the barrel bore. With this type ram the bore of the barrel is not critical as it is for one that has a piston with packings that have to seal in the barrel bore, like a double acting type cylinder. The only seal material, often compressible Vee packing, on these type rams is under the internal nut shown in his picture. The packings can be tightened up a number of times (even added to sometimes) over its life. Not real clear in the pictures, but it looks like a punch was used to turn the nut in the past, not an uncommon practice.
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