nigel
New Member
Hi,
I've had a leaky trim ram/cylinder so decided to give it a strip-down and re-build.. Water was getting in the fluid and one ram would drop by itself when the boat is out the water and the drive removed. Although this would take a few days.
I took both cylinders off the boat and drained the fluid out of them. The ram that I believed to be leaking would slide in and out quite easily with the fluid hose holes covered up with my fingers. No significant pressure build up either in or out.. Which I -thought- was a fault and indicative of bad seals. The ram I thought to be OK would build up air pressure against my fingers if I pushed the ram in or out... And would spring back to its original position when I released the ram.
Having swapped out all the seals plus the bearing/mechanisim/piston bit and floating piston, I expected the ram to hold air pressure and not be able to push in-or-out freely against sealed-off hose holes.. but it didn't. It behaved as before - sounding like the air is getting past the ram seal or through the bearing/kick-out mechanism.
So.. how should I expect a trim cylinder to behave when its got no fluid in? - Should it side in and out against air even with the hose holes covered up? Is, actually, the ram that builds up pressure the faulty one?
Thanks in advance for any help!!
Nigel.
I've had a leaky trim ram/cylinder so decided to give it a strip-down and re-build.. Water was getting in the fluid and one ram would drop by itself when the boat is out the water and the drive removed. Although this would take a few days.
I took both cylinders off the boat and drained the fluid out of them. The ram that I believed to be leaking would slide in and out quite easily with the fluid hose holes covered up with my fingers. No significant pressure build up either in or out.. Which I -thought- was a fault and indicative of bad seals. The ram I thought to be OK would build up air pressure against my fingers if I pushed the ram in or out... And would spring back to its original position when I released the ram.
Having swapped out all the seals plus the bearing/mechanisim/piston bit and floating piston, I expected the ram to hold air pressure and not be able to push in-or-out freely against sealed-off hose holes.. but it didn't. It behaved as before - sounding like the air is getting past the ram seal or through the bearing/kick-out mechanism.
So.. how should I expect a trim cylinder to behave when its got no fluid in? - Should it side in and out against air even with the hose holes covered up? Is, actually, the ram that builds up pressure the faulty one?
Thanks in advance for any help!!
Nigel.
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