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Old 25 May 2005, 14:17   #11
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Country: UK - Wales
Town: Port Talbot
Boat name: Big Blue / Aurora
Make: Pac 22 Taskforce 810
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Paul. There is a ball bearing on a spring inside the ram that acts as a pressure relief valve if the leg hits something.
I had the problem of being able to move my leg with no air in the system and traced it to one of these balls being corroded and not seating properly.
If this is the case you will need to pipe the rams up one at a time to the pump to determine which one is faulty.
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Old 26 May 2005, 13:11   #12
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rams

leroy,
thanks for the info any ideas the easy way of doing it?
Paul
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Old 27 May 2005, 03:44   #13
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The valve is a spring sitting on a ball bearing sitting on a drilling at the bottom end of the ram. The drilling to ball bearing faces is where the problems occur. Internally on the bottom end of the ram there is a big nut, undo this and you will find the ball bearing and springs. I found that if I hit the ball bearing with a punch while it was sitting on the drilling it made it seat properly, having said that it took me a couple of goes to get it right
The other thing to watch out for is that some of the rams were made badly, the inner sleeve was not long enough, to check for this, once you have checked the valve, pressurise one side of the ram with air and make sure nothing is coming out the other side Des
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Old 27 May 2005, 06:14   #14
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Country: UK - Wales
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Boat name: Big Blue / Aurora
Make: Pac 22 Taskforce 810
Length: 6m +
Engine: 160Mermaid 250Sabre
MMSI: 235061166
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When I removed the ram from the boat I removed the outer pins and unscrewed the ram from the outer housing leaving the outer housing attached to the boat, not sure if this is the best idea but my boat has had a new transom and the access ports to the inner pins has been glassed over.
As Des said the ball bearing is under a big nut at the end of the ram, the ball bearing in my ram was beyond saving although the seat in the ram was ok.
I eventually managed to get a new ball of the correct size from a friend who spent some time splitting used bearings in his factory looking for one!!
I then lapped this in using fine cutting compound.
I also changed some dodgy looking O rings while I had the ram in pieces.
I took photos of the ram during disassembly with my mobile Just incase I was left with spares after reassembly!!!
Hope this helps.
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Old 27 May 2005, 06:20   #15
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Quote:
Originally Posted by Leroy
.............my boat has had a new transom and the access ports to the inner pins has been glassed over.
Can you get to the prop shaft grease nipples or the intermediate bearing housing?
Des
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Old 27 May 2005, 06:53   #16
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Country: UK - Wales
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Make: Pac 22 Taskforce 810
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Engine: 160Mermaid 250Sabre
MMSI: 235061166
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Posts: 32
Des, I can get to all the internals of the leg, but the gap between the leg and the bulkheads either side is next to nothing I can just about get the tip of my finger in the gap to feel that there is a pin fitted.
I was told there should be a cut out or hole there to allow removal of these pins.
On the subject of grease nipples, Is there one on the uj under the bellows?
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Old 27 May 2005, 07:07   #17
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Quote:
Originally Posted by Leroy
Des, I can get to all the internals of the leg, but the gap between the leg and the bulkheads either side is next to nothing I can just about get the tip of my finger in the gap to feel that there is a pin fitted.
I was told there should be a cut out or hole there to allow removal of these pins.
On the subject of grease nipples, Is there one on the uj under the bellows?
Oh right, I can get he inner pins out without using the holes (bloody strain, but possible) using a ratchet and screwdriver to leaver the pin out once it is byond the thread.

There a two grease nipple below the bellows and do need keeping an eye on Des.
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Old 27 May 2005, 07:14   #18
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Posts: 32
Thanks Des,
I did look briefly and couldnt find any, I think I will go and have another look in that case!
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Old 27 May 2005, 07:20   #19
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Quote:
Originally Posted by Leroy
Thanks Des,
I did look briefly and couldnt find any, I think I will go and have another look in that case!
They are tucked right in the middle of the spider and are little ones , happy hunting Des
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Old 28 May 2005, 16:46   #20
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rams

Thanks for the info, has anyone got any drawings of this lot i believe ours is the next leg up in their range (103) something like that i expect the rams will be the same.
Paul
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