ghostlymoron
Well-Known Member
Hi,
I have just serviced my Gibb ST28s and thought others may be interested in what I learnt.
Below are 2 photos after dismantling. (I hope - never posted photos before)
Main components before assembly
Second pawl partially removed
Replacing the stripper arm
Procedure for dismantling was as follows:
After removing the upper circlip and top, the stripper arm unscrews (normal thread) mine needed a sharp tap with hammer and wood block. The drum can then be removed. To fully dismantle it is necessary to remove the winch from the boat (a real pain) because the pin retaining the bottom drive cog comes out downwards. Mine was a tight fit but combination of WD40, gentle heat on the casting (place on a hot radiator for half hour) and a sharp tap from hammer using a suitable sized punch (old 8mm drill upside down) did the trick.
The inner shaft housing the pawls is removed from underneath also (same circlip arrangement as the top). The pawls can be removed using a small screwdriver to flip up the spring leg out of it's channel.
There is a nylon bush inside the inner shaft which probably doesn't need to be removed but if you want to it can be driven out from below again using a suitable drift - pre-heating the inner shaft again facilitates this. Note that, when re-inserting the bush, there is a chamfer on one end that goes in first.
After cleaning all components with parafin, I greased the sprockets and mating surfaces with waterproof grease (not having any winch grease handy) and just lightly oiled the pawls with 3 in 1. Check the operating of the pawls after re-installing and replace springs if they seem weak.
Assembly is straighforward - even for me.
More photos of the whole process on photobucket if you're interested.
Hope I'm not teaching everone to suck eggs but I would have found the information useful a couple of weeks ago.
Extra photos
I have just serviced my Gibb ST28s and thought others may be interested in what I learnt.
Below are 2 photos after dismantling. (I hope - never posted photos before)
Main components before assembly
Second pawl partially removed
Replacing the stripper arm
Procedure for dismantling was as follows:
After removing the upper circlip and top, the stripper arm unscrews (normal thread) mine needed a sharp tap with hammer and wood block. The drum can then be removed. To fully dismantle it is necessary to remove the winch from the boat (a real pain) because the pin retaining the bottom drive cog comes out downwards. Mine was a tight fit but combination of WD40, gentle heat on the casting (place on a hot radiator for half hour) and a sharp tap from hammer using a suitable sized punch (old 8mm drill upside down) did the trick.
The inner shaft housing the pawls is removed from underneath also (same circlip arrangement as the top). The pawls can be removed using a small screwdriver to flip up the spring leg out of it's channel.
There is a nylon bush inside the inner shaft which probably doesn't need to be removed but if you want to it can be driven out from below again using a suitable drift - pre-heating the inner shaft again facilitates this. Note that, when re-inserting the bush, there is a chamfer on one end that goes in first.
After cleaning all components with parafin, I greased the sprockets and mating surfaces with waterproof grease (not having any winch grease handy) and just lightly oiled the pawls with 3 in 1. Check the operating of the pawls after re-installing and replace springs if they seem weak.
Assembly is straighforward - even for me.
More photos of the whole process on photobucket if you're interested.
Hope I'm not teaching everone to suck eggs but I would have found the information useful a couple of weeks ago.
Extra photos
Last edited:
