Dismanteling a Johnson F7B-903 impeller cooling pump
On 31 mrt, 21:08, Bruce In Bangkok wrote:
On Tue, 31 Mar 2009 11:12:51 -0700 (PDT), Len
wrote:
The shaft will have to be pressed out of the bearings but (if I
remember correctly) it isn't difficult.
Thanks Bruce,
By not difficult you mean I might be able to push the shaft out using
some leverage?
If so I'm planning to construct some tool with a seat on the shaft
which I can push down with a lever.
The question is can I produce the necessary kgf's to get things
moving.
is no reason for a pump to leak after a few hours of running. Most of
them don't leak after several years. Examine the shaft for wear and by
the way, parts are expensive.
I had a similar problem and discovered that the people that re-built
the pump simply installed new seals and the problem was the shaft
which had a groove worn in it where the seal was mounted. A new shaft
was a hundred dollars, or so, if I remember.
I hope I'll be able 1) to move the shaft 1mm up or down so
the surface in contact with the seal will be "new" and therefore
undamaged
or 2) ask a machineshop to remove a tiny bit on the spot where the
seal-
ring touches, afterwards polish it to a stunning shine....
I am looking forward to the several years of use without leaking like
you mentioned....
Thanks for your time.
Len.
on board s/v Present
At the moment in Carriacou
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