On 15/04/13 16:01, harry wrote:
On Apr 15, 3:01 pm, Jules Richardson
wrote:
I've got an electric sewer pump which uses an oil-filled motor - the
lower seal had a tiny leak which I fixed, but it could use a little
topping up before I use it in anger (the upper bearing's *just*
protruding above the oil surface, so it doesn't need much to cover it
again).

Now, I think that the correct stuff is termed dielectric oil (which I've
been unable to find locally) - but that this *might* be the same as
transformer oil? (I've not seen the latter locally either, but at least
it lets me broaden my search!)

I also saw TNP mention recently that big transformers are filled with
mineral oil; is that true? Mineral oil I can certainly get (and indeed I
have a bottle somewhere) - unless of course not all mineral oils are
created equal, and the consumer-grade stuff is a completely different
animal :-)

cheers

Jules
About twenty years ago many were filled with PCB, a carcinogen.
You can't use mineral oil but transformer oil should be OK.

'mineral oil' is a very broad category. AFAIK transformer oil IS a
mineral oil, but only one of many.

But I agree, transforner oil is a safe bet.

http://en.wikipedia.org/wiki/Transformer_oil


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers.