"I want to clean up my horns, and am wondering - can i immerse them in a
derust solution? can i spray them with paint remover? can someone give me
a one paragraph on how they work? should i take them completely apart? how
hard is that, and, more importantly, to actually get them back together?"
Hi Oliver,
Not a real big deal to dissemble the horns and refurbish.
I have done a few sets.
DO NOT IMMERSE THE LITTLE SUCKERS IN ANYTHING WHEN THEY ARE ASSEMBLED!!!!!!!
Carefully remove all the perimeter fasteners and then prise the swirl from
the body.
The back shell just clips over the works (early type).
Inside there will be a few paper gaskets and the electrical bits with a thin
metal diaphragm.
The easiest way I found to clean up the horns was to paint strip/grit blast
the external covers.
Then primer and paint the swirl(alloy). The shell would probably be better
plated then painted(steel).
If you do one at a time or alternatively take some digi pics of the
dissembly, re-assembly should be straight forward.
Just cut some new gaskets from a thin sheet of gasket paper and use a wee
bit of silicon sealant when re-assembling.
The metal diaphragm is attracted to the electromagnet when it is energised,
operates a break contact, then returns to its normal postion.
While 12V is applied this cycle is repeated 600 times a sec. for lo tone and
800 times a sec. for hi tone.
The contact is screw adjustable so you can optimise the operation after
reassembly.
Provided the coil has electrical continuity and the contact operates
properly and is clean, the horn should function OK.
I have both the early and late style horns here so any questions let me know
and I'll try to help.
Regards,
Graeme Suckling
1965 SP310
1971 P510
1972 PL510
1973 HS30
1993 ECR33 Skyline GTS25t
http://www.imagestation.com/album/pictures.html?id=4291195515
Adelaide
South Australia.
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