Is graphite not a good speedo cable lube - or is using graphite an obsolete
idea ?
Dick Matson
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Sent: Monday, April 19, 2010 1:03 AM
Subject: Re: [Healeys] speedo
In general a speedo (or rev counter) cable should never be lubricated
with oil. This will nearly always lead to problems: to much oil being
used, pumping action up or down, little resistance to corrosion.
Let the outer cable soak in petrol or white spirits for a day or use a
degreaser unit to pump degreasing agent through the cable for a while.
Rinse out thoroughly with clean petrol or white spirits and let dry
forcing some air from an air gun through it.
Clean your inner cable in petrol or white spirits, dry thoroughly and
apply lithium grease sparingly (ball bearing grease as used in the wheel
bearings, this can endure some water). Just a thin coat well worked into
the strands will be sufficient. Needles to say that everything,
including your hands, should be spotlessly clean. That should be all. No
pumping action and oil/grease in the wrong places.
Also make sure you shim out the angle drive (or the standard drive on
the box in other applications) and speedo. There should never be any
load from the inner cable onto the drive or the speedo.
If the clamp ring on the inner cable is on the speedo side, check with
the cable fitted to the speedo: there should always be a little play
up/down with the speedo connected and the angle drive disconnected. Take
measurements at the angle drive side, the male part (cable end should be
shorter than the hole in the angle drive is deep).
If the clamp ring is on the angle drive side apply the same procedure
with the cable fitted to the angle drive.
In short:
Use grease, not oil and make sure that the inner cable can move up and
down a little when fitted in any application. Of course it also should
turn freely and there should be no kinks in outer or inner cable.
Kees Oudesluijs
NL
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