>
>In a message dated 4/27/1999 2:47:19 PM, tbye@grm.hia.no writes:
>
><<what kind of oil to use on shock absorbers>>
>
>I've successfully used motor cycle fork oil. I specifically
>recommend Harley-Davidson brand, but others would probably
>be useable. The fork oil seems to be very resistant to leaking.
>
There are many grades of motorcycle fork oil made by the major companies
designed to allow for all eventualities, you would need to go to a
performance or off-road specialist to find these.
It is possible to use quite common oils in the old type re-fillable
shock-absorbers, Ford CMP's actually specify SAE 30 engine oil, you can
recover the performance of worn piston type shocks by using thicker oil
and in severe cases I have found 90EP to be a complete cure. . . . . . .
.
Most shocks take very little oil and its all mineral based so there are
no basic compatibility problems, if there is some of the current oil
available you can compare viscosities using a simple small orifice in a
container and measuring the time for a measured sample to drip through
and then select a fluid with a similar characteristic.
It would seem that most twin piston lever shocks use something between
SAE 8 and 30 depending on the application.
Richard
(Southampton UK)
===
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