According to this
http://www.peachparts.com/shopforum/diesel-discussion/189747-viscous-fan-oil-viscocity.html
it's supposed to be 10,000CST.
Hendrik
who might have to investigate his fluid coupling
On 08/03/13 12:13, Max Dillon wrote:
If you remove the bi-metallic strip and the pin, you can add oil through the
hole the pin came from.
I used 3000 cps viscosity silicone oil, got a really small bottle at a hobby
store. They sell it for remote controlled car differentials. I think the cost
was $10 or so.
I found the best way to introduce the thick oil into the small hole was to heat
the clutch assembly with a heat gun, then allow the oil to be drawn in as the
fan cooled. Someone posted on the Web somewhere the fill capacity; if you
exceed that and overfill, the fan may be locked on even when cold.
You can test the fill level on the bench if you clamp the clutch in a vice and
test how hard the rotation is when heated with the heat gun versus when cold.
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