Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
Never in my 25+ years in the automotive industry have I seen a selectable, "on/off" fan engagement mechanism. Not to say it doesn't exist (seems like the 939 series 5 tons have some kind of fan thingie someone was telling me about), but I've never seen it.
You have:
Thermotstatic fan clutches...