[encantotom]

does anyone know the rpm's for the hydraulic radiator fan in the high and low speeds?

thanks

tom

[DogKnots]

I know this is an old thread (3-ish years old!), but I don't see an answer and I'm kinda wondering the same thing.
My radiator fan seems to turn slowly even when the coolant is around 190 F and fast idle is set.
I don't know how you select "HIGH" vs "LOW" speed for the fan…I don't see a switch anywhere on my dash.
I also don't know how you would measure the rpm of the fan.
Any advice is appreciated.
I've got a 1999 S60 #510
Thanks,
Jonathan

[qcj]

I don't know the RPM, but I do know that when I was standing behind the engine with the rear engine compartment open it blew my hat off when it came on.

[folivier]

Jonathan if you look at the control block where the hydraulic hoses go through near the fan there is a wire plug that controls the hi/lo speeds. If you disconnect this while the engine is running it should switch the fan to high speed. Other than that I don't think there is a switch anywhere since it's controlled by that relay thermostatically.

[Yachts]

Foliver speaketh the truth

[LynnJeff]

Chappell

Just trying to get an idea of velocity

Would that be a Sam Spade hat or a cowboy hat

[encantotom]

i bought an rpm counter to check it but never did....ha

tom

[jdkskyking]

I’m about to get waste deep in a fan speed issue… I’ll let you know what I find out.
JK