Horton clutch fan

No not always .
It depends how the oem has the selinoid wired. It could be commanded on with ign switch in the off position.
Depends on manufacturer. Some do some Don't.

 

Horton Drivemaster fan hub is spring apply, air release so shouldn't spin at key off. do simple test, run engine and engage manual fan switch at 1500 rpm should hear the fan cut in if working correct.

 

On my 9" Horton it is air apply, so when it is out of air the fan spins. When air is up with key off, fan is locked on. I guess it depends what sort of Horton he's got.

 

clear as mud, ain't it

 

Yeah well I just rebuilt mine, so anything yah wanna know....

 

That pssht noise is the power to the solenoid being turned off,and air exhausting.

 

It's not that hard to put a kit through it but you need a bearing press. On my 9" which is different to yours the rear small bearing had collapsed and most of the rollers were missing so I got it just in time. Bear in mind if the bearings collapse it wouldn't take much for it to go through the radiator. I've seen it happen. Sure it isn't the fan belts screeching?