Alternator and engine fan question
Thread Starter
Burning Brakes
Joined: Oct 2007
Posts: 978
Likes: 69
From: Hong Kong, Perth, Western Australia
Alternator and engine fan question
Guys
Correct me if I'm wrong here - I have a query about the alternator/engine fan/ pulley assembly.
The alternator shaft needs to spin to enable it to function - in this case to re-charge the battery. The engine fan sits around the alternator shaft via the fan hub bearing. The engine fan is then bolted onto the pulley shims, and the engine fan will spin as long as the the engine fan belt is intact and is being powered by the engine crank pulley.
But the engine fan bearing hub, nor the belt shims are connected to the alternator shaft in any way. They can spin freely of each other. So how does the alternator shaft spin - if it is not tied to the pulley in any way ?
Correct me if I'm wrong here - I have a query about the alternator/engine fan/ pulley assembly.
The alternator shaft needs to spin to enable it to function - in this case to re-charge the battery. The engine fan sits around the alternator shaft via the fan hub bearing. The engine fan is then bolted onto the pulley shims, and the engine fan will spin as long as the the engine fan belt is intact and is being powered by the engine crank pulley.
But the engine fan bearing hub, nor the belt shims are connected to the alternator shaft in any way. They can spin freely of each other. So how does the alternator shaft spin - if it is not tied to the pulley in any way ?
Thread Starter
Burning Brakes
Joined: Oct 2007
Posts: 978
Likes: 69
From: Hong Kong, Perth, Western Australia
I had three belts when I was running the standard setup.
When I ran the RS hub I had only two.
With the SC I have two as well.
But there is still nothing connecting the hub, fan, or belt shims to the shaft. The crank shaft on the other hand has a pin that locks the crank pulley to the shaft. I looked at the PET and there is definetly no pin for the alternator shaft to the fan or pulley.
I know it all works - and I am assuming that the hold on the shaft by the shims is tight enough to keep the alternator spinning.
When I ran the RS hub I had only two.
With the SC I have two as well.
But there is still nothing connecting the hub, fan, or belt shims to the shaft. The crank shaft on the other hand has a pin that locks the crank pulley to the shaft. I looked at the PET and there is definetly no pin for the alternator shaft to the fan or pulley.
I know it all works - and I am assuming that the hold on the shaft by the shims is tight enough to keep the alternator spinning.
Thread Starter
Burning Brakes
Joined: Oct 2007
Posts: 978
Likes: 69
From: Hong Kong, Perth, Western Australia
No matter what type of hub you use - they all sit around the alternator shaft and are not directly locked to the rotation of the shaft itself.
So logically - the fan will move - but how does the alternator shaft move?
This is what I'm trying to get at.
Might it be the contact from the friction from the shalf bolt on the front of the pulley.
So logically - the fan will move - but how does the alternator shaft move?
This is what I'm trying to get at.
Might it be the contact from the friction from the shalf bolt on the front of the pulley.
