The Ford Barn

howie123 · 09-25-2010, 04:27 PM

I just installed a new 6volt positive ground alternator from Nurex in my Model A speedster. Fan is 4 blade truck fan. Water pump is new leakless type. After installing the alternator there is a noise that was not there with the generator. It is a ticking noise that seems to come from the area of the fan. The belt appears to be running true with no noticeable wobble although I don't know how I would check it accurately. The fan is not touching anything that I can see. The alternator appears to be working according to the ammeter. Any thoughts would be appreciated. Thanks. Howie

pdora · 09-25-2010, 05:21 PM

Is the belt tension different from before?

MikeK · 09-25-2010, 05:27 PM

This is a case where a tool that most guy's don't have is invaluable. A variable speed strobe light. If you can borrow or get one you will be able to 'see' what part seems to stand still at the clicking speed. The alt pulley &fan, the belt, the water pump pulley, all have a different time base. Just be careful. Things will look like they are not moving, but they are!

1931 flamingo · 09-25-2010, 07:39 PM

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Amazing how a stobe can mess with your mind, ezpecially in a dark room, black lights and many, many bottles of your favorite brew......many, many, many years ago.
Paul in CT

09-25-2010, 04:27 PM	#1
howie123 Senior Member Join Date: Jul 2010 Location: Eau Claire, WI Posts: 113	Alternator installation I just installed a new 6volt positive ground alternator from Nurex in my Model A speedster. Fan is 4 blade truck fan. Water pump is new leakless type. After installing the alternator there is a noise that was not there with the generator. It is a ticking noise that seems to come from the area of the fan. The belt appears to be running true with no noticeable wobble although I don't know how I would check it accurately. The fan is not touching anything that I can see. The alternator appears to be working according to the ammeter. Any thoughts would be appreciated. Thanks. Howie

09-25-2010, 05:21 PM	#2
pdora Senior Member Join Date: Jul 2010 Location: Rutledge, Georgia Posts: 184	Re: Alternator installation Is the belt tension different from before? __________________ Peter A. Dora -- Rutledge, GA (AE4XH)

09-25-2010, 05:27 PM	#3
MikeK Senior Member Join Date: May 2010 Location: Windy City Posts: 2,919	Re: Alternator installation This is a case where a tool that most guy's don't have is invaluable. A variable speed strobe light. If you can borrow or get one you will be able to 'see' what part seems to stand still at the clicking speed. The alt pulley &fan, the belt, the water pump pulley, all have a different time base. Just be careful. Things will look like they are not moving, but they are!

09-25-2010, 07:39 PM	#4
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: Alternator installation Sponsored Links (Register now to hide all advertisements) Amazing how a stobe can mess with your mind, ezpecially in a dark room, black lights and many, many bottles of your favorite brew......many, many, many years ago. Paul in CT