The Ford Barn

1930.68B · 04-14-2018, 03:24 PM

I would like to know the correct size of the Model A fan belt. We are using the original generator and water pump pulleys. They are in all the Model A parts catalogs but the shipping doubles the cost of the belt.
Thanks

CarlG · 04-14-2018, 04:26 PM

Bx40

Synchro909 · 04-14-2018, 05:24 PM

Ditto B 40

wrndln · 04-14-2018, 05:32 PM

After looking up B 40 fan belts on eBay, it appears the belt is 43" in diameter. It is strange the B 40 would be 43", verses 40" like the name. Is the correct belt 43"?
Rusty Nelson

Synchro909 · 04-14-2018, 06:00 PM

Quote:

Originally Posted by wrndln

After looking up B 40 fan belts on eBay, it appears the belt is 43" in diameter. It is strange the B 40 would be 43", verses 40" like the name. Is the correct belt 43"?
Rusty Nelson

That sounds weird! One time, when I was too far from another supply, I used a B43 to get me out of trouble. It was as close as I could get. To tension it, the generator was so far out to the left that the belt touched the rubber part lower water outlet near the radiator. I laid a piece of aluminium under the hose clip to prevent it wearing through and replaced the belt some 4,000 miles later.

JOHN CT · 04-14-2018, 07:21 PM

Sponsored Links (Register now to hide all advertisements)

D&D PowerDrive B40 NAPA AUTOMOTIVE Replacement Belt https://www.amazon.com/dp/B00NUQE4I0..._eQP0Ab9R5MV51

This is the belt I got from amazon. It works fine for me. It’s been on for a few years.

CarlG · 04-14-2018, 10:19 PM

The "X" in the part number I mentioned above (post #2) is a cogged belt. The 43" that Rusty referred to in post #4 is the Outside diameter. I suspect that the "40" refers to the inside diameter, although I don't have one handy to measure to verify that.

Tom Wesenberg · 04-14-2018, 10:43 PM

Add things to your parts order, and buy from a dealer so you get the correct belt. The belt angle needs to be correct as well as the width and length. The belt I bought from Bratton's in the 90's for my 28 still looks like new.

Dodge · 04-15-2018, 12:57 AM

The Napa one doesn’t fit very well. I and several othe people have had trouble with it.
The ones I have ordered from Snyders fit perfect.

Manuel · 04-16-2018, 01:52 AM

What about B fan belts. Are they the same as the A?

Manuel in Oz

Badpuppy · 04-16-2018, 05:16 PM

Nope - http://www.biedlers-belts.com/single...r-ii-belt.html

Manuel · 04-17-2018, 11:48 PM

The chart doesn't show makes & models BP. What diameter/size is the B belt?

Manuel in Oz

BILL WILLIAMSON · 04-18-2018, 05:10 PM

To be SAFE, get the one it calls for & one slightly shorter & one slightly longer! It's a LOOOOOONG walk to PEP BOYS!
Bill Tired

ursus · 04-18-2018, 05:40 PM

Quote:

Originally Posted by Manuel

What about B fan belts. Are they the same as the A?

Manuel in Oz

A and B belts are the same size and, the same as used for 1940's era Chevrolets.

Manuel · 04-21-2018, 01:15 AM

Thanks Ursus. Never knew that....

Manuel in Oz

04-14-2018, 03:24 PM	#1
1930.68B Senior Member Join Date: Mar 2014 Location: Canton, IL Posts: 190	Fan belt size I would like to know the correct size of the Model A fan belt. We are using the original generator and water pump pulleys. They are in all the Model A parts catalogs but the shipping doubles the cost of the belt. Thanks

04-14-2018, 05:24 PM	#3
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 8,044	Re: Fan belt size Ditto B 40 __________________ I sometimes wonder what happened to the people who asked me for directions. Even at my age, I still like to look at a young, attractive woman but I can't really remember why.

04-14-2018, 07:21 PM	#6
JOHN CT Senior Member Join Date: May 2010 Location: In my garage Posts: 468	Re: Fan belt size Sponsored Links (Register now to hide all advertisements) D&D PowerDrive B40 NAPA AUTOMOTIVE Replacement Belt https://www.amazon.com/dp/B00NUQE4I0..._eQP0Ab9R5MV51 This is the belt I got from amazon. It works fine for me. It’s been on for a few years. __________________ 31 Tudor 66 Bonneville 57 Chevy pickup 27 T roadster pick up

04-14-2018, 10:19 PM	#7
CarlG Senior Member Join Date: Nov 2010 Location: Anchorage, Alaska Posts: 9,192	Re: Fan belt size The "X" in the part number I mentioned above (post #2) is a cogged belt. The 43" that Rusty referred to in post #4 is the Outside diameter. I suspect that the "40" refers to the inside diameter, although I don't have one handy to measure to verify that. __________________ Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club

04-14-2018, 10:43 PM	#8
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Fan belt size Add things to your parts order, and buy from a dealer so you get the correct belt. The belt angle needs to be correct as well as the width and length. The belt I bought from Bratton's in the 90's for my 28 still looks like new.

04-14-2018, 04:26 PM	#2
CarlG Senior Member Join Date: Nov 2010 Location: Anchorage, Alaska Posts: 9,192	Re: Fan belt size Bx40 __________________ Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club

04-14-2018, 05:32 PM	#4
wrndln Senior Member Join Date: May 2010 Location: Lakeville, MN Posts: 5,300	Re: Fan belt size After looking up B 40 fan belts on eBay, it appears the belt is 43" in diameter. It is strange the B 40 would be 43", verses 40" like the name. Is the correct belt 43"? Rusty Nelson

04-15-2018, 12:57 AM	#9
Dodge Senior Member Join Date: Nov 2011 Location: Sonoma, CA. Posts: 1,568	Re: Fan belt size The Napa one doesn’t fit very well. I and several othe people have had trouble with it. The ones I have ordered from Snyders fit perfect.

04-16-2018, 01:52 AM	#10
Manuel Senior Member Join Date: May 2010 Location: ACT Australia Posts: 536	Re: Fan belt size What about B fan belts. Are they the same as the A? Manuel in Oz

04-16-2018, 05:16 PM	#11
Badpuppy Senior Member Join Date: Dec 2017 Location: Guthrie, OK Posts: 1,247	Re: Fan belt size Nope - http://www.biedlers-belts.com/single...r-ii-belt.html

04-17-2018, 11:48 PM	#12
Manuel Senior Member Join Date: May 2010 Location: ACT Australia Posts: 536	B Fan belt size? The chart doesn't show makes & models BP. What diameter/size is the B belt? Manuel in Oz

04-18-2018, 05:10 PM	#13
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Fan belt size To be SAFE, get the one it calls for & one slightly shorter & one slightly longer! It's a LOOOOOONG walk to PEP BOYS! Bill Tired __________________ "THE ASSISTANT GURU OF STUFF"

04-21-2018, 01:15 AM	#15
Manuel Senior Member Join Date: May 2010 Location: ACT Australia Posts: 536	Re: Fan belt size Thanks Ursus. Never knew that.... Manuel in Oz