The Ford Barn

JJASON · 01-11-2018, 06:30 AM

What is a Napa brand fan belt number,that will fit on my Model A?

pgerhardt · 01-11-2018, 08:32 AM

IDK. It depends on which generator/alternator you are running, but the size IS important. If it is too small you will have a h*ll of a time getting it on. If too long the generator/alternator pulley will rub against the lower radiator hose when you tighten it up.

If you are running a stock generator I would get one from one of the model A parts vendors. They will have the correct size. In my case I have one of those Powermaster alternators that look like a stock generator. This belt was the correct size for me.

Jwilli · 01-11-2018, 09:59 AM

Running stock generator it is 43 inches long and 5/8 outside width. All venders have them. Hope this gives you a starting place to find one.

duke36 · 01-11-2018, 10:54 AM

Check with Rockauto; they have 3 types listed with specs, all notched, that supposedly run cooler (and may be easier to install under crank pulley). We use a Gates TR22425 w/ an alternator.

fuzes45 · 01-11-2018, 03:23 PM

Napa Fan Belt saw on one A 25-20246

2manycars · 01-11-2018, 05:14 PM

Sponsored Links (Register now to hide all advertisements)

Gates BX40

Purdy Swoft · 01-11-2018, 05:44 PM

Once the correct belt is found It is much easier to remove the generator pulley for ease of removal and replacement of the belt . Remove the pulley bolt and find a slightly longer bolt. Install the longer bolt so that it bottoms in the armature, this will protect the threads . While holding outward tension on the pulley, lightly tap on the bolt and the pulley will release from the taper of the armature shaft .

JJASON · 01-11-2018, 05:57 PM

Mine has the alternator. Any parts numbers from parts stores I can use???

1931 flamingo · 01-11-2018, 06:14 PM

I've got an alt and the BX40 rings a bell.
Paul in CT

duke36 · 01-11-2018, 06:17 PM

see post 4

duke36 · 01-11-2018, 06:37 PM

If you go to Napa, ask for .604 to .63" width; outside circum. 42.59 to 42.9" similar to post 3..
Cogged (notched) type may be easier to get under crank pulley.

GPierce · 01-11-2018, 07:00 PM

This NAPA belts slides on the alternator pulley without the need to remove the pulley.

Railcarmover · 01-11-2018, 08:58 PM

The 'B' belt is an industrial drive belt,not as hard as an automotive spec..they grip better and you dont have to run them as tight..save your water pump..

01-11-2018, 06:30 AM	#1
JJASON Senior Member Join Date: Jun 2014 Posts: 110	Fan belt What is a Napa brand fan belt number,that will fit on my Model A?

01-11-2018, 08:32 AM	#2
pgerhardt Senior Member Join Date: Jul 2014 Location: Danbury Ct Posts: 1,254	Re: Fan belt IDK. It depends on which generator/alternator you are running, but the size IS important. If it is too small you will have a h*ll of a time getting it on. If too long the generator/alternator pulley will rub against the lower radiator hose when you tighten it up. If you are running a stock generator I would get one from one of the model A parts vendors. They will have the correct size. In my case I have one of those Powermaster alternators that look like a stock generator. This belt was the correct size for me.

01-11-2018, 09:59 AM	#3
Jwilli Senior Member Join Date: Apr 2014 Location: Kennesaw, Ga Posts: 511	Re: Fan belt Running stock generator it is 43 inches long and 5/8 outside width. All venders have them. Hope this gives you a starting place to find one.

01-11-2018, 10:54 AM	#4
duke36 Senior Member Join Date: Jun 2015 Posts: 1,414	Re: Fan belt Check with Rockauto; they have 3 types listed with specs, all notched, that supposedly run cooler (and may be easier to install under crank pulley). We use a Gates TR22425 w/ an alternator.

01-11-2018, 03:23 PM	#5
fuzes45 Member Join Date: Nov 2016 Location: Corrupt-A -Cut Eastern,Ct Posts: 54	Re: Fan belt Napa Fan Belt saw on one A 25-20246

01-11-2018, 05:14 PM	#6
2manycars Senior Member Join Date: May 2010 Location: Eastern CT Posts: 2,732	Re: Fan belt Sponsored Links (Register now to hide all advertisements) Gates BX40 __________________ Bill www.brauchauto.com

01-11-2018, 05:44 PM	#7
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: Fan belt Once the correct belt is found It is much easier to remove the generator pulley for ease of removal and replacement of the belt . Remove the pulley bolt and find a slightly longer bolt. Install the longer bolt so that it bottoms in the armature, this will protect the threads . While holding outward tension on the pulley, lightly tap on the bolt and the pulley will release from the taper of the armature shaft .

01-11-2018, 05:57 PM	#8
JJASON Senior Member Join Date: Jun 2014 Posts: 110	Re: Fan belt Mine has the alternator. Any parts numbers from parts stores I can use???

01-11-2018, 06:14 PM	#9
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: Fan belt I've got an alt and the BX40 rings a bell. Paul in CT

01-11-2018, 06:17 PM	#10
duke36 Senior Member Join Date: Jun 2015 Posts: 1,414	Re: Fan belt see post 4

01-11-2018, 06:37 PM	#11
duke36 Senior Member Join Date: Jun 2015 Posts: 1,414	Re: Fan belt If you go to Napa, ask for .604 to .63" width; outside circum. 42.59 to 42.9" similar to post 3.. Cogged (notched) type may be easier to get under crank pulley.

01-11-2018, 08:58 PM	#13
Railcarmover BANNED Join Date: Apr 2017 Location: Sacramento Posts: 1,262	Re: Fan belt The 'B' belt is an industrial drive belt,not as hard as an automotive spec..they grip better and you dont have to run them as tight..save your water pump..