M38 fan belts

jackthebear46 · Post by **jackthebear46** » Sat Apr 02, 2011 7:43 pm

Does anyone know part #'s for M38 fan belts from NAPA or Gates or...?
Thanks

Post by **wesk** » Sun Apr 03, 2011 12:50 am

There are several part numbers floating around and listed in the Spence cross reference.

Gate's 7460 (7/16" x 46")
Goodyear 13T461 (13/32" x 46.1")
Dayco (Dayton) 15455 (15/32" x 45.5")
NAPA 25-11683
Durkes-Atwood 13-462

These numbers have changed over the years and appear in several formats but the bottom line is the belt size:
.44" or 7/16" or 15/32" belt width at the top and a length from 45.5" to 46.0"

Mike Seymour made the NAPA trip a while back and came home with a 25-7448 (7/16" x 44.8") that he said fit perfectly and left plenty of room for adjustment.

jackthebear46 · Post by **jackthebear46** » Sun Apr 03, 2011 7:51 am

Thanks, Wes! This is sure a great website, with all the info & knowledge that is available.
Thanks again.

brachus12 · Post by **brachus12** » Mon Apr 02, 2012 6:04 am

Wes - where are you getting those dimensions? When I look up those parts on the NAPA site, they aren't matching up. I can't seem to fine any that are actually .44 wide

Part Number: NBH 257448
Product Line: NAPA Belts & Hoses
Attributes:
Belt Angle : 36 Deg
Notched Belt : Yes
Outside Circumference (in) : 45.33"
Outside Circumference (mm) : 1151 mm
Section : HC41
Top Width (in) : .41"
Top Width (mm) : 10 mm

Post by **wesk** » Mon Apr 02, 2012 9:05 pm

You're asking a lot of this old fart. That was a year ago. As I read it today they are presented as a range of sizes and not any one specific size except those first three named brands with part numbers and those sizes came from those listing. Actually if you go to the:
M38 TM 9-8012 under cooling system they are much more detailed in their assessment of the size stating width-3/8" and outside circumference 45 7/8".
The M38 earlier TM 9-804 lists width as 3/8", gives no length but shows angle 40 Degs.
The M38A1 TM 9-8014 only lists the width at 3/8".
The very early M38A1 TM 9-804A lists width 3/8" and angle 38 Degs and calls it a vee-wedge cogged belt.
M38's 51 ORD 9 Ord# 7697614 WO# 801699
M38's 55 ORD 9 Ord# 7697614 and show an optional WO# 806764
M38's 56 ORD 7 Ord# 590897 7/16" top width x 38 Deg's x 45 5/8" outside circumference.
M38's 56 ORD 8 Ord# 590897 Same measurements and also list a 3 belt set Ord# 8699837 which would go on the 100 amp alternator kit.
M38A1 56 ORD 9 Ord# 7697614, Day Rubber # S5203, WO# 801699 and as optional it lists Firestone # NDD153 with WO# 806764.
M38A1's 52 ORD 7 Ord# 590897 as a belt set of 2.
M38A1's 1959 TM 9-2320-208-20P lists only the alternator 3 belt set Ord# 8699837.
M38A1's 1966 TM 9-2320-208-20P lists Ord# 590897, FSN 3030-505-5893 2 belt set 7/16" top width x 38 Deg's x 45 5/8" outside circumference. and the alternator 3 belt set Ord# 8699837.

Hows that for a little variation in numbers!