Is a Regulator VBC4004UT interchangeable with VBC4002UT

lilm38 · Post by **lilm38** » Sat Apr 08, 2023 7:05 pm

Ok I finally have time to get back to this for a few days. The mounts that I have on my frame must have been moved at some point because the splash plate I just got doesnt come close to lining up with the bracket holes.

http://www.willysmjeeps.com/v2/modules. ... _photo.php

http://www.willysmjeeps.com/v2/modules. ... _photo.php

http://www.willysmjeeps.com/v2/modules. ... _photo.php

http://www.willysmjeeps.com/v2/modules. ... _photo.php

Post by **wesk** » Sat Apr 08, 2023 8:02 pm

I have several marked photos in my album.

lilm38 · Post by **lilm38** » Sat Apr 08, 2023 9:48 pm

Ok.Thanks Wes. Looks like there are two different types of mounts. I have the brackets for the regulator that has threaded holes on the underside and my regulator has the mounting holes in flanges on the side. I havent found anyplace that has those brackets.

Post by **wesk** » Sat Apr 08, 2023 11:39 pm

There are a few different mounts but the M38 had one only and the M38A1 had one only. Your mount has welds that are not factory. So someone has toyed with your mount for some odd reason we will never know. Did you visit my photo album and review all the regulator mount photos?

lilm38 · Post by **lilm38** » Sun Apr 09, 2023 10:50 am

Thanks Wes. I have two different regulators. A 4004UT and a 4002UT. The pics on page 1 of this thread show both units and both mounting brackets. One is for the 38 and one is for the 38A1. The Prestolite regulator 4004UT I had been using (shown without its cover) was overcharging the batteries so I got a new 4002UT which has different brackets. I need the dimensions of the two rectangular metal strips that attach to the splash shield (as shown in Wes' pic above) and I will make them out of flat stock steel.

Post by **wesk** » Sun Apr 09, 2023 6:54 pm

This is the M38's proper arrangement:

The two brackets you need are the the two in the photo with the rubber shock mounts and two short braided ground straps. The part number for these two brackets is ORD# 7374823, Willys# 118757, Auto-lite # VBC43, FSN 2920-737-4823. The 4 shock mounts are also available on the market 7374922. The 4 short ground straps are not out there. You can buy the strap bulk, cut to length, solder copper plates on each end and drill for proper stud size.

Here's the VBC4002UT installation shown in the 1951 ORD 9 SNL G-740 M38 parts manual.

lilm38 · Post by **lilm38** » Mon Apr 10, 2023 2:55 am

Perfect. As always you have the answer. Thank you Wes.

45auto · Post by **45auto** » Mon Apr 10, 2023 5:20 pm

Army Jeep Parts has the short ground straps for the 4 rubber mounts. A bit pricey if you need 4 of them................

https://www.armyjeepparts.com/p-4280-gr ... 18755.aspx