Posted: Tue Sep 20, 2016 4:32 pm Post subject: Autolite versus Delco Regulators
Any opinions on whether the 25A 24V Delco "breadbox" voltage regulators as used in the G742 Reo and G749 GMC are interchangeable with the Autolite version that is used on the M38 and M38A1?.
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
Posted: Tue Sep 20, 2016 5:24 pm Post subject:
What numbers are listed in the G742 and G749's and are these numbers
listed in the G740 and M38A1 manuals?
As I understand it the military parts are not identified principally by maker but by the military ID number, meaning if both Autolite and Prestolite units are id'd by the same number they are interchangeable and the military didn't care which one was installed.
If a motor pool guy replacing a regulator had one of each on the shelf and
they both had the same number he'd grab the nearest one.
No. (Edit 9-21: They are not the same stock # or ORD#.) The motor pool guy would have tried to keep like parts in with like parts. In other words if you have a Delco generator then stay with a Delco regulator.
I don't have a copy of the Canadian parts manuals but something doesn't sound right BCA. The US M38 & M38A1 ORD 9's list both Autolite & Delco Generators but only list the Autolite Regulator however the M38 & M38A1 ord 7 or 8's both offer both the Delco and Autolite regulators and list the mount brackets for the Delco's. So if you are referring to the Delco regulators PN 1118546, 1118606 or 1118656 they can all be used with the 25Amp system M38's and M38A1's/M170's. They are used with Mount brackets 7539614.
Also more info can be found in the late m38A1 parts pubs TM9-2320-208-20P & TM9-2320-208-34P _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Joined: Jun 17, 2012 Posts: 159 Location: Minnesota
Posted: Wed Sep 21, 2016 6:54 am Post subject:
Sorry Wes, I have to disagree. I spent a lot of time in a many motor pools. Over 30 years. It didn't matter one iota what brand a part was as long it was a suitable part. GIs and the military could care less what brand the part was.
Dan _________________ Dan Schultz
MD20035 9/1952
MC70324 dod 6/52
GPW 14944 dod 4/10/42
K38 Linemans Trailer 4/43
M100 Trailer 01177488 dod 8/51
I ask this question because Autolite regulators are scarce but there are
Delco regulators that can be taken off old GMC G749 M211's and old Reo M35 G742's. I know in perfect world that you'd like to use matching brands. I suspect that they are technically interchangeable. I will do some more digging in the G740 and G758 parts books and see what I can come up with.
BCA they are interchangeable keeping in mind that the Delco needs it's own mounting legs (bracket) as I listed above. As I said above they are listed in the ORD 7 & 8's and they can be mix and matched but I do not prefer to do that.
Also more info can be found in the late m38A1 parts pubs TM9-2320-208-20P & TM9-2320-208-34P _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Dan S you are disagreeing with the wrong guy. I also spent my 22 years as a military mechanic and yes as long as the stock number or ORD # was the same we used them with no regard to brand or color.
In this discussion the Stock Numbers and ORD #'s are not the same. With electrical components my personal preference is not to mis match _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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