Pictoral differences found on G4112 vs G506 (more images)

[forestry4evr]

Here's a modest subtle difference between the early and late trucks...
My '42 has flat head machine screws attaching the grill to the radiator support...
IMG_4698-1.jpg
My '45 doesn't have the countersinks in the grill...
IMG_4699.jpg

That's a good catch Jon. Interesting to note that both of your grilles are also of the straight non-
serpentine style. The straight grille on my 10/42 truck did not have the countersunk holes. It appears as though for a very short time in production somewhere perhaps between 6/42-10/42 a truck could have a straight grille but with countersunk attachment holes. Ah the mystery of what truck would have had which grille just keeps going...

[Joe Gopan]

The similar grill setup on CCKW had Flat Head (Countersunk) Screws attaching the radiator guard on early 1941 1st Series. I will check the TM-10 and SNL Parts manuals for both for details (especially on the G-506.)

[forestry4evr]

The similar grill setup on CCKW had Flat Head (Countersunk) Screws attaching the radiator guard on early 1941 1st Series. I will check the TM-10 and SNL Parts manuals for both for details (especially on the G-506.)

Yeah the plot thickens huh? Thanks Joel, it would be great to have some good documentation. I am not a G508 guy, did the grilles on those trucks change similarly through the years of production like the G506? With a little work here, we may be able to get an accurate month/year of a G506/G508 just from a quick glance at a grille. Reminds me of the old TV show "Name That Tune"...how the heck could some people name a tune with just one note?

[Joe Gopan]

Am going to start with my CCKWX TM-10 Parts manual and try to find some 3/8" Flat Head Screws listed in the Hardware Section, will try to do the same in the 1941 dated TM-10 Parts Manual for the Chevy. Early, but not all 1941 CCKWX had counter sunk grills, and yes, the CCKW's had three or four or more grill bar changes. I have a feeling that on the chevy as well as the CCKW that the hardware for these configurations may have only been listed in the Parts manuals that matched the dates of these trucks. It might take me a couple days. It would be real nice if the CCKWX and Early Chev had the same part number for those flat head screws.

[gerrykan]

Kind of odd that the later versions had spare tire locks as trucks by 1943 didn't even have a keyed ignition switch any longer?!

Did the rubber shortage possibly have something to do with this addition?

[Joe Gopan]

NOTE:
Keep this CHEVROLET 4X4 Part Number in your memory.

114672, 3/8"-16x1" Flat Head Screw. I haven't found a G506 home for it, but it is in TM10-1126, dated Sept 41.
I'll bet it is the screw for the countersunk Radiator Guard.

[forestry4evr]

NOTE:
Keep this CHEVROLET 4X4 Part Number in your memory.

114672, 3/8"-16x1" Flat Head Screw. I haven't found a G506 home for it, but it is in TM10-1126, dated Sept 41.
I'll bet it is the screw for the countersunk Radiator Guard.

I just looked up the screws in my November 1940 Chevrolet G4112 parts manual (not a TM but a first edition parts manual from Chevrolet). It lists the same part number:
Flat Slotted Head Bolts, 114672, 3/8-16x1

I cant think of this flat head bolt being used anywhere else on a Chevy other than the grille.

It would be interesting to see how it is listed in the later 1943+ parts manuals.

[forestry4evr]

Kind of odd that the later versions had spare tire locks as trucks by 1943 didn't even have a keyed ignition switch any longer?!

Did the rubber shortage possibly have something to do with this addition?

That's a good point, perhaps once the Japanese controlled many of the rubber tree islands the threat of tire theft increased.

[Joe Gopan]

That 114672 Flat Head Screw has to be it. Early 41 CCKW had Flat Heads ob the Grill too, and i've read all my TM 10 and SNL parts books with no luck. I can't find my prize CCKWX Parts Manual(I put it in a safe plac) and if the Flat Head CCKWX Screw is listed anywhere, it should be anywhere. Those who editited these manuals did it all without computors.

[forestry4evr]

Hey all,

The other day I was rummaging around in one of my spare parts stashes and noticed yet another difference in the early G-4112 YP series Chevy trucks. One of the headlight retainer rings from an early 1941 truck is constructed out of brass. At first glance it looks like any other steel headlight retainer ring, just constructed from a different metal. It appears as though brass was not quite as strategic at that point in time.


Image of 1941 G-4112 headlight retainer ring.


Image of close up of ring above with a wire brushed section revealing brass. Ring is not magnetic so it is more than just brass plating.

Paul

[waayfast]

Wow that is interesting, will have to investigate one of my older trucks, maybe it is brass as well.
This older truck has a different style of the small "marker' light (catseye) light in that the lens is round and flat faced as opposed to all the others I can remember seeing that have the small rectangular lens.
Can anyone shed some light on this style light? Any idea as to how old this type light makes this truck?
Jim

[gyknot]

Thats what is referred to as the blue louvre style blackout marker light. At least that is what they are called on the dodge. My WC1 1/2 ton has the same style except the housing is mounted off the side of the headlight at an angle. Should have a louvre plate inside as well as a blue plastic lense unless its been taken out. They are being reproduced now.
As far as I know they were only on prewar rigs but I do not know when the change was made to the later common marker light.

[waayfast]

Thanks for the info. This truck is early, just not sure how early. Has the square civy instrument panel. Bought it for parts. Previous owner lost the title and had Idaho Dept of trans come out do an inspection to generate a title for it.

OPPS! It is officially titled as a Dodge thanks to the "expert"

[forestry4evr]

Jim,
It would be awsome if you could post some images of your early louvred blackout lights as it would certainly add to this thread. It is my understanding that those lights were installed on mostly prewar models and were largely switched over to the cats-eye type for consistency in night time convoy driving. Ever try to drive one of these beasts with just the blackout lights? I would be just as good driving with my eyes blindfolded, even with the blackout drive light! I guess the eyesight of a teenager makes a difference.

Just out of curiosity, I dropped the headlight retainer in a crockpot to get the paint off of it for a little closer inspection. BTW, a crockpot set on high for a few hours is a fantastic low effort method of removing paint on small and or delicate metal parts. CAUTION: DO NOT use your wife's crockpot as it will really piss her off! Often a good useable crockpot can be purchased for $5 or less at a second hand store or yard sale, it will avoid a lot of hassle at the homefront, trust me!

Anyway, below is the result:


Image of a brass and steel head light retainer ring. Sorry for the upside down image...Ron's photo image editor doesn't seem to work this morning...this image was not taken in Australia. The presumed older brass retainer ring looks to be an exact duplicate of the more common steel version also shown.


Image comparing paint colors. Note that the remnant paint on the older brass retainer ring is darker than the later retainer ring. Contributing evidence as to age anyway.

Hope you all enjoy, and hope you all have some time to go out and play with your trucks!

Paul

[forestry4evr]

Here are some images of a early blackout light I am posting for Jim "waayfast", removed from the early G4112 truck also pictured. Jim I doctored up some of the images to improve visibility.








Also notice the winch bumper arrangement on the G4112 trucks