Wood fillers in bumpers

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
mdainsd
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Re: Wood fillers in bumpers

Post by mdainsd » Wed Sep 11, 2019 5:27 pm

Ben Dover wrote:
Wed Sep 11, 2019 9:03 am
Torque Reaction Spring added @ MB Serial 146774, May 1942.
Source please? MB131415 March 27 1942 has its torque reaction spring.
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Re: Wood fillers in bumpers

Post by Joe Gopan » Wed Sep 11, 2019 5:36 pm

Many Jeeps were retrofitted.
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Re: Wood fillers in bumpers

Post by mdainsd » Wed Sep 11, 2019 7:56 pm

Ben Dover wrote:
Wed Sep 11, 2019 5:36 pm
Many Jeeps were retrofitted.
That is not a source, That is a comment. Source please?
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wynnski
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Re: Wood fillers in bumpers

Post by wynnski » Thu Sep 12, 2019 12:48 am

Last night I weighed the Ford style filler I have here and it weighs 3lbs 3 1/2 oz.
It has some very small bits missing and a very small amount of friable wood on one edge where the dry rot has attacked it so it would probably be 3 lbs 4 1/2 oz intact.
I cannot believe that these pieces of filler were made from kiln dried wood, NOT when they were going on a vehicle to be used as the jeep was designed to be used, and knowing the amount of energy needed to kiln dry the wood.
Now if this piece had been made from air dried wood it is highly likely that the weight could have exceeded the 3lbs 14oz limit with that groove NOT machined out.
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Re: Wood fillers in bumpers

Post by YLG80 » Thu Sep 12, 2019 12:51 am

Better resolution and contrast GPW filler drawing
THF405626-GPW-17751_A-1147_FILLER_FRONT_BUMPER_BAR_WOOD-web.png
THF405626-GPW-17751_A-1147_FILLER_FRONT_BUMPER_BAR_WOOD-web.png (202.45 KiB) Viewed 496 times
Ford GPW 164794 1/4T 12-7-43 - Frame# GPW*239762*
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Re: Wood fillers in bumpers

Post by Joe Gopan » Thu Sep 12, 2019 9:19 am

mdainsd wrote:
Wed Sep 11, 2019 7:56 pm
Ben Dover wrote:
Wed Sep 11, 2019 5:36 pm
Many Jeeps were retrofitted.
That is not a source, That is a comment. Source please?
Glad you asked, I still think your Jeep may have been a retrofit

A lot of MB, M-38, M-38A1 and CJ 2A thru CJ-5 Jeeps have crossed my path since the 40's when I first sat in a new 45 CJ-2A and the first surplus WWII Jeeps and trucks we sold and serviced, They were an instant hit and launched the beginning of am longtime MV and Jeep hobby. next were years of servicing new and used Jeeps followed by Army training as a Wheeled Vehice Mechanic. Back then there were a lot of WWII/Korea civilian mechanics with their WII MV experience still fresh in their young minds, the Army instructors were WWII and Korean War types eager to share their WWII Jeep and MV experience.

The source for the Torque Reaction information? I can't actually pinpoint it as it may have come from dozens of sources such as young WWII mechanics with their experience fresh in their young memories, the"NABHOLTZ revised" book, articles from WWII Army Motors, or the Lloyd White massive 5 volume "the Evolution of the Willys Overland MB Jeep" sitting on my coffee table. That set may be expensive, but it is worth every nickel.
This is an exciting hobby, if you are a serious student of the WWII Jeep, Lloyd's books are a must.
Volume 2,Page 45 of LLoyds set explains the A-6157 TORQUE REACTION SPRING KIT from a Service Bulletin dated 1 September, 1942.
I have been very lucky to have been surrounded by my hobby in both Civilian and Military life and enjoy sharing it with all in the hobby.






I
Last edited by Joe Gopan on Thu Sep 12, 2019 1:10 pm, edited 3 times in total.
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Re: Wood fillers in bumpers

Post by dpcd67 » Thu Sep 12, 2019 9:46 am

Depends on the wood species; if made from oak or birch, as indicated above, then it would need the groove to make weight limit.
If made from Poplar, like Joel said his was, then it wouldn't.
Yellow Poplar (actually not a true poplar but that is not important here) weighs only 58 percent of white oak or yellow birch.
Finally, my Forestry degree paid off!
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Re: Wood fillers in bumpers

Post by Joe Gopan » Thu Sep 12, 2019 10:14 am

Two of my neighbors are Forestry Professors at U of Maine, will ask them to confirm my GI Issue filler is Poplar.
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Re: Wood fillers in bumpers

Post by Chuck Lutz » Thu Sep 12, 2019 1:27 pm

Let's stay focused guys, who cares about the Forestry Service anyway? Just use oak for your bumper filler and sleep soundly after you use the drawings provided here to make your own. Then, onto something else and enough of the side bars....
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Re: Wood fillers in bumpers

Post by Joe Gopan » Thu Sep 12, 2019 2:48 pm

Chuck, speaking of bumpers, what do you have for a bumper filler on your Jeep?

And "who cares about Forestry Service?" The Gov't did, who do you think cruised the woods of the US and Canada in search of suitable wood used in the manufacture of our fighting machines.
My good friend Maynard Page was employed by the Gov't during WWII to cruise the U.S. and Canadian woodlands in search of suitable timber for use in the manufacture of plywood used in the manufacture of the Mosquito aircraft.
Last edited by Joe Gopan on Thu Sep 12, 2019 8:52 pm, edited 2 times in total.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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Re: Wood fillers in bumpers

Post by dpcd67 » Thu Sep 12, 2019 2:52 pm

Absolutely no one mentioned the US Forest Service. My comment relates to the earlier one regarding weight of wood and the reason they are hollowed out.
Focus? The thread is on Wood Fillers in Bumpers.
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Re: Wood fillers in bumpers

Post by Joe Gopan » Thu Sep 12, 2019 10:32 pm

I mentioned that I have two neighbors that are Forestry Professors and that I will have Dr. Fields confirm that my GI issue wood bumper filler is made of Poplar.
There are some who are still short on Jeep knowledge that don't know that they don''t know. A little extra Jeep knowlege during discussions is never wasted. Right? :wink: :wink:
Last edited by Joe Gopan on Thu Sep 12, 2019 10:58 pm, edited 1 time in total.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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Re: Wood fillers in bumpers

Post by irakli » Thu Sep 12, 2019 10:38 pm

Thank you guys, now I know the purpose of the groove. Many creative suggestions were expressed before in other threads.
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Re: Wood fillers in bumpers

Post by wynnski » Fri Sep 13, 2019 12:22 am

Hello Farrel
If you have access to the Willys blue print, does it show the recess and if so, does it give the radius as in the Ford picture.

The Ford filler I have here is not made of oak, that much I do know. It actually has a small fleck in the grain that looks like the fleck in european beech, so I assume that it must be birch. The filler is missing a small piece off the end so I will see if I can take a picture of the wood grain and post it up here.

This filler is actually washed over in a grey paint on the inside and painted with what is left of layers of undercoat and then olive drab on the rearward face that is exposed.
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Re: Wood fillers in bumpers

Post by wynnski » Fri Sep 13, 2019 11:47 am

Pictures of the Ford bumper filler
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