Building a 42WLA Blank Boss Engine in a Crate

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17thAirborne
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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Tue Aug 01, 2017 8:42 pm

matt506 wrote:
Tue Aug 01, 2017 4:32 pm
If you can wait I was getting original sprockets out of the crate in bags for 10 bucks. I will see him in Davenport in a few weeks. Might also have a oil pressure switch for you too. matt
I will definitely wait for those items. Won't need them till the end so we have time. Thanks for offering to help.
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by Michael Browne » Thu Aug 03, 2017 5:24 pm

17thAirborne wrote:
Sat May 27, 2017 8:17 am
Today I removed the old races from the connecting rods. It was very easy. I stacked a 38mm and a 42mm ram together so that the smaller would fit inside the race with clearance and the larger would fit over the race, but inside the connecting rod race recess. They pressed right out with a nice "ping" ala Garand en block ejection.
Here is the process in images.

Rams for the 12-ton press.

s-l500.jpg

Ram going in

IMG_4031.JPG

Completed press on one side of the Fork

IMG_4032.JPG

Both races removed from fork

IMG_4033.JPG


These should clean up nicely and allow for the new races to be installed when next I go visit Bill. We will probably hone the rods to a bit under the OD of the races, press them in and then hone to correct ID for new bearings.
One thing to be careful of is pressing the bearing races out of the split rod (fork) with no support on the split. Too may rods get ruined by crushing the split. Best to fit a pushing plug into the split and push the lower side out with full support under the rod.

edit, pictures didn't copy across??

Good luck
Michael Browne

REAL jeeps have FLAT FENDERS AND BAR GRILLES not much else comes close

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Thu Aug 03, 2017 5:49 pm

for the pressing in we built a shim to fit between the two race recesses. It was turned on a lathe and worked great. You do make a great point
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Sat Aug 05, 2017 6:26 pm

Masked the cases for painting. I checked a few period images before deciding what to mask and not. It looks like they painted with the two oil pumps on, but mine are still in need of cleaning, so I used an old gasket.
masking 2.jpg
masking 2.jpg (197.31 KiB) Viewed 144 times
masking 1.jpg
masking 1.jpg (151.07 KiB) Viewed 144 times
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Sat Aug 05, 2017 6:43 pm

Painted. Color looks a bit more of the early variety. :shock:
It will be just fine for the crate though.
painted 1.jpg
painted 1.jpg (197.15 KiB) Viewed 144 times
painted 2.jpg
painted 2.jpg (172.25 KiB) Viewed 144 times
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808


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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Sun Aug 06, 2017 1:13 pm

Here are a few self-critiques:

1. The boss where the engine No. goes should be masked off prior to painting.
2. It looks like some crated engines were painted with all engine case screws, rods and nuts installed leaving them OD
3. Should be painted with the oil pump, scavenger pump and the valve guides in place
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Tue Aug 08, 2017 7:49 pm

I started on the crate today. I am unable to work off of exact original dimensions as the two examples are not accessible to me. One museum curator gave me some very rough dimensions. The exact measurement was the depth of the crate at 14". The height and width were not exact and the distances between the components which hold the engine were estimates through Plexiglas.

Given these limitations i decided to work from scratch...sort of.

1. The depth of the crate is 14" and each crate seems a bit different with regards to the number and width of the individual boards used to make the panels. I used the following combination of four boards to arrive at 14"

one 1 x 6 (actual dimensions 0.75" x 5.50")
one 1 x 4 (actual dimensions 0.75" x 3.50)
two 1 x 3 (actual dimensions 0/75 x 2.50)

total actual board width = 14.00"

The width is about 26" so I cut my boards to 28" length and glued them together and clamped them. When I am done with the mock up, and know where everything should go I will cut the two ends to the proper length and get them nice and square.

The two motor mounting flats on the engine are at different heigths from the bottom of the motor. They are at 1.75" from one another on the horizontal plane. I gave about 0.50" clearance for the bottom of the engine.

I cut one 2 x 6 (actual dimension 1.50" x 5.50") to 4.50" in height and 14" long to match the crate depth.

The other I cut to 6.25" from a 2 x 8 (actual dimension 1.50" x 7.50")

Here is the result so far"
motor mount 2.jpg
motor mount 2.jpg (163.33 KiB) Viewed 101 times
The generator pad near the lower motor mount juts out farther from the case than the lower motor mounting pad than the two bolt holes, so it is necessary to cut a notch in the mounting block to allow the generator pad to slide over the mounting block. I will post my dimensions after I make this cut. Upon examining o very small resolution image I can see where the original crate mounting block was cut in this fashion also. A straight notch.
motor mount 1.jpg
motor mount 1.jpg (134.99 KiB) Viewed 101 times
Once I am done with this I can obtain the exact dimention between the two mounting blocks, and given the size of the NOS carburetor box that fits in the slot to the side of the engine mounting block, I can determine the remaining dimensions. I'll post progress later.
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Tue Aug 08, 2017 8:41 pm

Here is the notch cut out of the short motor mount block. It is 5.00" wide and 0.625" from the top.
motor mount 3.jpg
motor mount 3.jpg (153.85 KiB) Viewed 98 times
I set my carburetor box next to the tall motor mounting block to measure the panel side cut. The box is 5.75" wide, so i added just 1/8" to account for fit and making it 5.875". The side panel and its box frame (see images of the crate rendering) are each 0.75" thick, so I need to add 1.50" to the end for one cut. These both sit on TOP of the bottom panel
motor mount 4.jpg
motor mount 4.jpg (205.63 KiB) Viewed 98 times
crade side panel.jpg
crade side panel.jpg (78.17 KiB) Viewed 98 times
The space on the other side of the crate opposite the carburetor space is slightly smaller than the carb space, but I have no known dimension. I am using 4.625" My total panel width will be a round 26.00"

LS panels 1.50 + LS panel gap 4.625" + short mount block 1.50" + space between both mounting blocks 9.50" + tall motor mount block 1.50" + carb box space 5.875" + RS panels 1.50" = 26.00"
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Wed Aug 09, 2017 7:11 am

Here are some more details
crate details 1.jpg
crate details 1.jpg (206.7 KiB) Viewed 87 times
Oz

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WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by matt506 » Wed Aug 09, 2017 8:01 am

Oz, oops
Got the crate dimensions and such thanks. I had them before but I run a MAC computor so it would not show until I downloaded it on a PC. Looking totally awesome! Learning alot. I should be cutting wood following right behind you next week. Going shooting for the Army this weekend so that puts me behind.
I have two rebuilt M88s but I do not thinkt I will find a nos box one. I have had tons of luck restoring other parts boxes. Could you measure out your carb box for me, thinking maybe I can find one here at work and making one to put the carb in? I have the tape and glue. Just need label and presto, I hope.😉
SFC Matt Miller, "ALLONS"
4-42 GPW,
4-45 MB,
4-43 MBT,
4-43 WLA
"Find The Bastards and Pile On" 11th ACR 87-94

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Wed Aug 09, 2017 9:24 am

You bet! Here ya go.

The box is wrapped in that typical heavy waxed type paper that has the green color and looks almost like duct tape. It is then taped with a manila color paper tape like is found at the post office.
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.
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carb box 2.jpg
carb box 2.jpg (178.36 KiB) Viewed 79 times
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Each of the end flaps are 5.25" x 2.625"
The inner dimension of the box is 6.375" x 5.25"

I did not account for the minor difference i dimensions where the corners of the box are folded and where the flaps fold over to seal as mine is slightly compressed from age.

Overall dimension with box, wax wrapping and tape is 5.75" x 5.75" x 6.75"
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carb box 1.jpg
carb box 1.jpg (175.63 KiB) Viewed 79 times
The label is 2.00" x 1.75"
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carb label.jpg
carb label.jpg (143.75 KiB) Viewed 79 times
The tape is 2.00" wide

There is a small stamp stating it is packed with dessicant etc...
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dehydrating.jpg
dehydrating.jpg (138.82 KiB) Viewed 79 times
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by matt506 » Wed Aug 09, 2017 9:28 am

Of course a odd box size.😦 awesome thanks see how we will do this. Maybe one of my NOS blackout light bulb boxes is the same.
SFC Matt Miller, "ALLONS"
4-42 GPW,
4-45 MB,
4-43 MBT,
4-43 WLA
"Find The Bastards and Pile On" 11th ACR 87-94

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Wed Aug 09, 2017 10:01 am

matt506 wrote:
Wed Aug 09, 2017 9:28 am
Of course a odd box size.😦
Just keep in mind my carb carton is sort of mis-shaped and the overall dimensions are probably distorted.
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Wed Aug 09, 2017 10:06 am

The orange HD label looks just like the box labels for the bearings but it is a paper label not cardboard. It has been taped over with clear packing tape that has yellowed with age. In the image on the far right side you can see where the tape gun serrated cutter has sliced off the tape.
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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Re: Building a 42WLA Blank Boss Engine in a Crate

Post by 17thAirborne » Wed Aug 09, 2017 10:16 am

I am not going to finalize the dimensions for the height of the side panels until I can install the cylinders with heads and the upper mounting bracket. There is a wooden block screwed to the top panel that attaches to the center hole of the mounting bracket.
mounting block.jpg
mounting block.jpg (145.4 KiB) Viewed 72 times
Oz

WLA SN 42WLA56511, USA-692406
WC-12 SN 8682327, USA W-231808

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