well, the darn thing is out

[bmorgil]

I was thinking the M38 was like the 2A with the motors on top and the M38A1 was like the CJ3A with the wipers on the bottom. But now I cant find a picture of either M38's or M38A1's with the wiper anywhere else but on top. The M151's on the other hand have them on the bottom. The link I posted below sheds a lot of light.

https://forums.g503.com/viewtopic.php?t=51770

[pelago]

wipermotor3.jpg wipermotor4.jpg
better photos of what i have

[bmorgil]

Those are the real deal. The extra hose goes to the air cleaner, according to that post.

[pelago]

those are the real deal. The extra hose goes to the air cleaner, according to that post.

lots of hose then, not sure i like another hose

[bmorgil]

I checked around the military sites and it seems that the line to the air cleaner was for the underwater fording. So when the motor diaphragm sucked in air it pulled it from the sealed up air cleaner system. I read in a few spots that it apparently never worked well and later model 50's era Military vehicles stopped using the extra hose.

This was interesting about a restriction in the vacuum line to the distributor/wiper motor tee,

From g503.com:
Apparently the tee at the junction of the vacuum supply from the vac pump/vacuum to the wipers/tube from the distributor has a reducer, being a .040 constriction in the center part of the tee from the ignitor- this is to keep the vacuum flow from the distributor down a bit, so the vacuum to the wipers is still good. The way I chose to do this (not having the original tee, regrettably) was to put JB Weld in the reducer fitting to the copper line to the ignitor (the line from the vacuum pump, & to the wiper motors is 1/4", the center of the tee to the distributor is reduced to 3/16") and when fully cured I drilled a hole in the JB Weld with an .040 drill bit. Others have used other methods but that seemed an easy way to do it.

[5JeepsAz]

Those look like new! Will be real nice as paperweights or bookends.. Sorry Sir, I'm out of line again. I know you will get them figured out. If somebody gives me the right Jeep numbers I'll go hunting for a picture from the history books of how they fit on back when, if it would be helpful.