g741.org

So attempting to hook up my brake bleeder to the top of the master cylinder plug - and am having no luck with the size or threads.
I can power bleed the mc on the m37 plow truck with a 1/2 npt fitting. But that is a newer replacement MC.

Seems to want a 7/16 pipe thread - is this a AN fitting kind of deal or something else. I might have to bleed it the old way at each cylinder - just feeling lazy and would rather use my bleeder.

Need to get the M back on the road, - my hand dug well just went dry, and would be easier to transport a 300 gallon tank in the M, then on a trailer with my daily driver - which has picked this point to spend some time in the mechanic shop.

Was hauling water today, and the well down the road that i am pulling from also started to suck air.....ugh......need rain. Don't even want to think about hauling water and dumping it into the well in January.

Thanks.

Jim

Are the caps the same thread you could switch caps?

Here's an old post with a lot of info:
http://www.g741.org/PHPBB/viewtopic.php ... der#p58062

I used an old MC cap (see photo in the link).
Gary

Ok i got it.

Took some time at lunch today with the MC plug, calipers and the Parker thead ID book.

So my MC needs a 3/4-16 x 1/4" Conversion Adapter with SAE-ORB x FNPT The SAE ORB is straight thread with an O Ring, and the top side of fitting will fit my 1/4 male quick release for the power bleeder.

Here is Graingers version https://www.grainger.com/product/PARKER ... ter-39A312 Page 3463 for the catalog folks (me).

The MC on my other M37 Plow Truck - has a 1/2 npt plug.

Learn something every day - but then again i did spend two hours today fixing a navigational lamp - only to find out the bulb was bad....works great now.....bright like the sun.

Jim

"Learn something every day - but then again i did spend two hours today fixing a navigational lamp - only to find out the bulb was bad....works great now.....bright like the sun."

This hits a bit too close to home!