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Topic Summary

Posted by: Rob G
« on: February 28, 2019, 02:13:15 PM »

Thanks for the information!
Posted by: BillT
« on: February 22, 2019, 08:42:08 AM »

I would say that they would be. I have a '65 cj5 engine that had  tubes bent at 90 degrees that you just slipped rubber vacuum hoses onto. Lot'sa different stuff out there.
Posted by: Rob G
« on: February 21, 2019, 06:48:21 PM »

Will do!  Do you know off hand if the vacuum fittings are the same thread as the fuel lines?
Posted by: BillT
« on: February 21, 2019, 08:27:56 AM »

pertaining to the flaring tool be sure to ask for a tool that makes the double flare and you will need to have a tube cutter also.
Posted by: Rob G
« on: February 20, 2019, 09:16:13 PM »

Thanks for the input!  After search far and wide on the internet I figured I would have to make them myself.  I�ll check NAPA out this weekend.  I would imagine they will have the bender and flaring tools as well.

Thanks again for the information.

Rob
Posted by: athawk11
« on: February 20, 2019, 11:18:12 AM »

Hi Rob,
 I have not seen these 3A vacuum lines reproduced.  They were pretty unique to the 3A, so not a very large replacement market for them.  Also, if the manifold was ever changed on the 3A, the connection point , thus the vacuum line design could vary.  This would make it even more difficult to reproduce on a large scale.

They are not super difficult to make if you have a tube bender and flaring tool.  The vacuum lines are inexpensive and carried in multiple lengths at NAPA and other auto parts stores.  Ask them for 1/4" brake line.   
Posted by: Rob G
« on: February 19, 2019, 08:29:42 PM »

I�m working on my CJ3A wiper system.� I have found the �modifications� to it interesting at best.� I am going to reinstall the fuel/vacuum boost pump but the plumbing has been modified beyond repair. Is it possible to purchase the tubing for the vacuum boost pump or is it something I will have to manufacture myself.
Posted by: calvinhunt
« on: March 10, 2013, 01:57:53 AM »

Here's a photo I took some time ago when I removed the left fender to accommodate some problem I was chasing. �
It shows my dual action fuel pump as well as the routing of my vacuum tubing. �

Sorry to be so late to respond. �I've enjoyed the thread. �

Posted by: garage gnome
« on: March 08, 2013, 09:56:09 PM »

Quote
These old fuel pumps are an item with high failure rates. It is extremely unlikely that any running CJ-3A still had the original fuel pump past the 80's. I have never seen any documentation to indicate anything other than part number 647911 being used throughout CJ-3A production. 647911 is an AC series CF fuel and vacuum pump.



My '53 was still using the original pump. I changed it out only because I didn't want the vacuum portion. And then I noticed little pieces of rubber in my fuel filter. So I think the diaphragm was starting to give out.
Posted by: Ryan_M
« on: March 08, 2013, 09:14:03 PM »

Thank you, Bob W, for saving the night. I switched the lines to match your pic (and opposite my old pump) and it fired right up. As I've stated before: it is a miracle I've made it this far with my jeep project given some of the incredibly minor league obstacles that have brought the progress to a grinding halt.
Posted by: Bob W
« on: March 08, 2013, 08:56:07 PM »

This one works good

Posted by: Ryan_M
« on: March 08, 2013, 08:47:27 PM »

I installed the new pump tonight but cannot get fuel to the carb. It sounds like it's working but no fuel pumps through. I tried taking the top cover off the pump and manually adding fuel to try and prime it. Still no luck. What else should I be doing? The previous fuel pump was leaking but aside from that was functioning as it should so I'm pretty sure everything else is good. I had the old pump off a few times and never had any trouble re installing and having it work immediately. What am I missing with this new one?

 Do I even have the hoses connected properly?



Posted by: Bob W
« on: March 08, 2013, 10:41:07 AM »

These old fuel pumps are an item with high failure rates. It is extremely unlikely that any running CJ-3A still had the original fuel pump past the 80's. I have never seen any documentation to indicate anything other than part number 647911 being used throughout CJ-3A production. 647911 is an AC series CF fuel and vacuum pump.

Posted by: athawk11
« on: March 08, 2013, 09:57:45 AM »

Quote
Tim, is that an original double action pump or a new one?

Nate, Nah. �Not original. �It's a replacement that I think belongs on a 3B or CJ5. �I did enjoy your post on the fuel pumps. �I was always under the assumption that 3As came standard with just the vacuum pumps.

Ryan, That glass top double action is awesome. �Love those glass tops!! [smiley=thumbsup.gif] �I would definately rebuild that baby!!

Tim

Posted by: garage gnome
« on: March 08, 2013, 07:26:53 AM »

I think the glass ones can be found on late '53 3As.