The CJ3A Page CJ3B.info

Post reply

Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.

Note: this post will not display until it's been approved by a moderator.

Name:
Email:
Subject:
Message icon:
Verification:
Type the letters shown in the picture
Listen to the letters / Request another image

Type the letters shown in the picture:
Write the word between words Jeep from this JeepWILLYSJeep?:
How many slot has a GPW grill?  7 - 9 - 11:

shortcuts: hit alt+s to submit/post or alt+p to preview


Topic Summary

Posted by: 1955CJ-5
« on: December 03, 2020, 07:19:45 PM »

Here is a picture of the new replacement valve vs the old original.

The replacement is about 1/16" taller, so it bottomed out in that one location.

Posted by: 1955CJ-5
« on: December 02, 2020, 10:19:04 PM »

One of the problems I ran into was that the new valve would not install in the circled location, as it would hit the shelf below.

Fortunately, having removed six of the old valves, two or three were serviceable and so I picked what seemed the best for that location.
Posted by: 1955CJ-5
« on: December 02, 2020, 10:10:16 PM »

Just a couple more pictures.

I used my trusty Sears combination vacuum/pressure gauge and the pump makes 3 1/2 lbs of fuel pressure and about 5 psi vacuum on the vacuum side, when pumped by hand...should work OK, if ever needed, This is a spare after all....

In the last picture you will see that the 4693 has a follower on the actuating shaft. Another improvement I suppose...
Posted by: 1955CJ-5
« on: December 02, 2020, 10:05:14 PM »

Here are a couple pictures of the old valves verses the new.

I used a dremel stone to remove the staked portion that held the valves secure, then pried them out, on advice from Then and Now, with a screwdriver. Not pretty or delicate but it worked.

The valves in the fuel side dropped right in and are retained with the clip and screws.

The valves that were pressed in were a very tight fit, so I polished the edges a bit with the dremel and they reluctantly seated. They were going nowhere but I staked them anyway...ground a punch to the approximate shape to duplicate the original stake marks.
Posted by: 1955CJ-5
« on: December 02, 2020, 09:56:05 PM »

When I was rebuilding the CJ-3a I became obsessed with finding the correct, and functional, fuel pump. This resulted in several online purchases. I actually don't remember where the pump that is on my 3a came from, but it works and so I'm happy.

But I had this AC 4693 pump, which seemed pretty original except that it didn't work. It was so stiff you could not move the actuating arm. Turned out the upper/fuel diaphragm had turned to an inflexible solid.

Enter Then and Now Automotive.

https://www.then-now-auto.com/

I called and they had a kit....not cheap, but well.....it would keep me entertained for a while. For this pump, which is what I'm told is one of the last developments of the combination fuel/vacuum pump, I needed a FPA 207-A kit. The main difference being the vacuum diaphragm actuating arm which had two notches in the sides rather than a slot in the middle...easier to install....for some...

Here are a couple pictures. Not a step by step rebuild but I hope informative to others....