Fuel Pump

My 62 CJ5 came with this non-working fuel pump attached and an electric pump as the working one. I want to get rid of the electric one and repair the mechanical pump. I need help to identify the pump and to look for a rebuild kit. I believe this one has vacuum also, wich I intend to use as a source for the brake booster. It has this tag attached to it.

 

I’m not a fuel pump expert, but do your research first before buying the rebuild kit some of them do not have the correct parts that you will need for that fuel pump. You could do like me and send it off and get it rebuilt. I have not installed it yet but I feel confident that they did do a good job the place I sent it to in California has a good reputation and I did quick work. If you want to know the company just sent me a message and I’ll send you the information.

 

The tag indicates it is an AC 4032 dual action pump. Before you get the kit, about $90, you will need to disassemble the pump completely to include the diaphragms. Note the external configuration. Notch both the top and bottom at the main body with corresponding notches on the main body. The pump will work only if reassembled matching the notches.
The diaphragm shafts will be either a rectangle "keyhole" opening or "cross"-shaped. To remove them, the internal catch arms must be held up while the diaphragms are pressed in, angled away from the external arm and twisted. You may have to remove the pin holding the external arm. There are many small parts in there. Don't just dump them on the counter. They are assembled in a particular manner. Take photos before and during disassembly. When assembling you must pre-load the diaphragms. Chuck the pump arm up in a vise and pull the body to a full-stroke position. Now tighten the screws. Questions? Call me - 336-963-3605.
Your source is Then and Now in Weymouth, MA. Good people.

 

Thanks to both! Would it be better to buy a new one?

 

Alex, These are good fuel pumps if you can source the rebuild parts. I have my doubts that this pump will produce enough vacuum for power brakes, unless you had a large vacuum reservoir. These dual pumps barely produced enough vacuum to run the windshield wipers.
-Donny

 

Indeed, buy a new one. I bought a dual action for about $80 from one of the main vendors a few years ago.

I found, however, that installation was one of my hardest jeep jobs. This due to difficulty inserting the bolt at radiator side. I resolved by purchasing long bolts from K-W to set pump into block temporarily before inserting the actual pump bolts

 

IIRC they used to have bolts with an extremely tall head/hex, at least on the military. Perhaps for that reason.

 

Yes, PeteL. Exactly that (those).

 

The vacuum pump will not support a brake booster. It's primarily for wipers and PCV.

 

Then, it seems a better option to get a simple fuel pump. Cheaper and new.

 

Don't forget about your PCV system...

 

The double action pumps were to power the windshield wipers, as mentioned before, I would tap into the intake manifold for power brake booster vacuum source. If you have ever driven a car with vacuum wipers that used manifold vacuum, they slow down dramatically, and some times stop, not ideal in a passing situation in the rain, but then, passing another vehicle in a 4 banger Jeep isn't likely to happen. Good luck!