Dead Fuel Pump?

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Re: Dead Fuel Pump?

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Re: Dead Fuel Pump?

Postby rickf » February 19th, 2018, 9:57 pm

I wrote up something a while ago based on a video I saw. look for a 50's Kaiser fuel pump. To tired right now to search it out.
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Re: Dead Fuel Pump?

Postby Manhorne » March 1st, 2018, 5:47 pm

So I got my replacement pump today from TNJ Murray (Was $200 cheaper than the only other place that had them). Installed it and The M-151 Lives Again!!!!
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Re: Dead Fuel Pump?

Postby Hambone » March 1st, 2018, 8:40 pm

[quote="Manhorne"]So I got my replacement pump today from TNJ Murray (Was $200 cheaper than the only other place that had them). Installed it and The M-151 Lives Again!!!!


That must equal about $300, they will eventually dry up along with the coils and us poor folks won't be able to afford one, glad to see you're back on the road.
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Re: Dead Fuel Pump?

Postby Mark » March 1st, 2018, 9:17 pm

I have one somewhere along with a filter that fit over it?
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Re: Dead Fuel Pump?

Postby Manhorne » March 2nd, 2018, 7:57 am

Hambone wrote:
Manhorne wrote:So I got my replacement pump today from TNJ Murray (Was $200 cheaper than the only other place that had them). Installed it and The M-151 Lives Again!!!!


That must equal about $300, they will eventually dry up along with the coils and us poor folks won't be able to afford one, glad to see you're back on the road.


Yea, it sucks especially if the goal is to keep the vehicle as original as possible.... Its too bad the old pumps cannot be fixed....I think the capacitor is what is causing the problem on my old one.... Hopefully this new one will last a good long time . If it dies I will just have to use one of the alternative in-line electric pumps. I hate the idea of putting a mechanical pump on since that means re-routing fuels lines and the vacuum system and for me just kills the look of having an early M-151....But for now I am up and running and though I am out some cash there was no other option that I would have been happy with.
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Re: Dead Fuel Pump?

Postby rickf » March 2nd, 2018, 8:13 am

What are you going to do with the old pump?
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
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Re: Dead Fuel Pump?

Postby Manhorne » March 2nd, 2018, 8:50 am

rickf wrote:What are you going to do with the old pump?


IDK.. I was going to fool around with it to see if I could maybe get it working again somehow....

The reason I said I think the Cap may be the problem is because when I was trouble shooting the issue there were a couple of times that it worked for a few seconds and when I put a meter on it when I applied voltage to it I got nothing at all so I know there must be a short in it somewhere...
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Re: Dead Fuel Pump?

Postby SturmTyger380 » March 5th, 2018, 11:03 am

What is the purpose of the capacitor? Radio noise suppression?
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Re: Dead Fuel Pump?

Postby Manhorne » March 5th, 2018, 11:43 am

SturmTyger380 wrote:What is the purpose of the capacitor? Radio noise suppression?


Thats what I have seen other people say it is for....I have not seen anything official that states that but it makes sense....
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Re: Dead Fuel Pump?

Postby SturmTyger380 » March 6th, 2018, 8:12 am

So why not just remove the capacitor and run a new wire down to the pump part?
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Re: Dead Fuel Pump?

Postby Manhorne » March 6th, 2018, 8:25 am

SturmTyger380 wrote:So why not just remove the capacitor and run a new wire down to the pump part?


I have thought of that but the Capacitors body is soldered to the pump. Would have to use a Dremil tool to cut the weld. Its not working now so I do not see any harm in trying that . Plus once I get the cap off I am not sure how it is wired on the other end...
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Re: Dead Fuel Pump?

Postby rickf » March 6th, 2018, 11:20 am

Did anyone notice the date on the new pump? Interesting considering that stopped using them in 69! I am interested in the cap removal also since I have one with a shorted wire right at the top of the cap. If I could remove it then it is usable again. If that is just regular solder then taking that part off should be easy.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
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Re: Dead Fuel Pump?

Postby Manhorne » March 6th, 2018, 12:52 pm

rickf wrote:Did anyone notice the date on the new pump? Interesting considering that stopped using them in 69! I am interested in the cap removal also since I have one with a shorted wire right at the top of the cap. If I could remove it then it is usable again. If that is just regular solder then taking that part off should be easy.

Yea, I thought it was interesting that the date was 1981 on the pump, but I assume there still must have been quite a few older 151's still in service with Guard and Reserve units. Not to mention USAF units. Or maybe they were for ones sold to foreign countries?

I am looking at maybe later this week trying to see if I can remove the Cap from the pump. I will post what I find when I do....
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Re: Dead Fuel Pump?

Postby Manhorne » March 7th, 2018, 10:52 am

Ok, so I removed the Capacitor from the fuel Pump this morning. It is held in place by normal solder . I used a Pin-torch to heat it but I am sure a regular soldering iron could do the job. The only problem is that the bottom end of the capacitor is soldered to a connection inside the "L" joint that it goes in. There is a plug on the outside of the joint that I assume was hammered in after the Cap was soldered in place. I could find no way to remove this plug so I had to cut the capacitor down the side and take it apart so I could heat the wire thats down the center of the cap and remove it. Now the next problem is A) how to attach a new wire without it grounding out on the body. That should not be too difficult . B) the next issue is if I can determine that the pump works without the cap then what to use to seal the area that was sealed by the capacitor so if it is used in a fuel tank that area is not exposed risking a spark or such that would be bad in a fuel tank.

I have provided some pics so it can be visualized....

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Re: Dead Fuel Pump?

Postby rickf » March 7th, 2018, 1:24 pm

You may be surprised to know that a spark inside the fuel tank is harmless since there is not enough oxygen for ignition, as long as the cap is not off and it is windy out. When those wires short out at the top of the cap, which is pretty common, they spark and nothing happens. Now, you would not want that to happen right after filling the tank if the spark is above the gas and in the area still filled with a gas and air mixture. Once the cap is on it only take seconds for the vapors from the gas to build to a point of saturation and no ignition will occur. You could make the connection and fill the hole with epoxy resin, I believe that is impervious to gasoline.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
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