Mep 003a fuel pump connectors

[Brother Hec]

I have a MEP-003a with pencil style emi filters on electrical feed to OEM fuel PUMPS 24volt. My problem is that fuel pumps stopped working and I would like to check for juice at pump. However, these pumps have connectors I can’t remove. I am not familiar with connectors. Can you tell me how to remove them at the pencil emi filter upstream from pump?? I would like to avoid cutting line to test pumps. I want to test emi filters rather replacing a pump.
thank you for any help.

 

[Evvy Fesler]

I can't see the connections.

I'm sure someone will give you a much better answer than this, but you may consider it a handy addition to your toolbox if you bought a set of self-piercing multimeter probes. The good ones have a needle point in a hook arrangement that lets you twist-screw them where the needle point pierces and makes contact with the wire. No need to cut the wire.

However... using a piercing probe on a multi-conductor cable is tricky and one member commented later in this thread that water or moisture can get in.

 

[Brother Hec]

I can't see the connections.

I'm sure someone will give you a much better answer than this, but you may consider it a handy addition to your toolbox if you bought a set of self-piercing multimeter probes. The good ones have a needle point in a hook arrangement that lets you twist-screw them where the needle point pierces and makes contact with the wire. No need to cut the wire.

Thank you for your kind suggestion. I will look for one. Do you know anyone who can tell me how to remove these strange connectors ?

 

[Evvy Fesler]

Thank you for your kind suggestion. I will look for one. Do you know anyone who can tell me how to remove these strange connectors ?

Have patience. Someone will answer. Better pictures will help.

 

[Brother Hec]

Thank you for your kind suggestion. I will look for one. Do you know anyone who can tell me how to remove these strange connectors ?

Sorry. This is a picture of pumps I’m talking about. I will try to send pictures of actual connections. Please zoom in on pump to see connections.

 

[rickf]

If you follow those wires back from the pumps there should be rubber Packard connectors on them a couple feet back at the most. I have never seen pumps hardwired in.

 

[Evvy Fesler]

Do you have the Technical Manuals (TM)? You can download them from this website. There's more info about the pumps than what I've clipped here. These are just examples.

 

[Brother Hec]

Do you have the Technical Manuals (TM)? You can download them from this website. There's more info about the pumps than what I've clipped here. These are just examples.

View attachment 884983

Thank you. I saw rubber connectors. Do they just pull apart? I’m afraid of causing more harm than good.

 

[Brother Hec]

Thank you. I saw rubber connectors. Do they just pull apart? I’m afraid of causing more harm than good.

Sorry. Forgot picture of connectors on emi filters. Funny thing is that this genset has two primary pumps. Both do not work on “Prime/Run Position” on switch. Makes me think that there is an electric problem since both pumps are not running. What do you think? I’m

 

[Evvy Fesler]

Sorry. Forgot picture of connectors on emi filters. Funny thing is that this genset has two primary pumps. Both do not work on “Prime/Run Position” on switch. Makes me think that there is an electric problem since both pumps are not running. What do you think?View attachment 884988 I’m

This isn't a generator set with which I'm familiar, but I did read about these pumps in the TM. There's a section that describes how they work. I would suggest that you download the technical manuals (TM) and read about them so you can make the best decision about how to proceed.

Click this link:

All the TM's you need to work on the MEP-003A

All the TM's you need to work on the MEP-003A

www.steelsoldiers.com

 

[Brother Hec]

Copy that…, thank you

 

[rickf]

The rubber connectors do pull apart but you will probably have to twist them a bit to get them going. My guess is that one of the pumps is probably gummed up and that is why it is not running. These pumps are pretty robust and seldom go bad. It does happen but more often they stop working due to varnish and gunk in the pump. You need to pull the bottom cap off the pump to check the internal filter and then you can take it apart from there but as has been said it is best to read all the manuals before you go to far. I am the last guy to say RTFM but with this military equipment if you are not familiar with it from actually running it in service then you have to read the manuals. There are all kinds of little tricks that you would not think of like holding the start switch for a period of time after the engine starts to make sure the generator gets a field current. Both pumps should run but if one has a clogged line or is gummed up then a power test will show normal.

 

[Brother Hec]

I will download the TM as suggested. I appreciate all the advice I have received from everyone. I sincerely thank you

 

[Light in the Dark]

The rubber boot (packard) connectors pull apart, just twist them a bit softly to loosen them up. Once separated, use a handheld multimeter to test for voltage on the DC side (aux + prime setting you should see DC at two of them, prime at only one). Those inline filters fail often enough that if you have juice before them, but no pump activity... its almost certainly them. Not much to the interior of the actual pump.

 

[Light in the Dark]

And if the EMI filter does fail, cut and splice them out in the most waterproof manner you can muster. The pumps should work fine for civilian use without them.

 

[Brother Hec]

Thank you! Appreciate your thoughts and advice.

 

[rickf]

To remove the filter cut the wire and strip back the ends and use a marine heat shrink and glue filled butt connector. Once crimped and heated it will be sealed for life.

 

[Evvy Fesler]

Dors anyone know what’s the failure mode on this electronic part? Just curious.

 

[Brother Hec]

This isn't a generator set with which I'm familiar, but I did read about these pumps in the TM. There's a section that describes how they work. I would suggest that you download the technical manuals (TM) and read about them so you can make the best decision about how to proceed.

Click this link:

All the TM's you need to work on the MEP-003A

All the TM's you need to work on the MEP-003A

www.steelsoldiers.com

Thanks for TM link. I tried to download but only asked me if I wanted to download. Answered yes but nothing happened. Is link only for well established members? I’m new so maybe it won’t work for me.

 

[Evvy Fesler]

You should be able to download them. Try again. Sometimes there can be temporary glitches with Internet apps. You may want to close everything out in your browser and then the browser itself to reset security and permissions.

If you still have problems one of the moderators will look into it.