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How To Protect Your RV Investment. This forum is set up to discuss insurance needs, terminology & where to go to get the best possible coverage for your needs. From time to time we will discuss the issues and differences in insurance coverage. When would an appraisal be in your best interest & how often should you have an appraisal and where one could obtain a certified appraisal.

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  #1  
Old 10-08-2019
DW SD DW SD is online now
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Default Diesel leak - please help identify the part Cummins ISL

All,
Anyone recognize the leaking part? First photo is circled in red. Definitively diesel fuel leaking.
Passengers side of engine next to fuel filter. Drips on to starter.
I get 3” overnight.
First thought was fuel pump? There are electrical leads on it.
Thank you,
Doug
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Doug W.
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Old 10-08-2019
Kb1jkn Kb1jkn is offline
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You are correct sir, that is a lift pump. If you post your esn I can get you a part number off of quickserve.
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Old 10-09-2019
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Quote:
Originally Posted by Kb1jkn View Post
You are correct sir, that is a lift pump. If you post your esn I can get you a part number off of quickserve.
Hi Mike,
THANKS A BUNCH!
I pulled some #s off the data card. WOW - they sure have a small font!

ENGINE NO: 46296988
ENGINE FAMILY: 3CEXH0540LAC

One question:
1. is it worth upgrading to Air Dog or similar aftermarket lift pump?

Thank you,

Doug
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Old 10-09-2019
Kb1jkn Kb1jkn is offline
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Quickserve shows the pump assembly as pn:FS9340-01. Just the pump can be purchased as pn: 4935013 with a 4935004 mounting gasket required to install. I would double check the leak by cleaning the area well with a solvent and verifying the pump is leaking before replacing it. The parts break down shows a few connections and plugged ports with o-ring seals that could have shrunk with age and began to leak. An aftermarket lift pump can be installed, maybe someone else can chime in with experience in sizing one for your application. I know I would likely replace with a factory pump for ease of parts availability again in the future.
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Old 10-09-2019
DW SD DW SD is online now
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Quote:
Originally Posted by Kb1jkn View Post
Quickserve shows the pump assembly as pn:FS9340-01. Just the pump can be purchased as pn: 4935013 with a 4935004 mounting gasket required to install. I would double check the leak by cleaning the area well with a solvent and verifying the pump is leaking before replacing it. The parts break down shows a few connections and plugged ports with o-ring seals that could have shrunk with age and began to leak. An aftermarket lift pump can be installed, maybe someone else can chime in with experience in sizing one for your application. I know I would likely replace with a factory pump for ease of parts availability again in the future.
Hi Mike,
Thank you. Do you have a recommendation for where to purchase an OEM pump?

Doug
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Doug W.
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  #6  
Old 10-09-2019
Kb1jkn Kb1jkn is offline
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Any Cummins dealer can get you those parts. If you were closer I would be happy to supply them through my dealership, search your area and see if anything comes up. If nothing turns up PM me and I can see what I can do.
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Old 10-10-2019
DW SD DW SD is online now
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I created an account at quickserve.cummins.com
Added various parts to my shopping cart. I feel sort of silly... but I can't seem to find a price nor purchase option. Does Cummins have an online parts counter?

Do you have a recommended online vendor?

From inspecting that area, it seems to have had a small leak for a long time. Lots of dirt built up. So, I was planning to buy the 4 o-rings, pump seal and lift pump. Just replace it all.

Thank you for your help.

Doug
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Old 10-10-2019
Kb1jkn Kb1jkn is offline
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If you have any Cummins dealer in your area they will sell you parts over the counter. I am not sure about them sending parts directly through quickserve online. Also keep in mind if you dont have a Cummins dealer locally just about any dealer I have called in the past can ship to you. If you would like, PM me and I can give you my dealers info and you can purchase everything through them and have it shipped.
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Old 10-10-2019
DW SD DW SD is online now
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Quote:
Originally Posted by Kb1jkn View Post
If you have any Cummins dealer in your area they will sell you parts over the counter. I am not sure about them sending parts directly through quickserve online. Also keep in mind if you dont have a Cummins dealer locally just about any dealer I have called in the past can ship to you. If you would like, PM me and I can give you my dealers info and you can purchase everything through them and have it shipped.
Hi Mike,
You are incredibly helpful.
I'll hit you up if they don't respond to my note.

THANK YOU!

Doug
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Old 10-10-2019
Dan & Cindy Dan & Cindy is offline
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I had a minor diesel leak a few years ago. I was able to cure it by tightening the fasteners that hold the housing together. I think the low sulfur diesel may have contributed to gasket shrinkage.
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