How to install a primer pump

[Van]

Doug, I don't have the #'s but it is the very same one in the photo that Brian posted (12 volt) in post #7. I put a lighted on/off rocker switch in the Batt compartment to power it up. It is a free flow pump, with built in check valve and is Diesel rated. All the best!

[bevans6]

Doug, the pump is made by Airtex.  They have 12 volt and 24 volt versions, it's designed for diesel fuel.  The link to the catalog page is http://www.showmetheparts.com/airtex/  

Here is where we did this last August:  http://www.busconversions.com/bbs/index.php?action=printpage;topic=21134.0

Brian

[ol713]

Here is the type of pump I used.  I used the 24 volt one.  I just put it in line in the main fuel line to the primary filter, on my 8V71 I don't think there is anything that will be hurt by 10 - 14 psi for 10 seconds...   I just run it for a few seconds, you can hear when it reaches pressure and that means everything is full.  If I leave it on, the fuel pressure switch stops the engine from turning over.  I suspect that your main line check valve needs servicing.

Brian

Brian;
                Cute little 24v fuel pump.  Where did you get it?
                                  Merle.

[bevans6]

I bought my pump at Princess Auto in Canada, I don't know where to get them in the US.

Brian

[NeoplanAN440]

An MCI102D3 with S60 should allready have a primer pump . Pump sits on top of the fuel tank , plumbed parallel to the fuel line with check valves. switch is in the rear left panel in engine compartment next to the coolant fill pump !!!!

when i picked up mine it had one allready installed and the other buses on the lot had all the same setup with no marks that somebody retrofitted these later.

[Larry B]

Another thing you might want to verify when you find the check valve is that the flow arrow is rolled to the top side of the fuel line. These are a swing check which means the flapper inside is on a hinge. Due to the force of gravity a swing check works better if hinge is on top. It hinges where the arrow is stamped.
   Larry B 

[travlinman]

For you GM guys out there, here is mine. I installed it after the fuel pump and before the secondary filter. I ran it for about a minute and i was good to go.  I got it at Car Quest but it is the same one that Brian installed in his above referenced post.

Enjoy,

TM

[Fredward]

I didn't know if an in line fuel pump not operating might impede the fuel flow so I made a bypass circuit for mine. It is installed between the tank and the primary filter and it is a 24volt Carter. I think I special ordered it from NAPA.
Fred

[bevans6]

Fred, since that pump is indeed a flow through pump, you no longer have a shut-off valve.  If you turn that valve, fuel will continue to flow through the pump just fine.  If you want to keep the bypass feature and have a shut-off capability, you need to add another valve either before or after the parallel section.

Brian

Edit: since we are showing pictures, here is my install on my MCI configured engine.

[dougyes]

Thanks for all the good advice. Getting to the fuel tank looked daunting and we were in a bit of a hurry so we installed the Airtex 24v pump inline behind the fuel filter. There was an unused momentary switch about a foot away from the filter to power the pump. Works ok so far.

[John316]

Doug,

Three others have asked before me, but I will go ahead and ask myself (maybe it was just two others). Why not use the priming pump that comes with your coach? If you have a D series, it should have a priming pump, at least all of the D's I have seen.

There is that yellow panel in your rear engine door. One of those switches is for the fuel priming pump. One switch is to add coolant from the overflow tank up to the rad. Another switch is for engine start, another is to shut the engine completely off, and the other should be for your rear engine service lights.

Does your OEM pump not work?

John

[gus]

Most small electric pumps work best when near the tank since they are suction from the tank to the pump.

The big advantage to a near tank pump is if there is a small leak in the supply line it will pump fuel out and show up when the near tank pump is operated. A pump at the engine will not reveal this, it will just suck in air like the engine pump.

[dougyes]

John316:
Ours did not come with a stock priming pump. It may have been an option.
Gus:
That's a good point about having it close to the tank. It was just a easy install with plenty of elbow room in the engine bay!