diesel priming device Detroit

KevinHornbuckle · August 09, 2018, 04:22:32 PM

This works well and is convenient. I put a dust boot over the male fitting when not in use.

The V configuration is so that you can operate it from the side or rear of the coach.

The needle valve allows you to slowly diminish the aux fuel supply as your lift pump starts sucking.

There is a port for a pressure guage if you need to pressurize the fuel system in order to find a leak or verify the right pressure.

Priming requires that your system not be sucking air.

The parts, excluding the sprayer, were about $40.

buswarrior · August 09, 2018, 04:47:13 PM

Most excellent!

happy coaching!
buswarrior

dtcerrato · August 09, 2018, 05:43:54 PM

We have a conventional 12 vdc automotive fuel pump inline between the primary & secondary fuel filters on our IL 671. If priming is needed we flip the switch from driver's seat & the soon as the pump pulsing quiets down the whole system is primed. Electric fuel pump sets idle in line & the fuel flows through it during normal operation. It has bailed us out a few times.

chessie4905 · August 09, 2018, 06:27:17 PM

I installed an electric pump in mine. I'll put a switch with indicator light in engine compartment.

KevinHornbuckle · August 09, 2018, 09:33:22 PM

The electric pump itself needs to be primed. If your tank runs out of fuel, what is the fuel source? I think there are advantags to being able to run your engine from an external fuel supply - of known quality.

luvrbus · August 10, 2018, 06:14:06 AM

The Davco 380 Fuel Pro processors are getting so cheap at truck wrecking yards 25 to 50 bucks ea it's not worth worrying with filters and a priming system any longer IMO

DoubleEagle · August 10, 2018, 06:31:05 AM

Quote from: luvrbus on August 10, 2018, 06:14:06 AM
The Davco 380 Fuel Pro processors are getting so cheap at truck wrecking yards 25 to 50 bucks ea it's not worth worrying with filters and a priming system any longer IMO

I'll second that. With the fuel processor you can run totally out of fuel in the tank, but if you pour some in the top bowl you are good for a few miles. (Field tested in 1997).

chessie4905 · August 10, 2018, 07:09:42 AM

http://www.mcicoach.com/fyiFromMci/maintMatters/0914.htm

windtrader · August 10, 2018, 07:20:29 AM

QuoteDavco 380 Fuel Pro processor

Sounds interesting. Does one of these replace the existing fuel filter system? What the schedule for replacing and draining the water, less labor and time than traditional fuel filter change?

DoubleEagle · August 10, 2018, 07:28:35 AM

Quote from: windtrader on August 10, 2018, 07:20:29 AM
Sounds interesting. Does one of these replace the existing fuel filter system? What the schedule for replacing and draining the water, less labor and time than traditional fuel filter change?

The MCI data sheet covers that. It replaces both the primary and secondary filters, and you can drain any perceived water as often as you like with the engine not running. It's not only quicker and easier to change the filter, it's also cheaper than one spin-on. There are different models, depending on whether you want a heater for cold weather operation or not.

windtrader · August 10, 2018, 07:34:00 AM

On an 8v71 block, the fuel filters are mounted on the side near the front(pulley) side. Any idea how much modding is required to swap this in? Would hoses need to be replaced? Where to mount?

lostagain · August 10, 2018, 07:37:15 AM

Meanwhile, I still use the stock primary/secondary spin on filters on my 6V92TA. Never gives any trouble. Replace them once a year. 10 minute job.

JC

lostagain · August 10, 2018, 07:44:06 AM

All the new buses and trucks now have this new filter system. I can see the advantage in a fleet. Easier to monitor, keep track of, and service. But in my bus the old system works good. Carry spares buried deep in the far corner of a baggage bin (never needed them on the road, but if I didn't carry them I would...). Plus there isn't room to mount a Davco anywhere in my engine compartment.

JC

DoubleEagle · August 10, 2018, 09:00:52 AM

Quote from: windtrader on August 10, 2018, 07:34:00 AM
On an 8v71 block, the fuel filters are mounted on the side near the front(pulley) side. Any idea how much modding is required to swap this in? Would hoses need to be replaced? Where to mount?

I tried to attach two pictures of it on my 1975 Eagle with the 8V71, but the files are too big. Things are different on the MCI setup, but the engine is the same. The fuel line from the tank comes into the processor on one side, and a short line goes from the other side to the fuel pump. Then the output line splits to go to both heads. You can probably mount the processor anywhere it will fit, as long as the bowl is higher than the fuel pump. I fashioned a angle iron bracket to mount it on, but I don't remember just what it was bolted to. It makes life simpler fuel wise.

luvrbus · August 10, 2018, 09:12:55 AM

The Davco just needs to be mounted higher than the full level of the tank they don't need to be in the engine compartment either,there are 2 Vanhools here they are mounted at the tank so the drivers can check the level when fueling