Vacuum pump for diesel?

[phamine]

Is there a hand operated pump I can use to draw diesel from a fuel tank to the injection pump without destroying the seals in the vacuum pump?

I've been using a cheap harbor freight one that always fails if diesel or brake fluid which I find unavoidable.

Any suggestions on the right type of tool for this type of work?

 

[MattPersman]

myself and my counterpart at my shop just use a metal mightyvac brand vacuum pump. we only have a few models that need that type of priming, but no issues thus far over the years

 

[GOLF for LIFE]

^^^ X2 mighty vac to the rescue, they make a great hand pump for drawing Diesel fuel from the tank to the injectors.

 

[Lotek]

Wrap a rag around a blowgun and put it loosely in the fillerneck, put a little pressure on the tank (1-2psi) and wait till fuel hits the bleed screw. The only drawback is that it takes 2 people.

 

[Steevo]

Wrap a rag around a blowgun and put it loosely in the fillerneck, put a little pressure on the tank (1-2psi) and wait till fuel hits the bleed screw. The only drawback is that it takes 2 people.

You have a blow gun with a 2psi regulator built in? cool!

 

[Lotek]

You have a blow gun with a 2psi regulator built in? cool!

Actually our evap tester cart does that but a loosely wrapped shoprag around a blowgun and a light touch on the trigger will keep you out of trouble. The idea is to just push the fuel through the line, not build up any pressure.

Note, Only for diesel, don't do this with gasoline.

 

[phamine]

I'd stick to a vacuum pump. I'm going to shy away from Lotek's method, though it does sound like it would work.

Would this one work for my application? Does it have the same rubber seal that deterioates once diesel or brake fluid gets on it?

http://www.amazon.com/dp/B0002SQYUA/?tag=atomicindus08-20

 

[otis66]

What kind of diesel engine are you trying to prime? The diesel engines I work on have a primer pump on the fuel injection pump or at the fuel filter. You can remove the primary and secondary fuel filter and fill them with diesel fuel. I have a small pump attacted to a 5 gal fuel tank I use to prime fuel on a MCI coach. If it's a Ford or International drop in type filter take the top off the filter and pour fuel and then put the filter back.

 

[Provincial]

The mityvac kits have adapters with them so you can use a mason jar between the pump and the fluid. This not only protects the pump, but allows you to **** up fluid for cleanup. It was also intended to use as a brake bleeder, and does work well for that.

My kit had two adapters, one for standard mason jars (also fit a glass mayonnaise jar) and one for wide mouth mason jars. You need to provide the jar and the metal screw the holds the cap on.

I bled out two fuel systems on 1960 Thunderbirds that had been sitting with rotten (it was like green slime) gas in them. I drained the tanks, added good gas,. took the top off the carbruetor and sucked out the junk with the mityvac/mason jar. I removed the fuel line from the carb, hooked up the mityvac/mason jar to the the fuel line, and sucked until I got clean gas.

As long as you don't fill the jar completely full, the mityvac should never encounter fluid.

 

[Lotek]

That kit includes a jar, I have one, that will do fine. If you are worried about explosion danger, it's diesel, not gas, you aren't making an airtight seal at the fillerneck so you would really have to work at it to get any real pressure.

 

[phamine]

I bought the Mityvac everyone suggested.

It works excellent. Far better than the Harbor freight one I used. It comes with replaceable parts which is a plus if fluid ever reaches the seal.

Thank you