Fuel pump problem

[Coldpan35]

Hello everyone like the title says I got a in tank fuel pump problem I can't seem to figure out. I have not pulled the pump to see if the bottom fell off but I will as soon as I get back out to the truck. So any way here's what I did. I changed the fuel filters and went to bleed the lines and no fuel. Checked the pump and it wasn't humming or making any sound. I changed the fuse on the pump and still nothing. Any ideas what it could be?

 

[dmetalmiki]

That's one of the "useen/unkown" problems with those in tank pumps As a deuce will start run and drive just fine without the in tank pump running, So when the pump fails (unknown to the driver) the truck just keeps going fine. Why these things spin their heads off mile after (1000s of!) miles escapes me. Well actually it doesn't, because I fit a switch on the dash to turn the pump off. And it is only turned on to bleed or prime the circuit. You probably have a worn out pump (hardly suprising!) So when you rebuild repair or replace it, Put an Isolation switch on the dash so it remains "like a new one". Some 5 ton M54s will not run or drive with the pump switched off. Some do.

 

[Jeepsinker]

It really needs to have the lift pump working. Starving the hydraulic head for fuel will accelerate wear over time. When you pull fuel through the filters, instead of pushing it, you cause cavitation in the fuel supply, which is micro bubbles of air. It will run, but it is bad for it. Cavitation also can allow water past the filter elements.

If you don't hear the pump running, the motor is bad. That is assuming you verified that you have power to the pump. Get yourself a new lift pump.

 

[dmetalmiki]

Heard of this, But Mine ( 4 ) have been trucking on for over 14 years, no problems. My 1/2 pence worth.

 

[Coldpan35]

Ok thanks for the help guys I'll be getting a new one next week. This is the first time I didn't here it working so I thought it was the fuse but it wasn't cause it has power to the pump but no go.

 

[frank8003]

Take out the old pump, toss it, and put a Parker pump with a new hose.

It is direct fit to original. I let it run for hours to filter and re-filter fuel.
I bought many and here is one of mine.


and see this one,
http://www.steelsoldiers.com/showthread.php?147406-Deuce-keeps-getting-air-in-fuel-system

 

[Jeepsinker]

Yep. I have one in mine now too. Those are a MUCH better pump than the original Olympic pump. Quieter too, not that it really matters.

Dmetalmiki, I'm glad you've had exceedingly good luck with your trucks, and I'm not sure how much you actually drive them, but it must not be enough cumulative milage to see any I'll effects yet.

I've had to replace a couple, including one of mine because of it. Well, that and crappy filters/ rusty tank. It all adds up eventually.

 

[rustystud]

Yep. I have one in mine now too. Those are a MUCH better pump than the original Olympic pump. Quieter too, not that it really matters.

Dmetalmiki, I'm glad you've had exceedingly good luck with your trucks, and I'm not sure how much you actually drive them, but it must not be enough cumulative milage to see any I'll effects yet.

I've had to replace a couple, including one of mine because of it. Well, that and crappy filters/ rusty tank. It all adds up eventually.

I have a new Olympic pump in my right tank and a new Parker pump in my left tank. The parker is so quite I have to take the cap off to hear it run. The new Olympic pump can be heard from the drivers seat with the air buzzer going off ! I have a couple spare Parkers but will keep the Olympic until it craps out. I'll probably be dead before that happens though considering how long they last. Both put out the same pressure, about 9psi .

 

[3rdmdqm]

Do you have a link to this pump? I went to the Parker site and cannot locate this pump with any of the numbers shown.

 

[Jeepsinker]

You find them on Ebay for around $50. If you try to buy it from Parker, it will be over $1000.

 

[Coldpan35]

So I got a new pump and wow! she whistles even better now and runs a lot smoother! Thanks guys for all your help to those who replied to my post!