12v inline pump

diggerjones

diggerjones

Well-known member
So working away at moment. Got my 1.5t digger with us. This morning very cold, started digger very rough running. Thought frozen deisel but didn't clear. Anyway the frost must have shagged little 12v pump. After most of the day messing with it, we got a pump from a car parts place. Think the new one maybe to big as it seems to be putting alot of presure on the return pipes on the injecter pipes and making them leak. My question is does this make sense?
Heres the old pump. The new pump is twice as big.
Thanks
20220118_145029.jpg
 
hiluxman

hiluxman

Well-known member
diggerjones said:
So working away at moment. Got my 1.5t digger with us. This morning very cold, started digger very rough running. Thought frozen deisel but didn't clear. Anyway the frost must have shagged little 12v pump. After most of the day messing with it, we got a pump from a car parts place. Think the new one maybe to big as it seems to be putting alot of presure on the return pipes on the injecter pipes and making them leak. My question is does this make sense?
Heres the old pump. The new pump is twice as big.
Thanks
Click to expand...
Ring dealer, order new one that's correct, keep working til it arrives.
 
Vinpetrol

Vinpetrol

Well-known member
I replaced mine with a generic one from eBay , still going fine .
 
Left hooker

Left hooker

Well-known member
Any mini normally fitted with those pumps return to tank
If you have ignition on but not engine running you can here it splashing back into the tank is your return line blocked just a thought
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
doobin

doobin

Well-known member
V8Druid said:
that looks to be a pulse pump as opposed to a rotary pump, which I assume you've picked up and will be flowing a hell of a lot more fuel, hence the returns leaking as they ain't big enough to cope, if that's the only return route and aren't usually clipped either. The pulse pumps only flow a limited amount as demand/back pressure allows. ... a rotary is a constant flow



Click to expand...
As Druid says, get one of these. They are basically an electrical replacement for the old school engine driven diaphragm lift pump. So instead of cranking an engine over thirty times if there is an issue, you just turn the ignition to live for a few seconds and the whole system is primed.

They should be fitted to every machine, but manufacturers are still in the stone ages.
 
diggerjones

diggerjones

Well-known member
My mate has ordered one of these, so should be ok. Hopefully.
Thanks for everybody's help
Screenshot_20220119-070117.jpg
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Yes it does pump fuel at a higher pressure as it would probably be keeping up with an injection system of some sort! Your mini would probably run without a pump as long as the tank is full and got good gravity, have found them in the past where the pump 12v plug was disconnected and it ran for months like it, no one knew any different until it ran out of fuel and wouldn’t self bleed,
 
diggerjones

diggerjones

Well-known member
Yeah mick i thought it would run with the pump not working. I thought it was the frost, then i thought it was s**t in the system caused by the frost moving the crap. Then spoke to a fitter who said it wouldn't run with a shagged pump. So tested it and realised was the pump.
Heres the temporary pump that's way to big
20220119_083311.jpg
 
jd6820

jd6820

Well-known member
diggerjones said:
Yeah mick i thought it would run with the pump not working. I thought it was the frost, then i thought it was s**t in the system caused by the frost moving the crap. Then spoke to a fitter who said it wouldn't run with a shagged pump. So tested it and realised was the pump.
Heres the temporary pump that's way to bigView attachment 31468
Click to expand...
Yeah that pump isn’t a diaphragm pump like the others hence the leaks. That pump there is designed for a system with a decent return to tank system in place.
 
diggerjones

diggerjones

Well-known member
jd6820 said:
Yeah that pump isn’t a diaphragm pump like the others hence the leaks. That pump there is designed for a system with a decent return to tank system in place.
Click to expand...
Also bigger intake. So would shift some fuel.
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
that sort of rotary pump will also put 36-40PSI into a petrol injection system common rail and shift high volumes, as they're for a constant flow system ... also make a half decent transfer pump for filling from a drum ... pretty rapid flow rate Dylan ... will empty a 45 drum in about 15 - 20 minutes
 
Sledgehammer

Sledgehammer

Member
Biodiesel fuel doesn’t like cold temperatures despite what the fuel suppliers tell you. They go waxy at just below zero. Some worse than others. Make sure that your filters are changed regularly. These small pulse pumps die on you if they get gummed up. It helps to fit a el cheapo inline filter in just before the pump so you can see what is happening. Also worth making sure that the fuel tank hasn’t got a lot of sludge in the bottom of it. Always best to top the tank up to the top at night.
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
I would say that is a bit over kill, I guess the old pump doesn’t tick when you power it up?
 
You must log in or register to reply here.

Footer block 1

Footer Block 2

Plant Construction Forum

Footer block 3

Our Partners

Top