Thread: Td5 Defender fuel pump answers

theres nothing wrong with the design of the pump, mines 170K km and still makes book flow at book amps..

the short list of things that will kill them

a bad earth or other electrical connection
bad fuel
bad installation
low fuel level
restrictions in the low pressure lines
the fuel pressure regulator stuck wide open
leaks in the tanks internal plumbing allowing areated fuel into the tank
water in the fuel
diesel snot
Some fuel addatives (elchepo anti waxing addatives mainly)
Dry running the pump
low voltage running
cavitating or starving the pump
Impacting the pump housing


If youve had diesel snot once and you havent completely and utterly drained cleaned flushed drained treated doesed disinfected steralised and otherwise gone to stupidly outrageous efforts to get rid of it chances are that youve recontaminated the system.

Originally Posted by nornalup

Where abouts is the pump breather located. I thought the air purge (with breather) was located at the top of the fuel filter Thanks for the info.

NSR wheel arch from memory

I ruined mine by running it out of fuel half way up my parents farm drive and driving it home on the started motor (500m or so)

Hi,

Firstly, the Discovery pump fits just fine. There is about a 5mm difference in length - neither here or there. Simply swap the sender which unclips, cut the 2 wires and resolder and heatshrink. I have done this and it works OK.

As for the pump failures, have you checked the filters at the base of the pump - are you sure this isnt just blocked. They are easily removed and cleaned, once the pump has been removed.

As mentioned before, I suspect you have an algae problem and should probably remove your tank, clean it thoroughly and then use a diesel algaecide. The source may be the servo where you refuel.

Our D2 with a steel 145 litre tank with over 250,000kms has it's original pump - touch wood

Good luck. Erich

I've got a noisy fuel pump in my 130 with a LongRanger 127L tank.

The pump sits on the bottom of the sloping tank, and I reckon that the last 10-15 litres is not really usable because of the slope of the bottom of the tank.

When you run it close to empty (i.e. down to 10-15 litres left) it starts to make whining noises which I imagine is air getting into the system.

My thoughts on a fix are, to cut a circle from the bottom of the tank and make a 'sump' for the fuel to sit in, and the pump to go down into. It would only have to be 2 or 3 inches deep, and it would have to have a level or "flat" bottom (i.e. horizontal - not sloped). This would let you use fuel down to the last 2 or 3 litres, and keep the pump submerged for longer when the tank nears empty.

That's my 2 cents.
David

Ok so pulled the tank out and the filter on the bottom and second filter inside the pump housing you could not even see they had that much algae coating them.

I have a hole cut in the floor and I can't drop the tank were I am right now so I've cleaned the pump, scooped out all the tank and wil refit and refill tank and try to see if the pump is working or has gone.

Will have to either run an algacide additive through the tank or the pump is stuffed I will just drop it and do it properly. Fingers crossed that the pump has servived.

I wish i had stopped and done this 1000km ago when it started screaming, only drama was that I was I the way to Perth for a family funeral and had to race back for work.

Thanks for your help guy's.

if im not too late to help, I replaced my pump when i first got my td5 (about 5 months ago).

It was making a terrible whir sound. I first pulled it out (bitch of a job with a 127L tank) and ran it off a jumpstarter in a bucket full of turps. Refitted and it worked for a while, but not recommended as problem returned within one tank of diesel.

Picked up a brand new pump by Allmakes from BMI in Windsor - Sydney - $430

There must be an ongoing issue with mine, cos it started off well, but now making the same sound as before - but its alot quieter.

And for what its worth, they are NOT repairable. The motor cannot be opened.

If I had to do it again (touching wood here) I would drop the tank, cut a sweet hole for the future (again with the wood), drain, clean and install new pump. Then somehow completley FILL the tank and start the pump.
It sounded terrible when I first ran it cos it was dry.

Hopefully helpful...
Fraz

Ok so cleaned it all, refitted and after a hard go restarting it's away and running 100% (although i have not tested the pressure). Ive added a biocide and plan to drop the tank and clean everything after a tank of fuel. I just hope that the pump has serviced and will not die in the near future. Thanks for your input, I've learn't a heck of alot in the last week about this and glad I just didn't pay another mechanic to throw another pump into her.

I have long range tanks. Pump screamed for 2 years. I left it due to everyone saying it was on it's last legs. In the end I pulled it out cleaned it and put it back in. Silent as now and still going. It's bee in the for at least 230,000km that I know of.