|
Post by macplaxton on Jan 24, 2012 22:21:57 GMT
That diaphragm doesn't look too bad. No holes in it.
Apart from the sediment, which you've tapped/blown out, the rest looks fairly clean. Maybe you dislodged something that was causing one of the one-way valves to not seat.
|
|
|
Post by 33grinder on Jan 24, 2012 23:28:13 GMT
Looks like you've been growing potatoes in there Nick!
|
|
|
Post by Nick on Jan 24, 2012 23:38:01 GMT
my thoughts exactly mac, will put it back on tomorrow, now I know I can take the top off without having to remove the entire pump at least if it dont work its no great hardship rebuilding it in situ
hmm just sitting here playing with it again its gone quiet. maybe it was me flexing the diaphragm earlier that got some spring in it.. but its got none again now..
ah well least the valves work and I wont have to worry about digging them out the pump body. so hopefully with the diaphragm changed it will try and go
|
|
thebear54
DAF Nut
Those who say it can't be done, should not interupt the people doing it !
Posts: 1,426
|
Post by thebear54 on Jan 25, 2012 0:00:10 GMT
N I C K I have seen far worse inside those fuel pumps. I see no reason why it should not work after a good cleaning. You might be surprised. I could suggest an in-line filter before the pump so that no other crud makes it's way in there. You can see where I position all my filters in this photo. John
|
|
|
Post by macplaxton on Jan 25, 2012 1:28:28 GMT
Where John? There's no arrow?
|
|
|
Post by Nick on Jan 25, 2012 7:35:54 GMT
it'#ll get a new diaphragm as there is no bounce in the old one, the only way it works it seems is if I massage teh diaphragm and put it back together, then after half hour or so its gone hard again lol... dont matter the kit should be here any time soon, John.. ah yes I see the filter on the pipe between chassis leg and OS cylinder head
|
|
|
Post by 33grinder on Jan 25, 2012 8:51:59 GMT
Or NS in this case N ick - don't forget, John drives on the wrong side of the road.
|
|
thebear54
DAF Nut
Those who say it can't be done, should not interupt the people doing it !
Posts: 1,426
|
Post by thebear54 on Jan 25, 2012 10:41:17 GMT
Or NS in this case N ick - don't forget, John drives on the wrong side of the road. ;D ;D ;D Wrong Side ?? ;D ;D ;D Depends on your point of view (and of course, which side of the Pond you live on ) Correct N I C K , you've spotted the filter. John
|
|
|
Post by spunkymonkey on Jan 25, 2012 17:29:59 GMT
The chance are that diaphragm's gone porous with age, Nick. They're made of 2 or 3 layers of cloth impregnated with some form of rubber. Over time the rubber dries out, breaks up and leaves a porous patch. Because it's in layers the first thing the fuel does then is get between the layers - which is what causes the balloon effect - and start attacking the next bit in a different place. So you end up with 2 porous layers that look ok because the other layer masks the damage but still leak!
When your repair kit arrives, carefully peel the layers of the old diaphragm apart and you'll almost certainly see "thin" bits on each layer.
|
|
|
Post by Nick on Jan 25, 2012 19:27:06 GMT
its running happily on the key with the old pump at the moment as I had other things to check.. and sadly there is no drive of any description when selecting gears. Will take my axle stands tomorrow and get teh bum up in teh air so I can get underneath and see what I bent trying to get it back into neutral when I couldnt push it off minidans truck (had knocked it into gear with my fat bum climbing about inside)
thanks for the explanation Spunkster, resdt assured as soon as the kit turns up ill pop the diaphragm into the pump for peace of mind
|
|