Fuel pump points

Discuss Electrical problems here.
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
Post Reply
Onne
Moderator
Moderator
Posts: 3441
Joined: Wed Jan 26, 2005 4:50 pm
Location: Mapperley Nottingham
MMOC Member: No

Post by Onne »

Will do :)

I'm going for a test drive in a minute anyway.

I bet my handbrake is rusted on after two weeks standing...
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Top
Onne
Moderator
Moderator
Posts: 3441
Joined: Wed Jan 26, 2005 4:50 pm
Location: Mapperley Nottingham
MMOC Member: No

Post by Onne »

Image

The car had another stutter today on the way to the supermarket, is there anything else I can do to check?
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Top
alex_holden
Minor Legend
Posts: 3798
Joined: Tue Jul 25, 2006 9:46 am
Location: Burnley
MMOC Member: No

Post by alex_holden »

Yes, that does look like an attempt at a home-made suppressor. I would be tempted to take it off and see if that makes any difference.
ImageImage
Alex Holden - http://www.alexholden.net/
If it doesn't work, you're not hitting it with a big enough hammer.
Top
bmcecosse
Minor Maniac
Posts: 46561
Joined: Wed Feb 16, 2005 11:24 pm
Location: ML9
MMOC Member: No

Post by bmcecosse »

Certainly looks like a suppressor - if it's any good - there should be no sparks !
ImageImage
Image
Top
Onne
Moderator
Moderator
Posts: 3441
Joined: Wed Jan 26, 2005 4:50 pm
Location: Mapperley Nottingham
MMOC Member: No

Post by Onne »

It still sparks... but smaller sparks
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Top
bmcecosse
Minor Maniac
Posts: 46561
Joined: Wed Feb 16, 2005 11:24 pm
Location: ML9
MMOC Member: No

Post by bmcecosse »

I'm sure it will be fine !
ImageImage
Image
Top
Onne
Moderator
Moderator
Posts: 3441
Joined: Wed Jan 26, 2005 4:50 pm
Location: Mapperley Nottingham
MMOC Member: No

Post by Onne »

I'm hoping so :)

What gap should the points have? I can't find it in the manual.
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Top
bmcecosse
Minor Maniac
Posts: 46561
Joined: Wed Feb 16, 2005 11:24 pm
Location: ML9
MMOC Member: No

Post by bmcecosse »

Normally - they sit closed. When power is applied they are pulled open by the drag of the solenoid coil, and then flip closed again as the coil relaxes. So - the gap will really depend on the stroke of the solenoid - which is set by however many turns you screw the point set onto the armature shaft.
ImageImage
Image
Top
kennatt
Minor Legend
Posts: 2625
Joined: Fri Feb 02, 2007 9:11 pm
MMOC Member: No

Post by kennatt »

I know its probably too late for you now but each time I have changed points on su pumps I carefully count the number of turn to get the old ones off the armature shaft. Then screw the new ones on by the same number,not had to reset the points gap using this method,Seems to work out about right each time.
Top
mick64
Minor Friendly
Posts: 42
Joined: Sat Jan 31, 2009 5:32 pm
MMOC Member: No

Post by mick64 »

Does the power go to the fuel pump when ignition is switched on?

I have no power for some reason...

I don`t fully understand the need for points... :oops:
Top
Onne
Moderator
Moderator
Posts: 3441
Joined: Wed Jan 26, 2005 4:50 pm
Location: Mapperley Nottingham
MMOC Member: No

Post by Onne »

You are saying that you don´t see the point :D :D
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Top
rayofleamington
Moderator
Moderator
Posts: 7679
Joined: Fri Nov 01, 2002 2:55 pm
Location: LEAMINGTON SPA
MMOC Member: No

Post by rayofleamington »

I don`t fully understand the need for points...
You certainly need power to the pump!

The pump is a linear solenoid + a spring and a diaphragm
The solenoid pushes against a spring when the power is on. When the slenoid has compressed the spring, the points move so the power should turn off. The spring pushes against a diaphragm which pushes the fuel to the carb.
Therefore when no fuel is flowing (when carb is full) the spring stays compressed and the points stay open - so no electricity is used. When the fuel flows the spring moves and the points close and the cycle starts again.
Ray. MMOC#47368. Forum moderator.

Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block :(
Top
mick64
Minor Friendly
Posts: 42
Joined: Sat Jan 31, 2009 5:32 pm
MMOC Member: No

Post by mick64 »

Onne wrote:You are saying that you don´t see the point :D :D
:D

Now I do ,clever things and it has burst into life... 8)

Thanks for the clever answer Ray...
Top
Post Reply

Return to “Electrical”