Delorto PHF pump arm pin

Twosheds

Twosheds

Junior member
Location
Surrey. England
Will some one please put me out of my misery. Is there a trick to getting that pin out? The one that holds little the plastic lever that locates into the throttle slide ramp. It''s tiny and I can't budge the ting with a small drift. I'm concerned that if I hit it any harder, I'll break something.
 
Only comes out one way, tap it on the pointy end. Normally leave them be unless there is something wrong with them.


    Keith
 
Remember there is a little spring that will fly out under the arm as you remove the pin. The pin has a spline on one end, that's the end that should come out first.
 
Yeah, the little plastic lug that follows the ramp slot has broken off the arm so I have to replace it to get the pump working again. If I can't get the pin out I guess I could just break the lugs off the other two and run without pumps.
 
Twosheds said:
Yeah, the little plastic lug that follows the ramp slot has broken off the arm so I have to replace it to get the pump working again. If I can't get the pin out I guess I could just break the lugs off the other two and run without pumps.
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And you will not notice any difference except for a lighter throttle and slightly better fuel consumption me thinks
 
Ah..... I was, kind of, joking .... But..... Brett, you say I won't notice a difference if I run without the throttle pumps working. I have to say I never noticed that one wasn't working until I spotted that nothing was squirting on that carb. So... if I disable the other two, all that happens is I get more MPG.... can that be right?
It's now dawned on me that maybe I should be concerned about where the little plastic lug that broke off has got to now. Might have been like that for months but..... could have been yesterday. I've had it running for about 5 minutes so I'm guessing that it might passed through the engine.  Does seem a bit unlikely that it could get past the inlet valve without something horrid happening though. Oh lordy lordy..... I dunno what to do.
 
Twosheds said:
Ah..... I was, kind of, joking .... But..... Brett, you say I won't notice a difference if I run without the throttle pumps working. I have to say I never noticed that one wasn't working until I spotted that nothing was squirting on that carb. So... if I disable the other two, all that happens is I get more MPG.... can that be right?
It's now dawned on me that maybe I should be concerned about where the little plastic lug that broke off has got to now. Might have been like that for months but..... could have been yesterday. I've had it running for about 5 minutes so I'm guessing that it might passed through the engine.  Does seem a bit unlikely that it could get past the inlet valve without something horrid happening though. Oh lordy lordy..... I dunno what to do.
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It won't even get past the throttle slide into the mixing chamber to allow it into the engine.  Last person to fit the carbs probably broke it off and thought "fuck it" and stuffed it all together as it was.  A little piece like that will easily be swallowed and spat out by an engine at high revs, might give a slight clatter for a short time while it is jammed between valve and seat, but once it's through, all will be fine... :D  Once forgot some paper shop towels in the inlet throat of a Ducati 851 when I re-fitted the injector bodies.  Started a bit shitty, but when the shredded towel bits flew through the workshop it dawned on me! :o  Once the shreds stopped, it ran fine. :D

Simply omitting the pumps will not work without fettling the remainder of the carbs.  You may well end up requiring slides with a different cutaway and/or perhaps larger idle jets to attain a clean engine pick-up under load.  Does depend a bit on overall set up of the engine.

piet
 
Bloody expensive paper shredder :-) At last someone who agrees with me you can t just dump the accelerator pumps and walk away. :o
 
I work on power stations and a popular videos to show new starters is one demonstrating how important FME is and how much damage a roll of paper can do to a gas turbine.

https://sites.google.com/site/makhostia3/experential-learning/gas-turbine-blade-damage

I'm sure a little piece of plastic would go straight out of the exhausts  ;)

 
SimonR501 said:
Yeah, mad on Foreign Material Exclusion at our power station as well.
Covers all over the place.
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The nice big covers they drape over the turbine rotors when the top casing is off make good bike covers  :)
 
Right, so I don't need to start stripping it all down to find it. Christ.... that could have been an engine out job.

Phil.... how to heat up the pin mounts without melting the arm? Ok... I know it's already broken so it doesn't really matter. Even so, be nice to get it out without getting molten pump arm all over the place.
 
OK... I know it's been a while but, just to complete the thread so it is actually of some future use to some body...... immersing the carb top in boiling water for a couple of minutes did the trick and the pin drifted out quite easily. Thank you for your help.
 
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