ANOTHER - 743B question

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RobPg1967

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Oct 10, 2005
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After sitting for couple months .... I noticed this fuel leakage after I started the engine .... All the fittings on the top of the engine are tight .... any ideas ?? See new pic in the PICTURES section titled " LEAKY Fuel "
 

RobPg1967

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SORRY - for some reason I cant post the pic ..... always have trouble on this site .... anyway cut n paste this into your browser .... the pictures at the bottom of the page. http://pagliaroexcavating.com/wst_page5.html
 

Tazza

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SORRY - for some reason I cant post the pic ..... always have trouble on this site .... anyway cut n paste this into your browser .... the pictures at the bottom of the page. http://pagliaroexcavating.com/wst_page5.html
So, the fuel is leaking from the injector rail where it joins to the injector?
I have had this problem too, but where the rail joins to the pump. It was because the rail wasn't square with the pump if you know what i mean. Un-do the nut and look how the tube line sits on the injector, if it is sitting off centre bend the metal tube so that it is sitting nice and centre in the injector. That should fix your problem.
The fuel may be coming from your tap off line (those small pieces of hose between the injectors) They have next to no pressure running through them, they just divert the internal fuel leakege from the injectors back to the tank.
I hope that makes sense
 

RobPg1967

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Oct 10, 2005
Messages
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So, the fuel is leaking from the injector rail where it joins to the injector?
I have had this problem too, but where the rail joins to the pump. It was because the rail wasn't square with the pump if you know what i mean. Un-do the nut and look how the tube line sits on the injector, if it is sitting off centre bend the metal tube so that it is sitting nice and centre in the injector. That should fix your problem.
The fuel may be coming from your tap off line (those small pieces of hose between the injectors) They have next to no pressure running through them, they just divert the internal fuel leakege from the injectors back to the tank.
I hope that makes sense
ok Tazz I'll check it out - thanks for the help !!
 

Eric

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Jan 19, 2005
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169
ok Tazz I'll check it out - thanks for the help !!
Here.
Leaky_Bobcat.jpg
 

Tazza

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Yeah, it definatly looks like its not seating correctly at the top of the injector, just like mine did. No matter how tight you tighten it, it refused to stop leaking. I straightened the injector rail tube and presto! no leaks. It must have adjusted where it was seating just enough to seal.
I could always smell diesel and i never actually looked close enough to work out why, its great when you can stand at the back of the loader and not get knocked over from the diesel fumes.
But on the plus side, it does keep your engine clean and rust free.
 
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