My Paguro 3000/Hatz engined genny won't start....

[Puggy]

Hello All,

Maybe someone can shed some light on this problem. I have a very elderly Paguro 3000 generator with a Hatz HE673 single cylinder diesel engine driving it. It all ran fine, but I noticed the injector was leaking. I sent it off for a service and reinstalled it. I then tried to restart it, and whilst bleeding the system, I (by mistake) pulled out a knob on the side of the engine block (see photo). I have never used this knob before and I don't even know what it does - I think it might be some cold start arrangement? The knob came out about 10mm and stayed locked out, and won't go back in. The result seems to be that I am getting no fuel out of the high pressure injector pump. I have traced the fuel system along and I think this could be where the problem lies. Does anyone know what this knob should do, what it might be doing and how I get it back in (reset it) so that i can eliminate it from my non starting problem? I do accept that my starting problems might lie in a faulty high pressure pump. Just seems odd that it worked before. All help gratefully received.

Best wishes

Piers

 

[david_bagshaw]

I dont know the engine, however excess fuel devices often need stay out until the engine has done sufficient rpm to release them, ie to keep the fuel going in at the higher rate until the engine is well established. the drawing below shows it rests on the governor arm. opening the throttle to full might get it off, however I dont think it is the cause of your non start


check the engine stop arrangement is in the correct place for running,

with gennys this might be a stop control on the pump, throttle that fully closed, or an solenoid valve which dumps the low pressure side to the tank.

undo the high pressure pipe at the injector, wrap rag around the loosened union and spin the engine to prime the pipe.then tighten & have another go.

be certain the low p side is well primed as the delivery volumes are so small it only takes a small bubble of air to make a no go.


http://www.hatz-diesel.com/fileadmin/user_upload/ersatzteillisten/Archiv/HE673/EL_HE673.pdf

item 7 page 3 of the above doc

 

[Puggy]

Thanks David - useful advice. I will have a go today.

Piers

 

[david_bagshaw]

Good luck, keep at the back of your mind, it worked before, so the only things I have altered are:-

1 ......

Very unlikely a fault has developed in the injection pump, much more likely you have knocked a wire off the stop / run solenoid (if fitted) or something similar.

personally have made all the following mistakes in the initial panic, it wont start:-


fuel tap closed
new filter fitted with 2 rubber rings, so air leak
solenoid wire knocked offf
other wire disturbed
oil pressure wire knocked off (a bugger as engine starts runs a few beats & stops, with electronic safety and start systems)

stop system jammed so no fuel delivered.