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- 30 Sep 2004
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We have a Riello 40 G3B oil burner coupled to a warm air central heating unit. It has been acting up recently - first the motor stopped working a month or so ago; it had been sounding like a strangled cat on startup up for a long while, but replacing the capacitor did the trick and it was running great again.
However, this week the burner went to lock out and would not restart although the motor was still working ok. I checked and cleaned the nozzle which was recently replaced at a service by an oftec engineer and it looked fine. The spark gap was also OK.
Eventually I worked out the oil pump was not delivering any oil. I stripped it down and found that there is a pin that connects the drive shaft to the gear wheel in the pump housing - I guess it is a shear pin. It did not quite fill the gap and so only provided an intermittent coupling between the shaft and the gear wheel.
As the wife was freezing I fixed it up by cutting a soft iron nail to the correct length and using that. Now all is working OK again, but I have doubts about how long it will last.
On the various spares websites I could not see the pin provided as an item. Is it possible to obtain just the pin or do you need to get a whole pump ?
If a whole pump, is it a simple replacement or do you need to set up the pump pressure? I am guessing you need to set the pressure correctly as it would affect the flow rate through the nozzle and the combustion mix. Would also guess that means you need some kind of gas analyser which I dont have and so is time to get the oftec man back, but worth asking the question in case the nozzle is some how kind of self regulating.
However, this week the burner went to lock out and would not restart although the motor was still working ok. I checked and cleaned the nozzle which was recently replaced at a service by an oftec engineer and it looked fine. The spark gap was also OK.
Eventually I worked out the oil pump was not delivering any oil. I stripped it down and found that there is a pin that connects the drive shaft to the gear wheel in the pump housing - I guess it is a shear pin. It did not quite fill the gap and so only provided an intermittent coupling between the shaft and the gear wheel.
As the wife was freezing I fixed it up by cutting a soft iron nail to the correct length and using that. Now all is working OK again, but I have doubts about how long it will last.
On the various spares websites I could not see the pin provided as an item. Is it possible to obtain just the pin or do you need to get a whole pump ?
If a whole pump, is it a simple replacement or do you need to set up the pump pressure? I am guessing you need to set the pressure correctly as it would affect the flow rate through the nozzle and the combustion mix. Would also guess that means you need some kind of gas analyser which I dont have and so is time to get the oftec man back, but worth asking the question in case the nozzle is some how kind of self regulating.
