Worcester Heatslave II 25/32 oil pump bleed screw leaking oil

[sbuntaaaa]

Hey there,

I have in the past bled the oil pump using the hex screw shown in the attached photo. However today (oil ran out from main tank and I needed to bleed air out), it seems to be leaking oil even when firmly tightened back in with the allen key.

I'm concerned if I leave the boiler on and close everything back up its going to keep leaking oil out the screw. Is there a replacement part for this screw in particular? I haven't tried taking the entire screw all the way out, but if possible, I can isolate the green oil pipe also seen in the photo as a bit further up there is a lever to isolate it.

 

[Exedon]

That doesn't look to be an original part .
Difficult to know what going on .
Id Just change it look for Riello pressure gauge extension they come with a new O ring.

 

[oilhead]

The correct Riello screwis tapered into the extension. The washer that is now being held by it is a codge someone has fitted up. See Exedon post above.