And if it bites, your tap has seen the end of life, as the thing is hardnedSimply stick a 1/4" BSF tap into the thing, turn as if the put a thread in it, and you will find it will come out easily once the tap bites.
And if it bites, your tap has seen the end of life, as the thing is hardnedSimply stick a 1/4" BSF tap into the thing, turn as if the put a thread in it, and you will find it will come out easily once the tap bites.
How would you know? Anyway during a recent rebuild I check mine (with the cases off) and it was able to be moved - but just to be sure I fitted a new spring having first used valve grind paste to ensure the 'piston' was free and seated correctly. All flushed and washed before returning to service.It would be interesting to know if the relief valve ever works.
Exactly. To lift the pressure relief valve you first need oil pressure.....It would be interesting to know if the relief valve ever works.
You are not alone....Quite frankly, my impression is that bit is near to useless. Many drivers found it stuck open, many closed, did it matter for the engine ? The delivery rate of this oil pump is not immense, nor is the "pressure" of the pulsating piston pump. I imagine the plunger would have to open or close at each shot of the pump if it were to operate as intended. There are a lot of open jets in the oil system that distribute to various places according to their sizes. So what could be wrong with just keeping the plunger closed at all times ? This is a solution that would be critical for high flow gear pumps while warming up a cold engine and cold oil, don´t see much benefit in a Vincent type. Maybe I just don´t get the point of this idea ?
Vic