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+--- Thread: Pressure relief ball (/showthread.php?tid=8497)
RE: Pressure relief ball - Ruairidh Dunford - 14-04-2023
Is this a start up reading or a thoroughly warmed up engine?
RE: Pressure relief ball - Steve kay - 14-04-2023
Vanes checked to make sure the springs worked, the pump had been checked to make sure there was no scoring before assembly. I had raked about in the box of gauges but could not find anything easily exchangeable, maybe further work is necessary. And that reading is soon after firing up. At least it is better than the readings in the engine room of the Arran ferry.
RE: Pressure relief ball - Ruairidh Dunford - 14-04-2023
Did you check the vanes were the correct orientation?
The oil should read over 20psi when cold.
RE: Pressure relief ball - Chris Garner - 14-04-2023
(14-04-2023, 09:31 PM)Ruairidh Dunford Wrote: Did you check the vanes were the correct orientation?
The oil should read over 20psi when cold.
Good point. " Sharp Tops with Rounded Bottom " !
RE: Pressure relief ball - Ruairidh Dunford - 14-04-2023
(14-04-2023, 09:56 PM)Chris Garner Wrote: " Sharp Tops with Rounded Bottom " !
No!!!!
RE: Pressure relief ball - Nick Lettington - 14-04-2023
Before the QI siren sounds again, is it also customary and or necessary to seat the ball with a hanner blow using a punch (or the bolt you used to get it out?) Or is that just hearsay?
RE: Pressure relief ball - Tony Press - 15-04-2023
(14-04-2023, 09:56 PM)Chris Garner Wrote:(14-04-2023, 09:31 PM)Ruairidh Dunford Wrote: Did you check the vanes were the correct orientation?
The oil should read over 20psi when cold.
Good point. " Sharp Tops with Rounded Bottom " !
A suggested by Ruairidh
:
Much better point " Sharp Bottoms with Rounded Top"
Otherwise disaster
RE: Pressure relief ball - Steve kay - 15-04-2023
New ball was seated by tapping with a brass drift, which may have made the improvement from no indicated psi to about 4 or 5. Vane checks were about springs and seating. Now, do we have unanimity on tops, bottoms, sharp and flats? In other words, what should I see whilst lying under the machine, peering up into the oil pump?
Take dear lady wife Saturday morning cup of tea in bed then use modern research mechanisms called the iPad to investigate sharps and flats. Not orchestral tuning, but vanes. Universal agreement that flat bottoms to each vane for best contact with the oil pump cover.
RE: Pressure relief ball - Charles P - 15-04-2023
(15-04-2023, 07:27 AM)Steve kay Wrote: New ball was seated by tapping with a brass drift, which may have made the improvement from no indicated psi to about 4 or 5. Vane checks were about springs and seating. Now, do we have unanimity on tops, bottoms, sharp and flats? In other words, what should I see whilst lying under the machine, peering up into the oil pump?
Take dear lady wife Saturday morning cup of tea in bed then use modern research mechanisms called the iPad to investigate sharps and flats. Not orchestral tuning, but vanes. Universal agreement that flat bottoms to each vane for best contact with the oil pump cover.
You should see the nice flat base of the vanes ensuring minimal clearance between the base and the rotating vanes.
Suitable stolen photo
IMG_0039.jpeg (Size: 41.13 KB / Downloads: 164)
Charles
RE: Pressure relief ball - Reckless Rat - 15-04-2023
and no gasket!