Any obvious faults

[Johnsond]

2 hours ago, openspaceman said:

I see, so the electro-hydraulic only works when the head is parked?

 

The reason high pressure filters are not used a lot is they are very limited in their size because as this increases the bursting forces increase with the square of the dimension. A return filter is under little pressure (until it blocks which is why there is often a bypass relief) so can have a large filtering area.

 

Scuse the poor drawing

 

 

 

When the electro-hydraulic is not parked the petrol can be started and the shuttle moves to block the electric pump output. Similarly when the petrol pump is stopped the elecric pump provides flow and blocks the output of the petrol pump. The relief valves are safeguards should both pumps become fired up

 

Yeah that’s correct it has to be back at front and the two spring loaded  poles engaged on the strips etc to power the 12v system. 
Shuttle valves were suggested by one of engineers onboard the vessel im on but he asked about frequency of use etc ie it’s better if they are in use regularly 🤷‍♂️🤷‍♂️I’ve no idea if that’s correct but all this is in the planning and procurement stage so all input is good 👍. 

Edited September 16, 2021 by Johnsond