A reservoir had to be constructed to drive the wheel, which is some distance away from the pump shaft.
The pump shaft is connected to the gas separator or the protector by a mechanical coupling at the bottom of the pump.
The pump shaft broke years ago.
In these applications a second "containment" seal is placed after the primary seal along the pump shaft.
Dynamic examples include rotating pump shafts and hydraulic cylinder pistons.
It rocked up and down like a see-saw, the farther end attached to a long rod which disappeared into the pump shaft.
For that purpose, a mechanical seal is mounted on the pump shaft.
As the pump shaft is turning, there has to be a sealing element consisting of a stationary and a rotating ring.
The pump shaft on the engine was broken, but the plane was flown anyway.
His tongs held only about a third of the former pump shaft.