English to French Tech/Engineering Other Borne d'incendie

CONTEXTE :

REMOVING MAIN VALVE FROM BONNET FLANGE:

Slide slotted end of Wrench over top of Stem
and engage the slot with Pin in Upper Stem.
Thread Operating Nut onto stem and tighten
against wrench to hold it securely. Lower
support arm onto top flange of the Upper Barrel
and tighten Thumb Screw to hold the Main
Valve in the closed position. Shut off water at the
Gate Valve. Remove Main Valve Assembly by
turning Seat Wrench counter-clockwise.

Merci!