As has quite rightly been pointed out, many, if not all FCOMs are indeed altered to accommodate each airline's peculiar requirements.
They are however, submitted to Boeing to obtain a 'No Technical Objection' certificate from their Flight Ops dept.
The procedures quoted above reflect a turn around on a multi sector day, 4 to 6 flights, with minimal wasted time on the ground. The 'Secure' checklist is used at the end of the day after the last flight.
The greatest wear on any pump, be it electric or hydraulic, is that incurred during start up. Multiple starts causes far more wear than constant running.