The hand pump gives redundancy to the hydrolic system only in the event that
the electric power pack fails. In the event of an electrical failure, the
hydrolic system itself would still be intact, but the hand pump is a one way
pump, only allowing you to pump the gear down, not up. The 182RG's gear
system is a closed hydrolic system, as it only operates the gear. To have a
complete hydrolic system (gear) failure such as a blown hydrolic line or
fitting causing the system to loose it's entire quantity of hydraulic fluid
would be quite rare I would think. I'd much rather have a backup system to
an electrical system malfunction than have a back up to an hydrolic system.

Jim