[cessnadriver]

Tracy. It looks like you have a newer C337 and that it probably has a electric/hydraulic system where mine is engine driven hydraulic pump. Anyway the systems are set-up so any time you loose electric power the solenoid is in the position to allow you to hand pump the gear down. That's why you cannot pump the gear doors closed WITHOUT the master switch, the solenoid in the system is thinking there is no electrical power and wants to put the gear down. I hope this explanation helps. Believe me I've gone through this during my annual and now understand the system much better.
Regards, BILLS