emergency hand pump opertions

[Ed Coffman]

Jerry, you have the electromechanical hydralic pump. Master off, pump. gear doors open. Master on gear doors close. In earlier planes with mechanical hydraulic pumps


" OPERATION OF LANDING GEAR DOORS (AIRPLANE ON GROUND).
For inspection purposes, the landing gear doors may be opened and
closed while the airplane is on the ground with the engine stopped. Operate
the doors with the landing gear handle in the "down-neutral" position.
To open the doors, turn off the master switch and operate the hand pump
until the doors open. To close the doors, turn the master switch on and
operate the hand pump.
NOTE
The position of the master switch for gear door operation
is easily remembered by the following rule:
OPEN circuit = OPEN doors
CLOSED circuit = CLOSED doors

[cessnadriver]

Hello Ed.
YES I read my AFM and the maintenance manual, although I'm currently NOT a Skymaster driver I am a A&P and did due diligent. I'm asking because using the AFM reference to "Open circuit Open door and vice versa", my C337 will NOT close the doors using the emergency pump. I have checked the wiring/limit switches and they are fine. I did verify the "Clicking of the solenoid" when the master switch is turned on, as suggested by several members. Doing more research, I may have found a possible solution. Near the end of servicing the power pack I see there is a procedure of "bleeding the time delay valve" by running the front engine (1965 model) and holding the gear lever down for one minute (Para 5-244). I'm trying this procedure this morning, wish me luck.
Thanks, BILLS

[Ed Coffman]

Good luck!