User manual

Table Of Contents
Part B Section 12.79
08 OIL PUMPS
The oil pump is an engine accessory driven off a geared drive at the rear of the engine.
This drive is also the drive for the fuel pump. Oil pressure is boosted for control of propeller
pitch but should the drive fail the electric feathering pump can supply oil at sufficient
pressure to feather the propeller. There is an electric back up for pumping fuel also but no
back up pump for engine oil.
During cold starts when the oil is thick the oil pump can deliver pressures over 300 psi.
This pressure is due to the bypass system not functioning
At the oil cooler at low temperatures. These extra high oil pressures must be monitored
and the RPM kept as low as possible until the oil temperature rises and bypasses the oil
cooler.
CAUTION: Oil pressure should register within 15 seconds of start. If this does not occur,
shut the engine down immediately and investigate the cause.
Stichting Catalina PH-PBY Rev No: 00
18 May, 2004 Page: 3