3-63. FUEL PUMP TESTING AND CALIBRATION (Contd)
h. Throttle Leakage
This setting is important because it controls the deceleration time of the engine.
Fast button (25) and slow
Depress and release until fuel
pump speed is at 2100 rpm as
indicated on the tachometer (7).
Flowmeter glass tube (38)
Check fuel flow at exactly 470 pph.
If balance has changed between
rpm speed and fuel flow, it must
be reset. Also, selector valve (36)
must be at ROTAMETER position.
Selector valve (36)
Turn to LEAKAGE TEST position.
Count selector switch (17)
Turn to OFF position.
Dumping lever (5)
Pull out so that fuel will be
retained in the No. 1 burette (6).