Learjet 23 - Page 261

13-3
FOR TRAINING PURPOSES ONLY
LEARJET 20 SERIES PILOT TRAINING MANUAL
FlightSafety
international
LANDING GEAR
DOOR
SELECTOR
VALVE**
LANDING GEAR
SELECTOR
VALVE
BRAKE
SYSTEM
SPOILER
SYSTEM
FLAP
SYSTEM
THRUST
REVERSERS
RELIEF
VALVE
(10 PSI)
CONSTANT-DISPLACEMENT
ENGINE-DRIVEN
PUMP (2)
LEGEND
PRESSURE
SUPPLY
RETURN
AIR (NITROGEN)
PRESSURIZED AIR
ELECTRICAL
FILTER
PRESSURE
INDICATOR
CHARGE
VALVE
ACCUMULATOR
EFFECTIVITY
24D-285 AND SUBSEQUENT
25B-154 AND SUBSEQUENT
ACCUMULATOR
OVERBOARD
VACUUM
RELIEF
GROUND
SERVICE
AUXILIARY
PUMP
PRESSURE
SWITCH
HYD
PUMP
1,700
PSI
FIRE
FIRE
AIR FROM
PRESSURIZED
CABIN
JET PUMP
(VENTURI)
FIRE
WALL
SHUTOFF
*
28 VDC
28 VDC
PRESSURE
REGULATOR
* AIRPLANES WITHOUT GLARESHIELD LIGHTS
** NOT INSTALLED ON SNs 23-003 THROUGH -079
Figure 13-1. Hydraulic System Schematic (SNs 24-296 and Prior,
and 25-180 and Prior, Except 25-135)