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MAINTENANCE MANUAL
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FROM RESERVOIR INLETCASE
DRAINOUTLETACMP
CD IN
CD OUT
ACMPFLTRMDL 4
1
TO RESERVE
BRAKE SYSTEM
2 115V ACL BUS
115V/200V
HYD ACMPAC BUS L
ENABLE RP5
HYD ACMPENABLE RLY R
5 SEC
R ACMP T/D MODULEA (SH 1)
B (SH 1) HYD PUMP RDLY RELAY ACMP ELCUT
TO HYD TEMP
IND SYS
R ELECT HYD PUMP
MOTOR
P
IN
TO HYD PRESS.
IND SYS
ELEC HYD PUMP ROUT PRESS. SW
P PTU SYSTEM L HYD SYSTEM ELEVATORS
NORMAL BRAKES HYDHYD
ISOLATED ACMP MOTOR PUMP RL
PRESS. S/0 VALVE
R LRCLR CL RCLRCLRCLRC RAT RETRACTION THRUST REVERSERS AUTOPILOT LATERAL SPOILERS AILERONS RUDDERS AUTOPILOT ROLLOUT STAB TRIM 3
Right Hydraulic System Schematic
Figure 15 (Sheet 2)
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(2)
If system pressure becomes too high, a pressure relief valve opens to route fluid to the system return line.
(3)
Fluid flows through the ACMP and EDP cases for cooling and lubrication. This case drain fluid is filtered by the ACMP or EDP modules and is cooled by the system heat exchanger. The cooled fluid is returned to the system reservoir through the return filter module.
(4)
The ENG pump select switch on the hydraulic control panel controls the EDP. With the switch in the ON position, the depressurization valve is de-energized and the pump outlet port is open. The pump supplies fluid flow as demanded by the operating systems. Placing the switch in the DEPRESS position energizes the valve to block fluid flow from the pump. The only output is the case drain flow for pump cooling and lubrication. Pulling the engine fire switch on the aft electronic control panel P8 to the FIRE position will also energize the valve. This also closes the EDP supply shutoff valve to block fluid flow to the pump.
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