29-15-00
 ALL  ú ú 01 Page 18 ú Oct 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 9.  EDP Supply Shutoff Valve (Fig. 13)
________________________
 A.  The supply shutoff valve controls fluid supply to the EDP and is normally in the open position. The valve is operated by a 28 volt dc motor which is controlled by the engine fire switch. A position indicator on the valve provides a valve CLOSED or OPEN indication. The valve is installed in the EDP supply line in the fairing area on the aft side of the wheel well forward bulkhead.
 10. Heat Exchanger (Fig. 14)
______________
 A.  Separate heat exchangers for systems A and B cool pump case drain fluid as the fluid returns to the reservoir. The two heat exchangers are composed of coils of finned aluminum tubing located in the wing fuel tanks using fuel as a coolant. The system heat exchangers are at the inboard end of the left and right main fuel tanks, respectively. The standby system is not fitted with a heat exchanger. A minimum of 250 gallons (1675 pounds/761 kilograms) of fuel is required in each main tank to provide hydraulic fluid cooling.
 11. Ground Service Disconnect (Fig. 15)
_________________________
 A.  Hydraulic systems A and B can each be pressurized from a hydraulic test bench connected to the ground service disconnects. Systems A and B disconnects are located on the aft wall of the respective left and right air conditioning bays, forward of the wheel well forward bulkhead. At each location are quick-disconnects for pressure and return lines, and a filter containing a replaceable element. Each connector is fitted with a dust cover and retaining chain.

Hydraulic Systems A, B, and Standby Case Drain Filters
Figure 12 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-15-00
 ALL  ú ú 04 Page 19 ú Mar 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SEE  A 
HYD SOV ENG N0. 1  NORMAL FIRE SWITCH NO. 1 ENGINE  OPEN 
28V DC BAT. BUS  FIRE 
P8  CLOSE 
FLUID SHUTOFF VALVE NO. 1 ENGINE HYDRAULIC 
HYD SOV ENG NO. 2  NORMAL FIRE SWITCH NO. 2 ENGINE  OPEN 
SHUTOFF VALVE (TYPICAL) EDP SUPPLY  28V DC BAT. BUS  P8  FIRE  CLOSE 
A  FLUID SHUTOFF VALVE NO. 2 ENGINE HYDRAULIC 
A B NORMAL OVHT DET ENG 1 OVERHEAT  DISCH L R  WELL FAULT APU DET INOP WHEEL  BELL CUTOUT DISCH  OVHT DET A B NORMAL ENG 2 OVERHEAT  X T T E S T 1 L R DISCH L BOTTLE DISCHARGE ENGINES E R BOTTLE DISCHARGE  2 R 
A U L T I N O P F  TEST  O V H T F I R E  APU BOTTLE DISCHARGE  FIRE SWITCHES (FUEL SHUTOFF) PULL WHEN ILLUMINATED LOCK OVERRIDE: PRESS BUTTON UNDER HANDLE  L APU 
P8 

EDP Supply Shutoff Valve
Figure 13

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-15-00
 ALL  ú ú 01 Page 20 ú Feb 25/85
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500MAINTENANCE MANUAL
SEE B
SEE A
SYSTEM A HEAT EXCHANGER
FUEL TANK FLOOR
A

Hydraulic Systems A and B Heat Exchanger
Figure 14 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-15-00
 ALL  ú ú 01 Page 21 ú Oct 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 12. Hydraulic Control Panels (Fig. 16)________________________
 A.  The control panels are on the P5 panel and contain the pump select switches and system warning lights.
 B.  The pump select switch for each EDP and EMDP is an ON/OFF toggle type and is accompanied by a pump low pressure light. Also mounted are EMDP case drain fluid overheat lights.
 C.  The P5 panel has warning lights for low pressure and low fluid quantity in the standby system.
　
中國航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737-300 400 500 AMM 飛機維護(hù)手冊 液壓 HYDRAULIC POWER(58)