S 864-011

 (2)  
Make sure the pressure is removed from the left and right hydraulic systems and hydraulic reservoirs (Ref 29-11-00).

 S 434-012

 (3)  
Connect the hydraulic lines to the valve.

 S 864-013

 (4)  
Close this circuit breaker on the main power distribution panel, P6-1: 6F6, LANDING GEAR ALTN EXT MOTOR

 S 714-014

 (5)  
Do the steps that follow to make sure the valve is installed correctly:

 (a)  
Pressurize the left and right hydraulic systems (Ref 29-11-00).

 (b)  
Supply electrical power (Ref 24-22-00).

 (c)  
Examine the valve for hydraulic leaks.

 S 094-015
 WARNING:  USE THE PROCEDURE IN AMM 32-00-15 TO REMOVE THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (6)  Remove the door locks from the landing gear doors and close the doors (Ref 32-00-15).
 

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 (7)  S 614-016Make sure the fluid in the hydraulic reservoirs is at the correct level. Fill if it is necessary (Ref 12-12-01).
 (8)  S 714-017Do a check of the alternate extension system for the correct operation (Ref 32-35-00).
 (9)  S 864-018Remove the pressure from the hydraulic system if it is not necessary (Ref 29-11-00).
 S 864-019

 (10) Remove electrical power if it is not necessary (Ref 24-22-00).

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 ALTERNATE GEAR EXTENSION HYDRAULIC PRESSURE SWITCH - REMOVAL/INSTALLATION
_________________________________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the hydraulic pressure switch for alternate extension of the landing gear. The second task installs the pressure switch.
 TASK 32-35-51-004-004
 2.  Remove the Hydraulic Pressure Switch (Fig. 401)____________________________________
 A.  References
 (1)  
AMM 06-41-00/201, Fuselage Access Doors and Panels

 (2)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 (3)  
AMM 32-00-15/201, Landing Gear Door Locks.

 (4)  
AMM 32-00-20/201, Landing Gear Downlocks

 B.  
Access

 (1)  
Location Zones
 115 NLG Wheel Well (Left)
 116 NLG Wheel Well (Right)

 C.  
Prepare for the Removal

 S 484-017
 WARNING:_______  MAKE SURE THAT THE DOWNLOCKS ARE INSTALLED IN ALL OF THE LANDING GEAR. WITHOUT THE DOWNLOCKS, THE LANDING GEAR CAN RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
 S 494-006
 WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Open the doors for the nose landing gear and install the door locks (AMM 32-00-15/201).

 S 864-007

 (3)  
Remove the pressure from the left hydraulic system
 (AMM 29-11-00/201).

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HYDRAULIC 
PRESSURE SWITCH 
SEE  B 
NOSE 
WHEEL WELL 
SEE  A 

NOSE WHEEL WELL 
A 
ELECTRICAL 
CONNECTOR 
TEE 

LOCKWIRE
HYDRAULIC PRESSURE SWITCH
B

Alternate Gear Extension Hydraulic Pressure Switch Installation
Figure 401

FWD
 

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 D. Procedure to Remove the Switch
 S 034-008
 (1)  
Disconnect the electrical connector from the hydraulic pressure switch.

 S 024-009

 (2)  
Loosen the pressure switch and remove it from the tee.

 TASK 32-35-51-404-010
 3.  Install the Hydraulic Pressure Switch (Fig. 401)_____________________________________
　
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