(3)  
Depressurize the hydraulic system reservoirs (Ref 29-11-0/201) to remove the hydraulic pressure from the return lines.

(4)  
Put a container under the shuttle valve.

B.  Open the air conditioning equipment bay doors.
2.  Shuttle Valve Removal (Fig. 401)
A.  Disconnect the hydraulic lines from the ports on the shuttle valve.
B.  Install protective caps on the hydraulic lines and in the ports on the shuttle valve.
C.  Remove the bolts, nuts, and washers that secure the shuttle valve to the bulkhead. Remove the shuttle valve.
D.  Remove the restrictor and O-ring from the shuttle valve. Discard the O-ring.
E.  Remove the unions and O-rings from the shuttle valve. Discard the O-rings.
3.  Shuttle Valve Installation (Fig. 401)
A.  Install the unions and new O-rings in the shuttle valve.
B.  Install the restrictor and a new O-ring in the shuttle valve.
C.  Put the shuttle valve on the bulkhead and attach it with two bolts, two washers, and two nuts.
D.  Remove the protective caps from the hydraulic lines and the shuttle valve.
E.  Connect the hydraulic lines to the shuttle valve.
4.  Return the Airplane to Normal
A.  Service the hydraulic system (Ref 12-12-0/201).
B.  Remove the DO-NOT-OPERATE tag and move the landing gear selector lever to the down position.
C.  Pressurize the hydraulic system (Ref 29-11-0/201 and 29-12-0/201).
D.  Operate the thrust reverser (Ref 78-32-01/501) and look for leakage at the shuttle valve.
WARNING:  KEEP PERSONS AWAY FROM THE THRUST REVERSERS WHEN THEY OPERATE. THRUST REVERSER OPERATION CAN CAUSE INJURY.
E.  Close the air conditioning equipment bay doors.
May 01/99 78-34-22 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

E03369
Thrust Reverser Shuttle Vavle Installation  545 
78-34-22Page 402   Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 20/94 

THRUST REVERSER PUSH-PULL CABLE - REMOVAL/INSTALLATION
1.  General
A.  The thrust reverser push-pull cable installation consists of a rigid pushrod and a push-pull cable. The pushrod and push-pull cable can be removed and installed as separate units. The push-pull cable can be uncoupled at a quick-disconnect to allow the forward and aft cable subassemblies to be removed as separate units. The forward cable subassembly is supported entirely at the engine firewall. The aft cable subassembly is attached entirely to the thrust reverser assembly.
2.  Equipment and Materials
A.  Lubricant -- Grease, Dow Corning 33 Light Grade, Dow Corning Corp., Midland, Michigan or equivalent
B.  Thrust Reverser Isolation Valve Ground Lock Cap and Pin Assembly - F80109-3 or F80109-9 or equivalent
3.  Prepare for Removal
A.  With reverser in the forward thrust position, deactivate thrust reverser hydraulic system by installing ground locks on both thrust reverser isolation valves.
WARNING:  SERIOUS INJURY CAN RESULT TO PERSONNEL IF GROUND LOCKS ARE NOT PROPERLY INSTALLED. ATTEMPT TO DEPLOY THRUST REVERSERS AFTER INSTALLING GROUND LOCKS. REVERSERS SHOULD NOT DEPLOY.
B.  Remove engine side cowl panels (Ref Chapter 71).
C.  Remove engine midfairing forward and midaccess panels on both sides of fairing to gain access to forward end of push-pull cable and cable pushrod.
D.  Remove wing-to-engine forward fairing (Ref Chapter 54).
E.  Remove large access panel at aft end of midfairing just forward of thrust reverser (inboard side panel on engine No. 1 strut and outboard side panel on engine No. 2 strut).
F.  Remove wing access panel 6301 on left wing or 6401 on right wing to gain access to thrust reverser follow-up cam (Ref Chapter 12, Access Doors and Panels).
506 
May 01/03  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  78-34-32 Page 401 

G.  Remove tailpipe fairings to gain access to aft rigid section of push-pul1 cable (Ref 78-32-162).
H.  Remove feedback control access panel to gain access to feedback control lever.
4.  Remove Thrust Reverser Push-Pull Cable
A.  Uncouple push-pull cable at quick disconnect located above aft end of engine just forward of thrust reverser tailpipe extension. Thrust reverser must be in forward thrust position in order to uncouple cable at quick disconnect (Fig. 401).
NOTE:  If outer sleeve of quick disconnect is jammed, it can be loosened by inserting screwdriver between wrenching flat on forward connector terminal and forward lip of outer sleeve.
B.  Remove aft cable and conduit assembly.
　
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