*[1]  Install 0.060 wall steel bushing in 2.1212 maximum oversize hole. interference minimum, 0.0013; maximum, 0.0031.  Bushing  
*[2]  Bushing interference minimum, 0.0013; maximum 0.0031. Install NAS75-4 steel bushing or equivalent in 2.0093 maximum oversize hole.  
*[3]  Spline backlash measured at pitch diameter of spline.  
*[4]  Install NAS75-4 steel bushing or equivalent in 0.3754 maximum oversize hole. Bushing interference minimum, 0.0002; maximum, 0.0013. 
Landing Gear Selector Valve Control Quadrant Assembly Wear Limits 
Figure 601 (Sheet 3)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 
737-300/400/500MAINTENANCE MANUAL
 LANDING GEAR TRANSFER VALVE - REMOVAL/INSTALLATION
__________________________________________________
 1.  General_______
 A.  This procedure has these tasks:
 (1) 
The removal of the transfer valve.
 (2) 
The installation of the transfer valve.
 (3) 
An operational test of the transfer valve.
 B.  
The transfer valve is installed in the wheel well of the right main gear. It is on the keel beam, near the forward end of the wheel well.
 TASK 32-31-71-024-001
 2.  Landing Gear Transfer Valve Removal (Fig. 401)___________________________________
 A.  References
 (1) 
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby
 (2) 
AMM 32-00-01/201, Ground Lock Assemblies
 B.  
Access
 (1)  
Location Zones
 101, 102 Control Cabin
 217 Right Main Wheel Well
 C.  
Removal
 (1)  S 494-002Make sure the ground lock assemblies are installed in the nose and main landing gear (AMM 32-00-01/201). 
 (2)  S 864-025Open these circuit breakers and attach DO-NOT-CLOSE tags: (a) P6 Circuit Breaker Panel 1) LDG GEAR SYS XFR VALVE - PRIMARY CONTROL 2) LDG GEAR SYS XFR VALVE - SECONDARY CONTROL 
 (3)  S 864-026Remove power from hydraulic system A (AMM 29-15-00/201). 
 (4)  S 034-027Disconnect the electrical connector from the transfer valve (Fig. 401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 737-300/400/500MAINTENANCE MANUAL 
LANDING  
GEAR  LANDING  
RETURN  GEAR  
PRESSURE  
VALVE  
MOUNTING  
MOUNTING BOLT  
(4 LOCATIONS)  B SYSTEM  
PRESSURE  
B SYSTEM  
RETURN 
A SYSTEM  
RETURN  
A SYSTEM  
PRESSURE  
ELECTRICAL  
SOLENOID  CONNECTOR  
SUPPORT BRACKET 
Transfer Valve Installation for the Landing Gear 
Figure 401
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