(a)
Put tags on the hydraulic lines to identify the correct locations of the lines.
(b)
Disconnect the six hydraulic lines from the transfer valve.
(c)
Put caps and plugs in the lines and ports of the valve to prevent leakage and contamination.
S 024-029
(6) Remove the four mounting bolts and remove the valve.
TASK 32-31-71-424-003
3. Landing Gear Transfer Valve Installation (Fig. 401)________________________________________
A. General
(1)
After you install the landing gear transfer valve, you must do an operational test of the valve.
B.
References
(1)
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby
C.
Access
(1)
Location Zones
101, 102 Control Cabin
217 Right Main Wheel Well
D.
Installation
S 424-030
(1)
Put the transfer valve on the support bracket and install the four mounting bolts (Fig. 401).
S 434-031
(2)
Do these steps to connect the hydraulic lines to the transfer valve.
(a)
Remove the caps and plugs that you put on the hydraulic lines and ports for protection.
(b)
Connect the six hydraulic lines to the correct ports in the transfer valve.
(c)
Remove the tags that you put on the hydraulic lines to identify the correct locations.
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A 737-300/400/500MAINTENANCE MANUAL
(3) S 434-032Connect the electrical connector to the transfer valve.
(4) S 864-033Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P6 Circuit Breaker Panel 1) LDG GEAR SYS XFR VALVE - PRIMARY CONTROL 2) LDG GEAR SYS XFR VALVE - SECONDARY CONTROL
(5) S 864-034Pressurize hydraulic systems (AMM 29-15-00/201).
(6) S 794-035Make sure there are no leaks at the hydraulic line connections.
(7) S 714-036Do the task which follows: Test". "Landing Gear Transfer Valve Operational
TASK 32-31-71-714-004
4. Landing Gear Transfer Valve Operational Test
____________________________________________
A. General
(1)
The transfer valve is in the wheel well of the right main gear. It is on the keel beam, near the forward end of the wheel well.
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby
(3)
AMM 32-00-01/201, Ground Lock Assemblies
C.
Access
(1)
Location Zone
101, 102 Control Cabin
202 Lower Nose Compartment
217 Main Wheel Well Right
(2)
Access Panels
1103 Forward Access Door
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A
737-300/400/500MAINTENANCE MANUAL
D. Operational Test
S 864-005
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-006
(2)
Remove power from hydraulic system A (AMM 29-15-00/201).
S 494-007
(3)
Make sure the ground lock assemblies are installed in the nose and main landing gear (AMM 32-00-01/201).
S 864-011
(4)
Make sure these circuit breakers are closed:
(a)
P6 Circuit Breaker Panel 1) LDG GEAR SYS XFR VALVE - PRIMARY CONTROL 2) LDG GEAR SYS XFR VALVE - SECONDARY CONTROL
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