S 864-004
(3)
Remove the hydraulic power of system No. 1 (AMM 29-11-00/201).
D.
Compensator Assembly Removal (Fig. 401)
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A
747-400
MAINTENANCE MANUAL
SEEA
O-RINGS
COMPENSATOR ASSEMBLY
VENT
METERING
VALVE
BODY
A
Steering Metering Valve Replacement Figure 401
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A
747-400 MAINTENANCE MANUAL
S 164-005
CAUTION:_______FULLY CLEAN THE SURFACES. FAILURE TO CLEAN THE SURFACES CAN CAN CAUSE CONTAMINATION TO GET IN SEALED AREAS WHEN YOU REMOVE THE COMPENSATOR ASSEMBLY. THIS CAN CAUSE DAMAGE TO THE EQUIPMENT.
(1)
Fully clean the external surfaces near the junction of the compensator assembly and the metering valve.
S 024-006
(2)
Remove the compensator assembly.
(a)
Remove the compensator assembly from the metering valve body.
(b)
Remove the O-rings from the compensator assembly.
TASK 32-51-11-404-007
3. Steering Metering Valve Compensator Assembly Installation_________________________________________________________
A. Special Tools and Equipment
(1)
8ME65B01202-1 - Nose Gear Torsion Link Holding Tool
B.
Consumable Materials
(1)
D00288 Lubricant - MCS 352
(2)
D00633 Grease - BMS 3-33 (preferred)
(3)
D00013 Grease - MIL-G-23827 (optional)
C.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
AIPC 32-51-04 Fig. 1
D.
Access
(1)
Location Zone
715 Nose Landing Gear
E.
Compensator Assembly Installation (Fig. 401)
S 494-008
WARNING: REFER TO AMM 32-00-30/201 FOR THE LOCK INSTALLATION PROCEDURE.
_______ THE FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT IF YOU DO NOT INSTALL THE LOCKS CORRECTLY.
(1) Make sure that you install the door lock of the nose landing gear (AMM 32-00-30/201).
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747-400 MAINTENANCE MANUAL
S 424-009
(2)
Install the compensator assembly.
(a)
Lubricate the new O-rings with lubricant.
(b)
Install the new O-rings on the compensator assembly.
(c)
Install the compensator assembly in the metering valve body and install the lockwire.
F.
Leakage Test
S 014-010
CAUTION:_______DO NOT LET THE TORSION LINK FALL. IF THE TORSION LINK FALLS, DAMAGE TO THE MOUNTING BRACKET OF THE SQUAT SWITCH CAN OCCUR.
(1)
Remove the apex bolt of the torsion link of the nose landing gear (Fig. 402).
(a)
Push the button and pull out the quick-release pin from the apex bolt.
(b)
Fully loosen the apex bolt and pull the apex bolt out from the bushing that has threads.
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