(b)
After 10 days deflate the shock strut and add oil until it is completely full. Then service the shock strut with nitrogen (AMM 12-15-04/301).
(c)
Do the 5 and 10 day servicing steps again until you change the seals.
S 982-150
(7)
If the leakage was more than 30 drops during the 15 minute period, the shock strut is not serviceable. You must replace the seals.
F.
Put the Airplane Back to its Usual Condition.
S 092-115
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1) Do this task: "Removal of the Door Locks from the Wing Landing Gear" (Ref 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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747-400 MAINTENANCE MANUAL
S 092-116
(2) Do this task: "Removal of the Door Locks from the Body Landing Gear" (Ref 32-00-30/201).
TASK 32-13-02-202-125
8. Scraper Ring Inspection And Optional Split Scraper Ring Installation for body_____________________________________________________________________________ Landing Gear (Fig. 202)____________
A. General
(1)
In several instances, scraper ring damage was found during servicing to install the spare seals. In some instances, a portion of the scraper ring was found protruding through the gland nut. In correcting these problems, some operators removed the landing gear from the airplane and disassembled the gear to install new seals and a new scraper ring. This procedure introduces an optional split scraper ring which can be installed without the removal of the gear or disassembly of the gear. Also, this procedure has two quick checks to examine the scraper ring while the landing gear is on the airplane.
(2)
These optional split scraper rings permit the operators to activate the spare seals or replace a damaged scraper ring without the removal of the gear or disassembly of the gear. These scraper rings have a beveled scarf joint which opens the ring to install around the inner cylinder of the gear.
(3)
The use of these optional split scraper rings is not recommended for the gear overhaul. The split scraper ring is for temporary replacement only. When you disassemble the gear, you must use the production scraper ring.
B.
References
(1)
09-11-00/201, Towing
(2)
32-00-30/201, Landing Gear Door Locks
C.
Consumable Materials
(1)
D00507 Hydraulic Fluid - MIL-H-6083
D.
Access
(1)
Location Zone
755 Body Landing Gear, LH
765 Body Landing Gear, RH
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E. Prepare for the Procedure
S 492-129
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Install the ground locks in all landing gear (Ref 09-11-00/201).
S 492-128
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
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