INDEX NO. PART NAME DIM. DESIGN LIMITS WEAR LIMITS REPLACE PART WORN REPAIR WORN PART REPAIR INSTR.
DIAMETER WEAR ALLOWED DIM. 2 DIAM CLEAR-ANCE MAX
MIN MAX
1 BRACKET ID 1.0010 1.0030 1.0050 0.0055 X 1
BEARING OD 0.9995 1.0000 0.9975 X
2 BEARING ID 0.4995 0.5000 0.5026 0.0044 X
BOLT OD 0.4982 0.4991 0.4956 X
3 BUSHING ID 0.5000 0.5010 0.5026 0.0044 X
BOLT OD 0.4982 0.4991 0.4966 X
REFER TO OVERHAUL MANUAL FOR REPAIR INFORMATION.
LIMITS SHOWN MAY BE EXCEEDED PROVIDED MAXIMUM CLEARANCE IS NOT EXCEEDED.
Body Gear Lower Drag Strut Wear Limits
Figure 202 (Sheet 2)
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S 842-005
(3) Remove pressure from hydraulic systems No. 1 and 4
(AMM 29-11-00/201).
S 862-006
WARNING: YOU MUST REMOVE THE WEIGHT OF THE AIRPLANE FROM THE LANDING
_______ GEAR. IF YOU DO NOT DO THIS, THE MAIN LANDING GEAR CAN TURN FORWARD ABOUT THE TRUNNION. IF THIS OCCURS, THE DRAG STRUT AND JURY STRUT WILL MOVE INBOARD. DAMAGE TO EQUIPMENT AND INJURY TO PERSONS CAN OCCUR IF THE DRAG STRUT AND JURY STRUT MOVE INBOARD.
(4)
Lift the airplane on jacks until the tires are clear of the ground (AMM 07-11-01/201).
F.
Procedure
S 032-007
(1)
Remove the downlock bungee (AMM 32-33-16/401).
S 492-008
(2)
Attach a sling to the lower drag strut (9) and hold it with a hoist.
S 492-009
WARNING: MAKE SURE YOU HOLD ALL PARTS SUFFICIENTLY BEFORE YOU REMOVE THE
_______ PINS. THE JURY STRUT ASSEMBLY WITH THE ACTUATOR WEIGHS APPROXIMATELY 45 POUNDS. THE UPPER DRAG STRUT WEIGHS APPROXIMATELY 120 POUNDS. THE LOWER DRAG STRUT WEIGHS APPROXIMATELY 77 POUNDS. IF YOU DO NOT HOLD THE PARTS SUFFICENTLY, DAMAGE TO EQUIPMENT AND INJURY TO PERSONS CAN OCCUR.
(3)
Hold the jury strut assembly and the upper drag strut to the structure with a sling.
S 032-010
(4)
Remove the bolt from the universal joint of the drag strut.
(a)
Remove the self-locking nut (13), the washer (14) and the lockbolt (15).
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747-400 MAINTENANCE MANUAL
(b) Remove the nut (16), the washer (17) and the bolt (12) with the lubrication insert (10).
S 032-011
(5)
Remove the apex bolt from the drag strut.
(a)
Remove the self-locking nut (8), the washer (7) and the lockbolt (6).
(b)
Remove the nut (5), the washer (4), and the apex bolt (1) with the lubrication insert (2).
S 022-012
(6) Remove the lower drag strut (9).
TASK 32-13-06-402-013
3. Body Landing Gear Lower Drag Strut Installation (Fig. 201)_______________________________________________
A. Special Tools and Equipment
(1)
G32031 Sling Assembly - Wing Landing Gear, Side and Jury Strut.
(2)
2MIT65B08802-1 - Body Landing Gear Bungee Restraining Tool
(3)
3PRE65B00163-1 - Protective Equipment - Body Gear Drag Strut Pin (Thread Protector)
B.
Standard Tools and Equipment
(1)
Portable Hoist - 500-pound capacity
C.
Consumable Materials
(1)
D00633 Grease - BMS 3-33 (preferred)
(2)
D00013 Grease - MIL-G-23827 (optional)
(3)
B00316 Cleaning Solvent - TT-N-95, Type I (preferred)
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