(12)
Lift the assembly out of the buildup stand.
(13)
Lower the main gear assembly.
S 584-039
S 584-040
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737-300/400/500MAINTENANCE MANUAL
S 584-041
(14)
Set the trunnion-link-drag strut apex onto the wood block on the hydaulic floor jack.
S 424-042
(15)
Install the main landing gear (AMM 32-11-00/401).
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737-300/400/500MAINTENANCE MANUAL
MAIN GEAR SHOCK STRUT - APPROVED REPAIRS
________________________________________
1. General_______
A. This subject has two tasks.
(1)
The first task replaces the active inner cylinder seals with the spare seals kept on the shock strut.
(2)
The second task has two parts:
(a)
To replace the active inner cylinder seals with the spare seals kept on the shock strut
(b)
To install more seals on the shock strut after all the spare seals have been used.
B.
Spare seals are kept in grooves in the shock strut lower bearing.
(1)
In the first groove is a T-seal (dynamic), and in the other, two O-rings (static seal).
(2)
The spare seals permit active seals to be replaced without shock strut inner cylinder removal.
(3)
When you install the last spare seal, the subsequent seal replacement requires the disassembly of the shock strut.
TASK 32-11-21-908-001
2. Active Inner Cylinder Seal Replacement with Spare Seals (Fig. 801)_______________________________________________________
A. Special Tools and Equipment
(1)
Ground Lock Assembly (AMM 32-00-01/201)
(2)
Gland nut wrench - F80033-1
B.
Standard Tools and Equipment
(1)
Dry air or nitrogen bottle capable of 2500 psi for servicing shock strut
(2)
Plastic tool for removing O-rings
(3)
Thin strip of metal to use to protect the cylinder surface material when cutting seals
(4)
Drip tray
(5)
Clean pieces of white cloth, new or laundered, containing less than 0.75% oil and free of silicone (Cloth padding to use to prevent damage to shock strut, when gland nut is unscrewed)
C.
Consumable Materials
(1)
D00070-025 Oil-Hydraulic, MIL-H-5606
(2)
D00250-003 Jelly-Petroleum, VV-P-236 Petrolatum (Ref 20-30-21)
(3)
C00308-41 Compound-Corrosion Preventive - MIL-C-11796, Class 3 (Ref 20-30-21)
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D.
E.
F.
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737-300/400/500MAINTENANCE MANUAL
(4)
G01395 Compound - Corrosion Inhibiting, BMS 3-27, Mastinox 6856KReferences
(1)
AMM 07-11-11/201, Jack Airplane
(2)
AMM 12-15-31/301, Main Landing Gear Shock Strut
(3)
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby
(4)
AMM 32-00-01/201, Ground Lock AssembliesAccess
(1)
Location Zone 310 Left Wing, Left Main Landing Gear 410 Right Wing, Right Main Landing Gear
Prepare to Replace the Seal
S 498-002
(1)
Do this task on the landing gear: "Install Gear Ground Lock Assembly" (AMM 32-00-01/201)).
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