(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)
(4)
G01395 Compound - Corrosion Inhibiting, BMS 3-27, Mastinox 6856K
D.
References
(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 Assemblies
E.
Access
(1)
Location Zone
310 Left Wing, Left Main Landing Gear
410 Right Wing, Right Main Landing Gear
F.
Prepare to Install Spare Seals on the Shock Strut
S 498-030
(1)
Do this task on the landing gear: "Install Gear Ground Lock Assembly" (AMM 32-00-01/201).
S 868-031
(2)
Do this task: "Remove Power from the A, B, or Standby Hydraulic System" (AMM 29-15-00/201).
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737-300/400/500MAINTENANCE MANUAL
(3) S 868-032Operate brakes eight times to remove pressure from the brake accumulator.
(4) S 868-033Open all landing gear circuit breakers, on panel P6, and attach DO-NOT-CLOSE tags.
S 868-034
WARNING: DO NOT LOOSEN VALVE BODY UNLESS SHOCK STRUT IS FULLY
_______ DEFLATED. AIR PRESSURE CAN BLOW THE VALVE BODY OUT, AND CAN CAUSE INJURY TO PERSONS.
THE CHARGING VALVE MUST REMAIN OPEN. INTERNAL PRESSURE CAN BLOW OUT THE GLAND NUT AND INJURE PERSONS.
A DESCENDING AIRPLANE CAN INJURE PERSONS AND DAMAGE EQUIPMENT.
(5) Remove the valve cap from the charging valve at top of shock strut to cause the shock strut to deflate. Loosen the outer hexnut two turns maximum.
NOTE: Fluid in the shock strut will start foaming immediately as
____ its pressure is reduced to ambient. Deflate the shock strut slowly to prevent loss of fluid through the air valve.
S 948-036
(6)
Put a container under the shock strut.
S 038-037
(7)
Remove the check valve.
S 688-038
(8)
Drain the oil from the strut.
S 438-039
(9)
When the shock strut is empty, install the check valve.
NOTE: The arrow on the check valve points up when the check valve
____ is installed.
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737-300/400/500MAINTENANCE MANUAL
G. Replace Inner Cylinder Seals
S 228-040
(1) Measure and write the distance the gland nut (12) extends below the outer cylinder (17), refer to Figure 801 (Sheet 2), view C.
NOTE: The dimension you will get here will be compared with the
____
dimension you will get in step G.(12)(g).
S 948-041
(2) Put the cloth padding around the shock strut inner cylinder below the gland nut (12) to prevent the sharp edge of the hole in the gland nut from damaging the inner cylinder if the gland nut is accidently allowed to slide down the inner cylinder when it is unscrewed from the outer cylinder.
S 948-043
CAUTION: CLEAN ALL HYDRAULIC FLUID, FROM LEAKS, FROM THE TIRES
_______
IMMEDIATELY. THIS FLUID CAN DAMAGE THE TIRES.
(3)
Put a drip tray under the shock strut to catch hydraulic fluid when the gland nut is removed.
S 018-045
(4)
Remove the gland nut.
(a)
Remove gland nut lockplate (1) on aft side of shock strut.
(b)
Use gland nut wrench to unscrew gland nut and slide nut to bottom of inner cylinder.
S 498-042
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