are listed in AMM 20-30-21/201.Preferred (Pre-mixed) Shock Strut Fluids
(a)
BMS 3-32, Type I -This is MIL-H-6083 fluid pre-mixed with 1.5 percent by volume of Lubrizol 1395 and 1 percent by volume of mehtyl oleate.
(b)
BMS 3-32, Type II -This is MIL-H-5606 fluid pre-mixed with 1.5 percent by volume of Lubrizol 1395 and 1 percent by volume of mehtyl oleate.
Optional (Not Pre-mixed) Shock Strut Fluids
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737-300/400/500MAINTENANCE MANUAL
CAUTION: YOU MUST MIX SHOCK STRUT FLUIDS THAT ARE NOT PRE-MIXED
_______ BEFORE YOU FILL THE STRUT. IF YOU POUR UNDILUTED LUBRIZOL DIRECTLY INTO A STRUT IT CAN SETTLE TO THE BOTTOM AND NOT MIX CORRECTLY. UNDILUTED LUBRIZOL CAN ALSO CAUSE THE STRUT SEALS TO SWELL AND SOFTEN.
CAUTION: YOU MUST MIX 1 PART LUBRIZOL 1395 WITH 10 PARTS MIL-H-6083
_______ OR MIL-H-5606 TO DILUTE THE LUBRIZOL BEFORE YOU ADD IT TO THE STRUT. IF YOU DO NOT DILUTE LUBRIZOL BEFORE YOU ADD IT TO THE STRUT IT CAN CAUSE DAMAGE TO THE STRUT AND SEALS.
(a) MIL-H-6083 fluid plus 2.4 percent by volume of Lubrizol 1395 -This mixture can be made from any approved source for MIL-H-6083 and mixed with 2.4 percent by volume of Lubrizol 1395.
NOTE: Operators can choose to add 1.5 percent by volume of
____ Lubrizol 1395 and 1 percent by volume of methyl oleate instead of 2.4 percent by volume of Lubrizol 1395.
(b) MIL-H-5606 fluid plus 2.4 percent by volume of Lubrizol 1395 -This mixture can be made from any approved source for MIL-H-5606 and mixed with 2.4 percent by volume of Lubrizol 1395.
NOTE: Operators can choose to add 1.5 percent by volume of
____ Lubrizol 1395 and 1 percent by volume of methyl oleate instead of 2.4 percent by volume of Lubrizol 1395.
B. Special Tools and Equipment
(1) Low pressure servicing cart for MIL-H-5606, MIL-H-6083 hydraulic fluid or fully formulated shock strut fluid (AMM 20-30-21/201).
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A 737-300/400/500MAINTENANCE MANUAL
INFLATION INSTRUCTIONS
Main Landing Gear Shock Strut Servicing Chart
Figure 302
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F64469
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(2) Strut Inflation Tool - F70200-1
C. Standard Tools and Equipment
(1)
Hose to suit air charging valve
(2)
Suitable container to collect hydraulic fluid (approximately 5-gallon capacity)
D. Consumable Materials
(1)
Dry air or nitrogen bottle charged to 2500 psi minimum
(2)
Lubricant - (AMM 20-30-21/201)
(3)
D00467 Fluid - Fully Formulated BMS 3-32 Types I, II (Preferred)
(4)
D00212 Hydraulic Fluid MIL-H-5606 or MIL-H-6083 (Optional)
(5)
D00510 Lubrizol 1395 (Optional)
E. Prepare to Do the Servicing of the Shock Strut
S 483-033
WARNING: MAKE SURE THE GROUND LOCK PINS ARE INSTALLED ON ALL THE LANDING
_______ GEAR. WITHOUT THE GROUND LOCK PINS, THE LANDING COULD RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) If the groundlock pins are not installed on all the landing gear, do this task: Install the ground lock assemblies (AMM 32-00-01/201).
S 613-035
WARNING: CLEAR THE AREA BELOW THE WING BEFORE YOU DEFLATE THE SHOCK
_______ STRUT. IF YOU DEFLATE ONE SHOCK STRUT, THE WING TIP CAN MOVE DOWN AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
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