3. SPARE DYNAMIC SEALS
LOWER
4. SPARE STATIC SEALS
SCRAPER
SEE GLAND NUT
OUTER CYLINDER
LOCK KEY GLAND NUT
(SHOWN WITH THE LOWER BEARING INSTALLED)
A-A
A

Main Landing Gear Shock Strut Seals Replacement
Figure 201

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757 MAINTENANCE MANUAL
STRAP

INNER CYLINDER
RETAINER
GLAND NUT

MLG Lower Bearing Puller Equipment
Figure 202 (Sheet 1)

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A

757
MAINTENANCE MANUAL

OUTER CYLINDER
STRAP
MINIMUM  MINIMUM
FORCE
FORCE
ONLY

ONLY OUTER CYLINDER
RAM ASSEMBLY
SEE B DYNAMIC SEAL RING
ASSEMBLY
LOWER
BEARING SLIDE HAMMER
PULLER LOWERASSEMBLY BEARING
DO NOT PERMIT
THE PULLER
ASSEMBLY TO
TOUCH THE
GLAND NUT OR

GLAND NUT RAG FOR GLAND
SCRAPER RING
NUT PROTECTION

RAM ASSEMBLY
DYNAMIC SEAL INSTALLATION  LOWER BEARING INSTALLATION
RAM
B

MLG Lower Bearing Puller Equipment
Figure 202 (Sheet 2)

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MAINTENANCE MANUAL

LOCK ASSEMBLY
INNER CYLINDER

LOCK ASSEMBLY FOR SPACER AND SEAL RETAINER
MLG Lower Bearing Puller Equipment
Figure 202 (Sheet 3)

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MAINTENANCE MANUAL

 S 212-096
 (5)  If there was leakage between 1 and 15 drops during the 15 minute period, do the steps that follow:
 NOTE: 20 drops is equal to 1.0 cc.
____
 CAUTION: A DEFLATED OR FLAT STRUT CAN CAUSE DAMAGE DURING LANDING.
_______ IF THE AIRPLANE LANDED WITH A DEFLATED OR FLAT STRUT, DO A HARD LANDING INSPECTION PER AMM 05-51-01/201 TO MAKE SURE THERE IS NO DAMAGE.
 (a)  
Continue to monitor the strut for leakage on subsequent landings. After 10 days service the shock strut with nitrogen and make sure the "x" dimension in the servicing chart is correct (AMM 12-15-01/301).

 (b)  
After 20 days deflate the strut and add oil until it is completely full. Then service the shock strut with nitrogen (AMM 12-15-01/301).

 (c)  
Do the 10 and 20 day servicing steps again until you change the seals.

 S 212-097
 (6)  If there was leakage between 16 and 30 drops during the 15 minute period, do the steps that follow:
 NOTE: 20 drops is equal to 1.0 cc.
____
 CAUTION: A DEFLATED OR FLAT STRUT CAN CAUSE DAMAGE DURING LANDING.
_______ IF THE AIRPLANE LANDED WITH A DEFLATED OR FLAT STRUT, DO A HARD LANDING INSPECTION PER AMM 05-51-01/201 TO MAKE SURE THERE IS NO DAMAGE.
 (a)  
Continue to monitor the strut for leakage on subsequent landings. After 5 days service the shock strut with nitrogen and make sure the "x" dimension in the servicing chart is correct (AMM 12-15-01/301).

 (b)  
After 10 days deflate the shock strut and add oil until it is completely full. Then service the strut with nitrogen (AMM 12-15-01/301).

 (c)  
Do the 5 and 10 day servicing steps again until you change the seals.

 S 212-098
 (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.
　
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