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A

757
MAINTENANCE MANUAL

NOSE GEAR  MAIN GEAR
MINIMUM SHOCK STRUT EXTENSION DIM "A" = 11.46 INCHES NOTE: FULLY COMPRESSED STRUT: DIM "A" = 9.46 INCHES
DIM "B" = 14.46 INCHES NOTE: FULLY COMPRESSED STRUT: DIM "B" = 12.46 INCHES
Landing Gear Shock Strut Extension Requirements
Figure 201A

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757 MAINTENANCE MANUAL
 (i)  
Make sure the airplane brakes are released.

 (j)  
757-200 AIRPLANES; Make sure the airplane center of gravity is below the GROUND STABILITY LIMIT line in Figure 202.

 S 862-003
 (2)  
Supply electrical power to the airplane (AMM 24-22-00).

 S 862-004

 (3)  
Supply right system hydraulic power (or left system hydraulic power if the right system does not operate) (AMM 29-11-00).

 S 212-006

 (4)  
Do a check of the brake system.

 (a)  Make sure the hydraulic brake pressure is 3000 |100 psi.
 NOTE: The BRAKE PRESSURE indicator gage is found on the pilots
____ center instrument panel, P3.
 CAUTION: TO TOW THE AIRPLANE WITH BRAKES THAT WILL OPERATE, YOU
_______ MUST HAVE 2800 TO 3000 PSI IN THE ACCUMULATOR. THERE IS A LIMIT TO THE NUMBER OF BRAKE APPLICATIONS AVAILABLE FROM ACCUMULATOR PRESSURE. WHEN HYDRAULIC PRESSURE IN THE ACCUMULATOR IS ZERO THE AIRCRAFT WILL NOT STOP WHEN THE BRAKES ARE APPLIED. DAMAGE TO THE AIRPLANE OR GROUND EQUIPMENT CAN OCCUR.
 (b)  If electrical power is not available, you must have a minimum of 2800 psi in the accumulator. You can apply the brakes approximately 2 to 3 times when the accumulator pressure is 2800 psi.
 S 582-007
 CAUTION: DO NOT PERMIT THE LOADS ON THE NOSE LANDING GEAR (WHILE THE
_______ AIRPLANE IS IN A TURN) TO BE MORE THAN THE SPECIFIED LOADS. IF YOU APPLY MORE LOADS THAN ARE SPECIFIED, STRUCTURAL DAMAGE TO THE LANDING GEAR CAN OCCUR.
 ú (5)  757-200 Airplanes Make sure the maximum permitted tow loads, for the nose landing gear, are not more than those specified in Figure 203.
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757 MAINTENANCE MANUAL
64
60
56
52
48
44
40
36
32
28

AIRPLANE CENTER OF GRAVITY
(PERCENT MAC)

100 120 140 160 180 200 220 240
AIRPLANE GROSS WEIGHT (1000 LB)
757-200
Towing Center of Gravity Limitation
Figure 202 (Sheet 1)

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757 MAINTENANCE MANUAL
1120
AIRPLANE CENTER OF GRAVITY
(BODY STATION)

1110
1100
1090
1080
1070
1060
1050
1040

757-200
Towing Center of Gravity Limitation
Figure 202 (Sheet 2)

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