757
MAINTENANCE MANUAL

 S 213-147
 (9)  
Use the procedures in Power Plant Operation (Cold Weather) (AMM 71-00-00/201) to keep the engine oil temperature above -40°F (-40°C).

 S 603-076

 (10)
 Fill the IDG with oil as required (AMM 12-13-03/301).

 NOTE: If the IDG is serviced for cold weather operation, use the
____ preferred oil, MIL-L- 7808 instead of MIL-L-23699 lubricant. The only MIL-L-7808 lubricant approved for Sundstrand IDGs is Exxon 2389.
 S 213-077
 (11)
 Visually check the wing lower surface for fuel leaks.

 S 213-078

 (12)
 Visually check the landing gear.

 (a)  Wipe the inner cylinder with a clean cloth to check for hydraulic leakage from the seals.
 S 213-079
 (13)
 Check the landing gear tire pressure and inflate as required (AMM 12-15-03/301).

 S 213-080

 (14)
 Check the main landing gear shock strut fluid (AMM 12-15-01/301).

 S 213-081

 (15)
 Check the nose landing gear shock strut fluid (AMM 12-15-02/301).

 S 863-083

 (16)
 Do these steps immediately before flight:

 CAUTION: DO NOT APPLY GROUND ELECTRICAL POWER BEFORE THE FLIGHT
_______
 DECK TEMPERATURE HAS REACHED -4°F (-20°C).

 (a)  Provide electrical power (AMM 24-22-00/201).
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757
MAINTENANCE MANUAL

 (b)  Turn on the hydraulic system electric motor pumps 30 minutes before starting the engines (AMM 29-11-00/201).
 NOTE: This will make sure the hydraulic system operates
____ normally and will prolong the life of the components.
 1)  Make sure these electric pump switches are in the ON position, on the overhead Hydraulic Control Panel. a) HYD PUMPS C ELEC I b) HYD PUMPS C ELEC 2 c) HYD PUMPS L ELEC d) HYD PUMPS R ELEC
 2)  If the hydraulic pressure in one system increases, then drops to zero, do these steps:
 NOTE:____Repeat the steps a maximum of three times. After three times (cycles), you must find the cause of the pressure drop.
 a) Turn the electric motor pump OFF. b) Turn the electric motor pump ON. 3) Leave the motor pumps running until the engine-driven pumps are operating.
 S 863-084
 (17) At ambient temperatures below -22°F (-30°C), pump the brake pedals eight (8) times shortly before starting the engines. At each wheel, verify extension/retraction of brake pistons.
 (a)  If brake operation is not normal, do these steps: 1) Provide local warming to the brake. 2) Do the Antiskid/Autobrake System - Functional Test
 (AMM 32-42-00/501).
 NOTE: Do the tasks for the brakes only:
____ System Interface, Antiskid Brake Release, and Autobrake Application.
 To do an operational check with the Antiskid Brake Release task, you do not need to install pressure gages at each brake. As an alternative to this, make sure that there is brake piston movement.
 3) Repeat the test until proper operation is observed. 4) If the difficulty continues, replace the brake (AMM 32-41-10/401).
 S 203-087
 (18) Make sure the fuel temperature is at least 6°F (3°C) above the fuel freeze point, based on the ASTM method for determining freeze point.
 (a)  The fuel temperature must remain above -40°F (-43°C).
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A

757 MAINTENANCE MANUAL
 S 213-088
 (19)
 Prepare the airplane for flight (AMM 12-33-01/301).

 S 863-089

 (20)
 Start the engines (Cold Weather) (AMM 71-00-00/201).

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