601.

 (f)  
Fill all the reservoirs before the flight.

 (g)  
Large quantities of hydraulic fluid in the area of the leak must not cause damage to the airplane equipment.

 B. Do a Check of the Hydraulic System External Leakage (Table 601)
 S 016-031
 (1)  
Get access to the component which has a leak.

 S 866-032

 (2)  
Make sure the component has pressure on it when you do a check of the leak rate.

 S 866-033

 (3)  
If possible operate the component.

 (4)  
Clean all surfaces of the component which has a leak.

 (5)  
Do a check of the leakage rate as shown in Table 601.

 S 166-034
 S 796-035
 NOTE: There are approximately 20 drops in a cubic
____
 centimeter and 75,700 drops in a gallon.

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 29-11-00
 ALL  ú ú 01 Page 617 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 ~.............................................................................. | Hydraulic System External Leakage Limits | | Table 601 | ~............................................................................... | | NORMAL OPERATION | DISPATCH LIMITS TO | | COMPONENTS | LIMITS *[1] | AVOID DELAY *[2] | ................................................................................ | Hydraulic Pumps *[3] | 5 Drops in a Minute | 10 Drops in a Minute *[4] | ................................................................................ | Hydraulic Motors | 5 Drops in a Minute | 10 Drops in a Minute *[4] | ................................................................................
 | Dynamic Seals for All  | 4 Drops in a Minute  | 15 Drops in a Minute  |
 | Actuators Except the  | (Stopped or in  | (Stopped or in  |
 ú| Flight Controls *[5]  | Operation)  | Operation)  |

 ú................................................................................ ú| Dynamic Seals for the | 8 Drops in a Minute | 30 Drops in a Minute *[4] | ú| Flight Controls | (Stopped or in | (Stopped or in | ú| | Operation) | Operation) | ú................................................................................ ú| Static Seals | 1 Drop in 10 Minutes | 1 Drop in 10 Minutes | ú................................................................................ ú| B Nuts, Tubing, Hoses | No leakage | No leakage | ú2........................…........................…............................1 ú
　
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