29-11-02
ALL ú ú 02 Page 410 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
ENGINE-DRIVEN PUMP (EDP) - REMOVAL/INSTALLATION
_______________________________________________
1. General_______
A. This procedure has two tasks. The first task removes the engine-driven pump. The second task installs the engine-driven pump.
NOTE: If the EDP is being replaced, you will be required to replace the pressure and case drain filters. Do not replace the filters due to external pump leakage alone.
B. When an engine-driven hydraulic pump is replaced due to mechanical failure, flush the affected section of the pressure and case drain lines between the appropriate EDP and down stream Case Drain and pressure filters (AMM 29-11-00).
NOTE: If the EDP is being replaced due to overheat, it is recommended that the operator analyze the affected system fluid for contamination in excess of AMM 29-00-00, Table 601 limits.
TASK 29-11-05-004-001
2. Remove the Engine-Driven Pump (EDP) (Fig. 401)___________________________________
A. Equipment
(1) Bucket, 1 gallon capacity - commercially
available
B. References
(1)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
(2)
AMM 29-11-17/401, Left and Right System EDP Filter Module R&I
(3)
AMM 71-11-04/201, Fan Cowl Panels
(4)
AMM 78-31-00/201, Thrust Reverser System
C. Access
(1)
Location Zones
411/421 Engine
211/212 Control Cabin
(2)
Access Panels
413AL/414AR Fan Cowl
423AL/424AR Fan Cowl
D. Procedure
S 864-088
CAUTION:_______DO NOT HANDLE THE HYDRAULIC PUMP BY THE DRIVE SHAFT. DOING SO MAY DAMAGE OR COMPROMISE THE SHAFT SEAL AND CAUSE SHAFT SEAL LEAKAGE.
(1) Remove the pressure from the left or right hydraulic system and reservoir (AMM 29-11-00/201).
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