S 434-026
CAUTION:_______MAKE SURE YOU INSTALL THE O-RING ON THE PUMP DRIVE SPLINE. THE O-RING PREVENTS LEAKAGE OF OIL FROM THE ENGINE GEARBOX.
(6)
Install a new O-ring (5) on the pump drive spline.
S 644-027
(7)
Lubricate new O-rings (10, 12, 14, 16, 22, 24) and backup rings (11, 15, 23) with hydraulic lubricant or hydraulic fluid.
S 434-029
(8)
Install new O-rings (10, 12, 14, 16, 22, 24) and backup rings (11, 15, 23) on adapters (9, 13, 21).
(9)
Remove all plugs from hydraulic pump (6) ports.
S 644-032
(10)
Lubricate the threads on the adapters/unions (9, 13, 21) with hydraulic lubricant or hydraulic fluid.
S 434-034
(11)
Install the adapters/unions (9, 13, 21) in the hydraulic pump (6) ports.
S 434-031
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-05
ALL ú ú 01 Page 406 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL
S 434-037
(12)
Tighten adapter (9) in the pump case drain port to 266-294 pound-inches.
S 434-036
(13)
Tighten adapter (13) in the pump pressure port to 713-787 pound-inches.
S 434-038
(14)
Tighten adapter/union (21) in the pump supply port to 855-945 pound-inches.
S 614-040
(15)
If the pump (6) is not filled with hydraulic fluid, add fluid through the case drain port.
S 424-041
(16)
Put the pump (6) in position and carefully engage the pump drive shaft with engine drive shaft.
NOTE: Do not lubricate the pump drive shaft, the spline is
____
lubricated by engine oil.
S 424-084
(17)
Turn the pump to let the nuts (2) go through the holes in the flange on the pump.
S 424-042
(18)
Turn the pump (6) counterclockwise until the small ends of the slots in the pump are hard against the engine gearbox studs.
S 434-043
(19)
Tighten the nuts (2) to 260-320 pound-inches.
S 434-044
(20)
Remove all caps from the self-seal fittings (17, 20, 25) on the hydraulic hoses.
S 434-045
CAUTION: DO A CHECK OF THE EDP SUPPLY HOSE FOR A KINKED OR CLOSED
_______ CONDITION. A KINKED OR CLOSED HOSE CAN CAUSE FAILURE OF THE ENGINE-DRIVEN PUMP.
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