PRESSURE OIL EXTERNAL TUBES - REMOVAL/INSTALLATION
1. Remove Pressure Oil External Tubes
A. Open left side cowl panel.
B. Mark location of supporting clips and brackets to facilitate proper installation. (See figure 401.)
C. Remove support clips, then disconnect and remove No. 6 bearing external oil pressure tube from rear left side of engine.
D. Disconnect and remove No. 2 and 3 bearings external oil pressure tube from between main bearing oil pressure tube and gearbox upper rear elbow.
E. Disconnect oil pressure transmitter sensing line from main bearing tube.
F. Disconnect and remove main bearing oil pressure tube from left side of engine.
G. Disconnect and remove No. 1 bearing oil pressure supply line from between oil cooler outlet connector and adapter at bottom of inlet case.
2. Install Pressure Oil External Tubes
A. Using new packings, retainers, ferrules and backup rings as indicated, install following pressure oil external tubes:
(1)
No. 1 bearing oil pressure supply line between oil cooler outlet connector and inlet case tubes adapter, bottom of inlet case (retainer and packing at each end).
(2)
Main bearing oil pressure line, left side of engine (packing and retainer at oil cooler outlet connector, packing and retainer at diffuser outer duct center elbow). Connect oil pressure transmitter sensing line to main bearing tube.
(3)
No. 2 and 3 bearings external oil pressure tube between main bearing and the gearbox upper rear elbow (nut, packing, and retainer at brazed ferrule end; nut, ferrule, packing, and retainer at other end).
(4)
No. 6 bearing external oil pressure tubes, rear left side of engine (retainer and packing at each end).
B. Tighten all tube nuts to recommended torque. (Refer to Chapter 72, Engine.) Lockwire nuts.
C. Reinstall clips and brackets. Secure with screws.
D. Close left side cowl panel.
E. Test engine in accordance with Power Plant Repair Reference Table, Test A and allow oil temperature to reach 40°C during test. Refer to Chapter 71, Power Plant.
Nov 15/72 79-21-31 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
H27724
Pressure Oil External Tubes Installation 542
79-21-31Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 1/76
SCAVENGE OIL EXTERNAL TUBES - REMOVAL/INSTALLATION
H30183
1. Remove Scavenge Oil External Tubes
A. Open left side cowl panel.
B. Remove following scavenge oil tubes from engine.
(1)
No. 1 bearing oil scavenge tube from lower side of engine. (See figure 401.)
(2)
No. 4 bearing oil scavenge tube from between gearbox and lower left side of engine.
2. Install Scavenge Oil External Tubes
A. Using new retainers, packing and ferrules as indicated, install the following scavenge oil tubes.
(1)
No. 1 bearing oil scavenge tube using two retainers and two packings. Tighten nuts to required torque and then lockwire.
NOTE: Install packing and plug for engines not equipped with chip detector, but having a T-fitting on gearbox end and lockwire plug.
(2)
No. 4 bearing oil scavenge tube using a ferrule, packing and retainer. Tighten nut to required torque. (Refer to Chapter 72, Engine.) Lockwire nut.
NOTE: Install packing and plug for engines not equipped with chip detector, but having a T-fitting at diffuser outer duct end and lockwire plug.
NOTE: Make sure there are two temperature indicators attached correctly. It must be possible to see the indicators when the tube is installed on the engine. do the inspection procedures in P&W S/B 5944 or 6101, as applicable.
B. Close left side cowl panel.
C. Test engine in accordance with Power Plant Repair Reference Table, Test A and allow oil temperature to reach 40°C during test. Refer to Chapter 71, Power Plant.
500 Scavenge Oil External Tubes Installation
May 01/00 Figure 401 79-21-41
Page 401
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