E. Disconnect oil cooler outlet sensing line (16) at connection on forward end of oil cooler bypass valve (17). Remove packing and retainer.
500
Nov 15/67 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 79-21-11 Page 401
H29494
Fuel/Oil Cooler Installation 500
79-21-11 Figure 401 (Sheet 1) Nov 15/67
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
F. Disconnect main bearing oil pressure tube (4) at aft end of oil cooler outlet connector (3). Remove packing and retainer.
G. Disconnect No. 1 bearing oil pressure supply line (18) at forward end of oil cooler outlet connector (3). Remove packing and retainer.
H. Disconnect gearbox-to-oil cooler tube (5) at elbow on top rear of oil cooler. Remove packing and retainers.
I. Unfasten nuts holding fuel outlet line retaining plate (7) at rear of oil cooler and slide plate aft.
J. At upper right side of fuel inlet connector tube (14), remove three bolts securing fuel/oil cooler to forward mounting bracket (15).
K. At rear end of fuel/oil cooler, remove three bolts securing transmitter support bracket (9) to oil cooler. Remove bracket.
L. Hold oil cooler and remove remaining bolt securing oil cooler to aft mounting bracket (19).
M. Carefully remove fuel/oil cooler and fuel flow transmitter by easing assembly outward and then forward off from oil cooler to pressurizing and dump valve tube (fuel outlet line) (6).
N. Separate fuel/oil cooler from fuel flow transmitter by removing remaining nuts securing fuel inlet connector tube (14).
H29504
500 Fuel/Oil Cooler Installation
Aug 15/68 Figure 401 (Sheet 2) 79-21-11
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
4. Install Fuel/Oil Cooler
A. If not joined, assemble fuel/oil cooler and fuel flow transmitter by inserting aft end of fuel flow transmitter in transmitter support bracket (9, figure 401). Secure transmitter to fuel/oil cooler by installing fuel inlet connector tube (14) with bolts, nuts and washers. (Omit three forward mounting bolts, nuts and washers.) Use new packing on forward end of transmitter.
B. Position a new seal on oil cooler-to-pressurizing and dump valve tube (6). Position oil cooler and fuel flow transmitter assembly on engine and carefully move assembly aft to join oil cooler-to-pressurizing and dump valve tube (6).
C. Secure fuel inlet connector tube (14) to forward mounting bracket (15) using three mounting bolts and washers.
D. Secure rear end of fuel/oil cooler to aft mounting bracket (19) using one bolt, nut, and washer through the uppermost bolt hole.
E. Slide fuel outlet line retaining plate (7) forward and fasten to rear of fuel/oil cooler using three nuts.
F. Position transmitter support bracket (9) at fuel inlet connection (8) and aft mounting bracket (19). Secure bracket to oil cooler using three bolts, nuts and washers. Lockwire.
G. Install drain plug at bottom of fuel inlet connector tube (14) using new packing. Lockwire.
H. Connect fuel flow transmitter fuel inlet line at fuel inlet connection (8) using new seal washer.
I. Using new packing and retainers, connect gearbox to oil cooler line (5) at elbow on top rear of oil cooler. Lockwire.
J. Using new packing and retainer, connect No. 1 bearing oil pressure supply line (18) at forward end of oil cooler outlet connector (3). Lockwire.
K. Using new packing and retainer, connect main bearing oil pressure tube (4) at aft end of oil cooler outlet connector (3). Tighten nut to recommended torque and lockwire (Ref P&WA JT8D Maintenance Manual, 72-00 R/I).
L. Using new packing and retainer, connect oil cooler outlet sensing line (16) at connection on forward end of oil cooler bypass valve (17). Lockwire.
P&wA 79-22-1, Page 401, Aug 1/71; Feb 1/78
500
79-21-11 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/78
M. Connect two electrical connectors (11) to fuel flow transmitter (10).
N. Connect bonding jumper (12) at forward electrical connector on fuel flow transmitter.
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