Engine Start Shaft Installation 506
76-11-41 Figure 401 (Sheet 1) Aug 15/77
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
503 Engine Start Shaft Installation
Feb 15/69 Figure 401 (Sheet 2) 76-11-41
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
E. Remove side cowl panels.
F. Remove fixed fairing. Refer to Fixed Fairing, Chapter 71.
3. Remove Engine Start Shaft
A. Remove two start cable end fitting cotter pins (8, figure 401) from engine start drum (4). Remove and tag cables to identify function and location. Remove cable guards (5) as required to free cables.
B. Remove washers and locknuts securing push-pull cable brackets to support bracket studs (20).
C. Remove locknut (19) and washer (18) retaining engine start crank (17) and remove start crank from engine start shaft (14). Spacer (16) above start crank will fall free when start crank is removed.
D. Remove locknut (9) and washer (10) securing engine start drum (4) to engine start shaft (14) and remove drum.
E. Remove spacer (11) from engine start shaft (14).
F. Push up on engine start shaft (14) from below until start shaft upper bearing (12) clears engine thrust shaft and remove engine start shaft. Remove upper bearing (12).
G. If desired, start shaft bushings (13,15) may be removed or replaced while the start shaft is removed.
H. To remove start shaft lower bearing, the following procedure may be used, (optional).
(1)
Remove start shaft lower bearing retaining nut from position inside lower end of thrust shaft using a spanner wrench.
(2)
Insert start shaft down thru thrust shaft and push start shaft lower bearing out bottom of thrust shaft.
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76-11-41 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 15/69
4. Install Engine Start Shaft
A. If start shaft lower bearing is not installed in lower end of engine thrust shaft, install it as follows:
(1)
Push start shaft lower bearing up into lower portion of engine thrust shaft.
(2)
Retain start shaft lower bearing by installing start shaft lower bearing retaining nut. Tighten nut with spanner wrench.
B. Check that start shaft bushings (13, 15) are installed on engine start shaft (14) before installing start shaft.
C. Insert engine start shaft (14) down thru open upper end of engine thrust shaft.
D. Install start shaft upper bearing (12) and spacer (11) on upper end of start shaft (14). Use spacer to push bearing (12) down over bushing (13).
E. Install engine start drum (4) on splined upper portion of engine start shaft (14) with indexing (wide) tooth and valley mated.
F. Secure start drum using washer (10) and locknut (9). Tighten locknut to torque of 100 to 140 pound-inches.
G. Position engine start push-pull cable bracket over push-pull cable support bracket studs (20).
H. Place spacer (16) on lower end of engine start shaft (14).
I. Position engine start crank (17) on splined lower portion of start shaft (14) with indexing (wide) tooth and valley mated.
J. Retain spacer (16) and start crank (17) on start shaft (14) using washer (18) and locknut (19). Tighten locknut to torque of 100 to 140 pound-inches.
K. Secure engine push-pull cable brackets to push-pull cable support bracket studs (20) using two washers and locknuts.
L. Install two engine start control cables on engine start drum using new cotter pins (8) to retain cables. Remove identification tags and install removed cable guards (5).
Nov 15/67 76-11-41 Page 405 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
M. Adjust and test engine start control system for applicable engine (Ref 76-11-0,
Adjustment/Test).
5. Restore Airplane to Normal Configuration
A. Install access door No. 6301 or 6401 in wing leading edge above wing-to-engine fairing (Ref Chapter 12, Access Doors and Panels).
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