K. Remove air blast connector cap (9) and duct support plate (5) from generator frame.
NOTE: Note the position of cooling air blast connector cap elbow in relation to generator prior to cap removal for ease of installation.
3. Install Generator (Fig. 401)
A. Install duct support plate (5) and generator air blast connector cap (9) on generator frame in the same position as removed.
B. Loosen nuts on CSD studs leaving a gap of approximately 1/2 inch between CSD flange and underside of the nuts. Lubricate generator spline with approximately 1/2 cubic inch of anti-fretting compound.
C. Apply thin coating of DC4 or Mobilgrease 28 around generator mating surface on output end of transmission.
NOTE: Apply in a continuous coating around mating surface. Do not leave any bare spots and ensure there are no open areas around studs.
D. Raise generator into position on support so that generator flange holes and studs on constant speed drive align. Position generator so that terminal blocks are on left side of engine, so that the terminals line up with the generator lead wire terminals.
E. Mate generator and drive splines and slide generator forward. Keep flange holes and studs in alignment.
CAUTION: AVOID ROUGH HANDLING WHEN MATING MALE AND FEMALE SPLINES. SERIOUS DAMAGE MAY RESULT FROM GENERATOR STRIKING DRIVE SEAL RETAINER.
F. With generator flange in position against generator drive pad, rotate generator clockwise viewed from aft so that stud shanks fully penetrate slots in generator mounting flange.
G. Torque nuts from 160 to 190 pound-inches torque.
H. Place cooling air collector ring (7) around generator flange and instal1 tee-bolt nuts holding halves of collector ring together. Tighten tee-bolt nut locking collector ring halves.
I. Install exhaust duct (6), and bracket assembly (8).
J. Install cooling air inlet duct on generator, tighten clamps and jumper fasteners.
K. Install exciter leads to terminals (Ref WDM 24-21-11, -21). Assemble terminals, flatwasher, lockwasher and nut in that order. Tighten exciter terminal nuts from 20 to 25 pound-inches. Remove all tags attached in step 2.C.
L. Install generator leads to terminals. Assemble terminals, flatwasher, lockwasher and nut in that order. Tighten generator terminal nuts from 115 to 125 pound-inches. Remove all tags attached in step 2.C.
NOTE: Replace engine firewall fire detection sensing element and tighten release screws on quick-release clamps (Ref 26-11-11 R/I).
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H21278
500 Engine Driven AC Generator Installation
Aug 01/75 Figure 401 24-21-11
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
M. Check generator for voltage outputs.
(1)
Motor engine on which voltage output check is to be made.
WARNING: EXERCISE EXTREME CAUTION WHEN WORKING AROUND ENERGIZED EQUIPMENT. THE CURRENTS INVOLVED CAN BE FATAL.
(2)
Set selector switch to GEN 1 or GEN 2 AND MOMENTARILY PLACE GEN 1 or 2 switch on pilots' forward overhead panel to ON. AC voltmeter should indicate an output, the magnitude of which is dependent upon engine motoring RPM at the time.
N. Install covers on generator and exciter terminals.
O. Close engine cowl panels.
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AC APU GENERATOR - REMOVAL/INSTALLATION
1. General
A. The ac APU generator is identical to the engine driven generators. The installation of the APU generator differs from the others in this respect; it has a duct support bracket assembly installed on the exciter end cover with six screws, and two ears on the bracket have elongated holes used to hold the current transformer mount assembly. Nut plates are used with all the bolts for the current transformer and mount installation.
B. The APU generator may be removed with the APU installed or, for better access, with the APU removed and lowered.
2. Equipment and Materials
A. Anti-fretting compound - Sundstrand 730691 (preferred); Sundstrand 718050 (alternative); Sundstrand 688272 (alternative); or 1:1 mixture by weight of molybdenum disulfide, MIL-M-7866, and Rheotemp 500 (or Texaco Unitemp 500) grease (alternative) (Ref 20-30-21)
3. Remove APU AC Generator (Fig. 401)
A. If APU is not to be removed, open APU compartment access door and remove APU lower shroud (Ref 49-11-0 R/I).
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