(a)
Remove the nut (10) and bolt (13) that attaches the clamp (12) to the bracket (11).
(b)
Remove the two nuts (16) that attach the ground adapter (17) to the accessory gearbox adapter.
(c)
Remove the nut (9) and bracket (11) that attaches the starter motor adapter (6) to the accessory gearbox (3).
(d)
Remove the nut (8) and washer (7) that attaches the starter motor adapter (6) to the accessory gearbox (3).
(e)
While you hold the starter motor adapter (6) in its position, remove the two nuts (14), two washers (15) and ground adapter (17).
(f)
Remove the starter motor adapter (6) from the accessory gearbox (3).
(g)
Remove the retaining ring (5) which holds the oil seal (4) in the accessory gearbox (3).
(h)
Use the seal extractor or an equivalent tool to remove the oil seal (4). 1) Discard the oil seal (4).
(i)
Make sure you install all necessary protection covers.
TASK 49-27-02-404-030
3. Main Driveshaft Oil Seal Installation (Fig. 401)_____________________________________
A. References
(1)
AMM 12-22-02/301, Auxiliary Power Unit
(2)
AMM 49-11-00/201, Auxiliary Power Unit
(3)
AMM 49-41-01/401, Starter Motor
B.
Consumable Materials
(1)
B00130 Alcohol, Isopropyl - TT-I-735
(2)
G00034 Cloth, Process Cleaning Absorbent Wiper (Cheesecloth, Gauze)
-BMS15-5
(3)
G50097 Lockwire, Corrosion Resistant Steel (0.025 Inch Diameter) -MS9226-03 (PWC05-089)
(4)
D00418 Oil - Aircraft Turbine Engine
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A
747-400
MAINTENANCE MANUAL
FWD
FWD
SEE A
SEE B
APU COMPARTMENT
A
SEE C
FWD
B
Main Driveshaft Oil Seal Installation
Figure 401 (Sheet 1)
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M34277
A
747-400
MAINTENANCE MANUAL
ACCESSORYGEARBOX ADAPTER
2. PACKING WITH RETAINER
(4 LOCATIONS) ADAPTER 17. GROUND
16. NUT3. ACCESSORY
1. BOLT
(2 LOCATIONS) GEARBOX(4 LOCATIONS)
15. WASHER
(2 LOCATIONS)
ALIGNMENT
PIN HOLE
14. NUT13. BOLT (2 LOCATIONS)
12. CLAMP
11. BRACKET
4.
OIL SEAL
5.
RETAINING RING
10. NUT
6. STARTER MOTOR9. NUT ADAPTERFWD
7.
WASHER
8.
NUT C
Main Driveshaft Oil Seal Installation
Figure 401 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
(5)
A00064 Sealant, Silicone Rubber - Silastic RTV 732 (PWC09-001)
C.
Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 2 | Packing With Retainer | 49-27-02 | 01 | 75 | | | 4 | Plain Seal (Oil Seal) | | | 65 | 2.......….......…...................................…...........…......….......1
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