11. Remove and discard seal (Figure 3, Item 2) from gear housing (Figure 3, Item 1).
Figure 3. Gear Housing Disassembly.
END OF TASK
CLEANING AND INSPECTION
1. Thoroughly clean all parts IAW General Maintenance Instructions (WP 0019). Dry with compressed air.
2. Inspect gear housing (Figure 4, Item 1) for cracks or stripped threads in tapped holes.
3. Inspect bushing for wear or damage and replace if necessary.
4. Measure bushing depth at housing bore. Bushing should be 0.03 in. below bore face. Replace bushing if
greater than 0.03 in. Refer to Figure 5. If bushing is worn, replace as outlined in this work package under
5. Inspect upper (Figure 4, Item 12) and lower ball bearing (Figure 4, Item 6). If damaged or worn, replace.
6. Examine side cover (Figure 4, Item 4) for cracks or damage. Check clearance between spur shaft (Figure 4,
Item 3) and side cover bushing. If bushing is scored, damaged, or excessively worn, replace side cover and
bushing as an assembly.
7. Inspect spur shaft (Figure 4, Item 3) for damaged splines and/or threads. Examine sector gear teeth (Figure 4,
Item 5) for scuffing and scoring. Check that shaft outside diameter is 1.12 in. If excessive wear is evident at any
of these points, replace spur shaft.
8. Inspect bearing areas and thread groove on worm shaft (Figure 4, Item 11). If worm is galled, replace worm
shaft and ball nut as an assembly (Figure 4, Item 10).
9. Check worm ball nut teeth (Figure 4, Item 10) for scuffing and/or scoring. Inspect holes and passages for
obstructions. If damaged, replace worm shaft (Figure 4, Item 11) and worm ball nut teeth as an assembly.
10. Inspect threads on lower end of worm shaft (Figure 4, Item 11). Threads must be clean and free of nicks and
11. Inspect cup (Figure 4, Item 7) for wear or damage and replace if necessary.