TM 5-3805-255-14
0101
HOUSING INSPECTION AND REPAIR
000101
NOTE
Refer to Figure 11 for dimension drawing of fan housing assembly.
1. Clean and inspect all parts IAW General Maintenance Instructions (WP 0019).
2. Remove four bolts (Figure 11, Item 9), bolt locks (Figure 11, Item 8), and bearing retainer plate (Figure 11,
Item 7) from housing (Figure 11, Item 2). Discard bolt locks.
CAUTION
Do not force or damage will occur to housing, bearings, and shaft. Failure to follow caution
may result in damage to fan drive assembly.
3. Gently tap front of shaft (Figure 11, Item 3) to remove with front and rear bearings (Figure 11, Items 4 and 6)
from rear of housing (Figure 11, Item 2).
4. Remove front oil seal (Figure 11, Item 1) from housing (Figure 11, Item 2). Discard seal.
5. Support front side of inner race of front ball bearing (Figure 11, Item 4) and press shaft (Figure 11, Item 3) out
from rear, removing both bearings (Figure 11, Items 4 and 6) and spacer (Figure 11, Item 5).
CAUTION
Only support bearings by inner race. Do not press through balls or damage will occur to
bearings. Failure to follow caution will result in bearing failure.
NOTE
Refer to dimensional drawing (Figure 11) and replace any part that does not meet
specifications.
Always check dimensions in more than one area and watch for unusual wear patterns.
Dimensional drawings are of latest housing assemblies only.
For earlier models, it is recommended that parts be inspected for wear and replaced with
new.
Check all parts for gouging caused by spinning against mating part. Replace part if worn
beyond specifications or gouged.
6. Check nut (Figure 11, Item 11) and drive gear (Figure 11, Item 10) for pitting and damaged teeth. Replace if
damaged.
7. Inspect shaft (Figure 11, Item 3) for damage due to front and rear bearings (Figure 11, Items 4 and 6) turning
on shaft. Replace if worn.
8. Inspect housing (Figure 11, Item 2) for damage from front and rear bearings (Figure 11, Items 4 and 6) turning.
Replace if damaged or worn beyond specifications.
9. Inspect bearing retainer plate (Figure 11, Item 7) for bending or wear from rear bearing (Figure 11, Item 6).
Replace if damaged.
10. Oil seal (Figure 11, Item 1) should be replaced every time drive is disassembled.
CAUTION
Anytime unbalance has occurred in fan mounting assembly, ball bearings should be
replaced due to possible damage. Failure to follow caution may result in damage to fan
housing assembly.
0101-12
