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Page Title:
Table 6-30. Rear Fan and Accessory Drive Housing Assembly Overhaul Standards |
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 Table 6-30. Rear Fan and Accessory Drive Housing Assembly Overhaul Standards
Sizes and fits
Fig.
Ref.
Wear limits
of new parts
Component
Point of measurement
No.
letter
--
3.5444
Inside diameter of bearing support
3.5432
3.5440
Rear fan and B-26
Q
*
Outside diameter of bearing
3.5427
3.5433
accessory drive
R
0.0017L
Fit of bearing in support
0.0013L
0.0001T
housing
R-Q
2.1653
Outside diameter of bearing surface on
2.1655
2.1660
E
gearshaft assembly
*
Inside diameter of bearing
2.1648
2.1654
F
0.0001L
Fit of bearing on gearshaft assembly
0.0001T
0.0012T
F-E
*
T
Outside diameter of bearing
3.1491
3.1496
3.1504
Inside diameter of bearing support
3.1495
3.1501
U
0.0013L
Fit of bearing in support
0.0010L
0.0001T
U-T
1.5747
Outside diameter of bearing surface on
1.5749
1.5753
W
gearshaft
*
Inside diameter of bearing
1.5743
1.5748
X
0.0001L.
Fit of bearing on gearshaft
0.0001T
0.0010L
X-W
*
Outside diameter of bearing
3.1491
3.1496
Y
3.1504
Inside diameter of bearing support
3.1495
3.1501
Z
0.0013L
Fit of bearing in support
0.0010L
0.0001T
Z-Y
1.6250
Outside diameter of gearshaft
1.6244
1.6248
V
Rear fan and B-26
1.6275
Inside diameter of drive gearshaft
1.6260
1.6270
accessory drive B-27
AA
0.0030L
Fit of gearshaft in drive gearshaft
0.0012L
0.0026L
AA-V
housing
1.1813
Outside diameter of bearing surface on fuel
1.1814
1.1817
Fuel injection B-26
B
injection pump driven gearshaft
pump
spur
*
Inside diameter of bearing
shaftgear
1.1807
1.1811
D
Fit of bearing on gearshaft
0.0003T
0.0010T
D-B
0.0002T
*
Outside diameter of bearing
2.4404
2.4409
E
Inside diameter of liner in housing
2.4409
2.4416
2.4419
F
Fit of bearing in housing
0.0000
0.0012L
E-F
0.0015L
Inside diameter of liner in housing
1.5002
1.4995
1.5005
J
*
M
Outside diameter of needle bearing
1.4995
1.5000
Fit of needle bearing in housing
M-J
0.0007L
0.0005T
0.0010L
Outside diameter of needle bearing surface on
0.9995
1.0000
C
0.9993
gearshaft
*
Inside diameter of needle bearing
1.0000
L
0.9995
Fit of gearshaft in needle bearing
L-C
0.0005L
0.0005T
0.0007L
Fuel injection B-26
Inside diameter of oil seal bore in housing
1.7500
1.7510
K
spur B-26
1.7520
pump
*
Outside diameter of oil seal
N
1.7540
1.7580
shaftgear
Fit of oil seal in housing
N-K
0.0030T
0.0080T
0.0020T
I n s i d e diameter of bearing bore (small) in
2.6772
2.6779
G
2.6782
housing
*
Outside diameter of bearing
2.6767 2.6772
XX
Fit of bearing in housing
0.0000
0.0012L
XX-G
0.0015L
Inside diameter of bearing bore (large) in
3.1503
H
3.1496
3.1506
housing
Outside diameter of bearing
ZZ
3.1491
3.1496
Fit of bearing in housing
0.0000
0.0012L
ZZ-H
0.0015L
Outside diameter of bearing surface on
1.5749
1.5753
Rear
fan and B-26
P
1.5747
gearshaft
fuel
injection
*
Inside diameter of bearing
drive
1.5743
1.5748
YY
Fit of bearing on gearshaft
0.0001T
0.0010T
YY-P
0.0001L
Rear
fan and B-26
*
Inside diameter of bearing
1.5743
1.5748
AB
fuel
injection B-26
Fit of bearing on gearshaft
0.0001T
0.0010T
AB-P
0.0001L
drive
*
Inside diameter of injection advance bearing
2.3770
2.3780
S
Outside diameter of hub on advance unit cover
2.3745
2.3735
B
2.3730
Fit of cover in bearing
0.0025L
0.0045L
B-S
0.0050L
*
Note.
Refer
to
for
explanation
of
symbols.
6-154
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