TM 5-3895-382-24
Illustration 92
Crankshaft rear seal.
(1) 0 mm (0 inch)
(2) 4.6 mm (0.18 inch)
(3) 6.9 mm (0.27 inch)
Three positions are allowed for installing the rear seal in the oil
seal housing.
Use a press and the rear seal installer in order to install the
seal at the correct depth. The rear seal installer hat two sides.
Use the correct side of the rear seal installer in order to press
the seal to the correct depth.
1.
The seal is at position (1) on new engines.
2.
If oil leaks through the seal at position (1), use the rear
seal installer in order to move the seal to position (2).
Position (2) is 4.6 mm (0.18 inch) from the rear housing
face.
NOTE:
If the crankshaft flange is worn at position (2), use
the modified seal driver to install the seal at
position (3). If the crankshaft flange is not worn,
first install the new seal at position (2). If the oil
leaks through the seal at position (2), move the
seal to position (3).
3.
If the oil leaks through the seal at position (2), use the
rear seal installer in order to move the seal to position
(3). Position (3) is 6.9 mm (0.27 inch) from the rear
housing face.
Position (3) can be used with a new seal if the following
conditions exit:
A wet clutch is not used.
The crankshaft is new.
The crankshaft palm area has been corrected.
Make sure that the seal is installed square in the
housing.
Illustration 93
Sealing area on the crankshaft for the rear seal.
4.
If oil leaks through the seal at position (3), install a new
seal or grind the crankshaft flange.
If all three seal positions have been used and the seal
leaks, the sealing area of the crankshaft flange can be
reground. The minimum diameter of the crankshaft
flange at the sealing area is 133.17 mm (5.243 inch).
The crankshaft flange requires a diameter that is
unmachined for a distance of 4.78 mm (0.188 inch) from
the rear end of the crankshaft.
Installing the Crankshaft Front Seal on Type 1 and
9RM Engines and Type 2 and 7BJ Engines
NOTE:
For a complete description of Type 1 and Type 2
engines, refer to the Systems Operation, Testing
and
Adjusting,
"Engine
Design"
for
more
information.
Table 25
Tools Needed
1U-7600
Slide Hammer Puller
1
9U-6210
Front Seal Installer
1
6-93
