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Assembly
Twin Disc, Incorporated
5.
Once rods are in place, draw together the thrust tube and socket by
tightening nuts on the rods. Perform this step by evenly applying pressure
to both sides of press fixture. Stop tightening when nuts become
extremely difficult to turn. Note the distance from the front end of the
socket flange to the aft end of the propeller shaft should be very close to
1810 mm (71.2 in.).
CAUTION
Do not attempt to pull thrust tube into thrust socket using retainer ring.
This can scratch the thrust ball and cause retainer ring to warp or break.
It can also cause a rough ball surface that will severely affect the sealing
integrity of the packing and o-ring arrangement.
Figure 70. Tightening the Aft Retainer using Special Wrench
132
6.
Inspect shims and ensure that they are flat against the packing and will
not get caught in the retainer threads.
7.
Thread aft retainer into socket until contact is made and resistance is
felt on packing.
8.
Measure and record the distance from the aft end of the retainer to the
aft end of the socket in three places. The average of these values is
distance “A”. Distance “B” is equal to “A” minus 3 mm (1/8 in.).
Arneson Surface Drive Service Manual #1015710