4.5.7 Adjusting the pretension/clearance of
bearings
When the thickness of shims has been determined, the
transmission must be disassembled again.
a) Using a adequate drift punch, drive the parallel pins
(item 1, Fig. 5-7a) with slight blows, out of the hous-
ing.
b) Loosen hex bolts (item 2 and 3, Fig. 5-7a) with lock-
washers (item 4, Fig. 5-7a) and remove input side of
housing (item 5, Fig. 5-7a).
c) Pull outer races of bearings out of the input side of
the housing using the extracting unit (Fig. 5-7b) or
heating the half housing in an oven to approx.
120ëC (248ëF) and remove the outer races of bear-
ings together with shims.
|
WARNING
|
Handle heated housing half and outer race only with
protective gloves!
NOTE
Make sure to keep the shims with each outer race
and not mix them together.
4.5.8 Final assembly of the housing
a) Heat input side of the housing in an oven to approx.
120ëC (248 ëF).
|
WARNING
|
Handle heated housing only with protective gloves!
b) Insert the required shims for proper pretension into
bearings bore under bearing outer race.
c) Insert outer races of bearings. When the housing
has reached ambient temperature, drive outer races
of bearings down to the stop, using a copper punch.
d) Insert shafts.
e) Fill space between seal and dust lips of shaft seal
rings with a high quality bearing grease (Staburags
Kluber NBU 30).
f) Apply a thin coat of Loctite 518 on mating surface of
input side of the housing and join both housing
halves together.
g) Drive parallel pins into housing to align housing
halves, before tightening.
h) Install mounting bolts (item 2 and 3, Fig. 5-7a) and
torque them to 40 Nm (30 ft.lb.).
NOTE
There must be not measurable bearing clearance.
|
WARNING
|
The necessary time for a complete polymerization is
5 hours: we recommend therefore to clean carefully
the mating surfaces with Loctite 7063 cleaner be-
fore applying the Loctite 518 and wait the requested
time before the spin test.
24
Repair Manualand Spare Parts List
Section 4
1
4
2
4
3
1
5
FIG. 5 - 7a
ADAPTER FOR
BASIC UNIT 454422
50
A
B
BASIC UNIT
FIG. 5 - 7b
