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137
MANUALGEARBOX DEFENDER
INPUT
-
MAINSHAFT BEARING ADJUSTMENT
1.
Turn gearbox over with input shaft uppermost.
Remove layshaft support plate.
NOTE: Correct shimming of the
input
shaft bearing is vital to ensure that the
mainshaft assembly has the design
0
intended end float, and the bearings are not
pre
-
loaded.
2.
Measure the thickness of a new front cover
gasket.
3.
Place the original shim
on
mainshaft bearing
and finger tighten the bolts.
4.
Measure the clearance between front cover and
gearcase with two feeler gauges.
ST3269M'
'
5.
If required, change the selective washer
to
provide a clearance of 0,35mm to 0,085"
(0.001
to
O.OO3ins)
less than the gasket
thickness.
NOTE: This will ensure
that
when the
gasket and cover is fitted to the correct
torque, the input and mainshaft bearings
will have no pre
-
load and.not more than 0,06mm
(0.0025in) end float.
6.
Remove front cover and keep gasket and
selective washer together.
rj
I,
Mainshaft selective washers
Part number
Thickness(")
FRC
4327
FRC
4329
FRC
4331
FRC
4333
FRC
4335
FRC
4337
FRC
4339
FRC
4341
FRC
4343
FRC
4345
FRC
4347
FRC
4349
FRC
4351
FRC
4353
FRC
4355
FRC
4357
FRC
4359
FRC
4361
FRC
4363
FRC
4365
FRC
4367
FRC
4369
131
137
!,63
1,69
1,75
1,81
1,87
1,93
1,99
2,05
2,ll
2,17
2,23
2,29
2.35
2,41
2,47
2,53
2,59
2,65
2,67
2,77
LAYSHAFT BEARING ADJUSTMENT
1.
2.
Place original selective washer
on
layshaft
bearing, fit front cover without gasket, and
finger tighten bolts.
Measure clearance, with two feeler gauges,
between cover and gearcase. Select
a
shim
that will provide a clearance equal to the
thickness of the gasket that was selected and
measured when calculating the adjustment of
the input and mainshaft bearing.
..
ST2503M
11
32
I
OVERHAUL