
Subsection 13 (GEARBOX AND 4X4 COUPLING UNIT (WITH EXTERNAL SWITCHES))
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1. Ball bearing inner race
2. Mating surface of left housing
3. Depth gauge
G = Distance between mating surface of center
housing and shim surface.
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1. Mating surface of center gear housing
2. Shim surface
H = Distance between thrust surfaces of bevel
gear shaft.
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A =
2 mm (.0787 in)
nominal thickness of axial
needle bearing.
E = The shim number nominal value as found in
the
BEVEL GEAR BACKLASH PROCEDURE
.
For example, shim number 150 represents a
value of 1.50 mm (.0591 in).
When the measurements are taken, calculate the
theoretical shim thickness (I) using the formula:
(I = F + G - H - A - E).
Take the obtained theoretical shim thickness (I)
and choose the corresponding shim number (J)
according to the following table.
THEORETICAL
SHIM THICKNESS
-I-
SHIM NUMBER
-J-
1.22 mm to 1.31 mm
(.048 in to .0516 in)
120
1.32 mm to 1.41 mm
(.052 in to .0555 in)
130
1.42 mm to 1.51 mm
(.0559 in to .0594 in)
140
1.52 mm to 1.61 mm
(.0598 in to .0634 in)
150
1.62 mm to 1.71 mm
(.0638 in to .0673 in)
160
1.72 mm to 1.81 mm
(.0677 in to .0713 in)
170
1.82 mm to 1.91 mm
(.0717 in to .0752 in)
180
For example, if the theoretical shim thickness (I)
is 1.53 mm (.0602 in), choose the corresponding
shim number 150 (J).
Bevel gear axial clearance of 0.02 mm to 0.11 mm
(.0008 in to .0043 in) is included in the above table.
Assembling the Gearbox
Reverse the disassembly procedure. However,
pay attention to the following details.
Installing the Bearings
Unless otherwise instructed, never use hammer
to install ball bearings or needle bearings. Use
press machine only.
If necessary heat housings up to 100°C (212°F)
before installing ball bearings or needle bearings.
WARNING
Clean oil, outside and inside, from housing
before heating.
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