Chapter 7 Reduction and Reversing Gear
5. Reassembly
4LHA Serit
Preassembly of
Input
Half
of Housing
31.
Install breather valve (do not overtighten).
A
WARNING
Use
care
in
handling
housing once it has
been
heated
with
a
torch
lamp.
Severe
burns could
result.
Use special
protective
gloves
when
handling
housing.
33.
Heat each tapered roller bearing cup bore
with
a torch
lamp.
Insert shims (less those removed) and bearing
cups
into appropriate bearing bores. When housing has
cooled
(Do Not cool
with
water), tap bearing cups
with
a
suitable mandrel to ensure
that
cups are fully seated.
BEARING PRELOAD ADJUSTMENT
IMPORTANT: If new
tapered
roller
bearings
have
been
installed, the
preload
must
be
readjusted.
If
bearing
were
not replaced, proceed to the
final
reassembly section.
NOTE:
The required preload of bearings of the individual
shafts is obtained by using shims beneath the tapered roller
bearing cups in the input half of the housing.
NOTE:
Shims which have been removed during disassembly
may be reused.
32.
Subtract approximately 0.008 in (0.2mm) of shims from
each
bearing cup bore. Remove and set
aside,
but do
not mix up.
a
- Bearing
Cups
b - Torch Lamp
7-2-31
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