3.
Before removing the fixed sheave move
the
sheave from side to side to check
for
a
worn
bushing. If there
is
excessive
movement
re-
place
the
bushing.
For
an accurate check mea-
sure the diameter of the shaft of the movable
sheave and t
he
inside diameter of the bushing
with
micrometers. If the difference
between
the
two
readings is 0.
02
in. (0.5 mm) or more
replace the bushing. (See Figures
3-113
and 3-
114.)
Figure
3-113
Figure
3-114
4.
Measure
t
he
inside diameter of the
lower
bushing
in the movable sheave and the dia-
meter
of
the jacks haft if the difference be-
tween
the
readings is
0.02
in. (0.5 mm)
or
greater, replace the bushing. (See Figures 3-
115
and
3-116.)
3-
76
DRIVEN
CONVERTER
Figure 3-
115
Figure
3-116
5. Place the shaft end of the coupling into the
end of the shaft on the
movable sheave and
move from side to side if
there
is excessive
movement
replace the
bushing.
For an ac-
curate
check, measure
the
outside diameter of
the
coupling shaft and the inside diameter of
the bushing
with
micrometers
. If the
dif
-
ference between the
two
readings is
0.02
in.
(0.5 mm) replace the bushing. (See Figures 3-
117 and 3-118.)
6.
Check the
wear
shoes
if
they
are excessively
worn
replace them. Push the
wear
shoes
out
from the back of the fixed sheave
with
a ham-
mer and punch.
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