TP0003B
BM BULKMETER
Chap 5
Page 10
SERVICING
10.2
10.3
10.4
10.5
10.6
10.7
10.8
If
a
new
rotor
is
being
fitted,
the
clearance
between
the
inner
covers
and
rotor
face
must
be
checked.
If
rotor
is
not
being
renewed
continue
with
paragraph
10.6.
Fit
rotor
into
body
without
compression
spring
(13).
Place
a
straight-edge
across
body
of
meter
and
using
feeler
gauges
measure
the
clearance
between
rotor
face
and
underside
of
straight-edge.
See
Table
1
--
Fits
and
Clearances.
If
the
measured
clearance
is
outside
the
figures
stated
then
the
meter
and
new
rotor
should
be
returned
to
Liquid Controls
for
re-shimming,
re-calibration
and
test.
Place
the
compression
spring
(13)
in
position
in
the
inner
rear
cover
boss,
fit
rotor
(26),
complete
with
bearings
(10)
into
the
body
(1).
Locate
the
inner
front
cover
(5)
into
position
over
the
dowels
(4)
and
secure
to
the
body
with
the
two
screws
(9)
and
a
minimum
of
four
equally
spaced
cover
bolts
(22).
Mark
a
permanent
line
“X”
(See
Fig
5.7)
approximately
6mm
(0.25”)
long
from
near
the
edge
of
the
adjuster.
LINE ‘X’ TO BE SET
EQUIDISTANT BETWEEN
LINES ‘Y’ AND ‘Z’
Y
Z
X
ADJUSTER
BOSS
FIG 5.7 BEARING ADJUSTER CLEARANCE
10.9
Spin the rotor and screw the adjuster inwards until the rotor is heard to touch the inner REAR cover
(6). Mark the boss of the inner front cover in pencil with a line “Y” coinciding with line “X” on the
adjuster.
10.10
Spin the rotor and unscrew the adjuster until the rotor is heard to touch the inner FRONT cover.
Mark the boss, in pencil with a line “Z” coinciding with line “X” on the adjuster.
10.11
Identify the inner front cover, with adjuster fitted, with its particular rotor and body and remove the
cover. With a scriber make the lines “Y” and “Z” on the cover boss permanent. Check that the angle
between the two lines is between 45 deg and 57 deg for BM250 and BM900 meters, 62 deg and 76
deg for BM450 and BM550 meters and 76 deg and 95 deg for BM650 and BM750 meters.
10.12
Reset the bearing adjuster (11) by screwing the adjuster inwards to bring line “X” (Figure 5.7)
equidistant between lines “Z” and “Y”. Lock the adjuster with the counter sunk screw (12).
10.13
Withdraw the rotor from the body.
10.14
Assemble each gland as shown in Fig 5.4 (the chamfered edges of the lower gland washers (29) face
downwards). Ensure that each gland assembly is located in its correct rotor recess.
Содержание Avery-Hardoll BM Series
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