Specifications

Open
the
water
section.
Clean
the
water
filter
(O)
or
replace,
if
necessary'
Check
diaphragm
tpj
anO
water
governor
(61),
replace,
if
necessary.
Reassemble
in
reverse
order
using
new
washers.
Where
stuffing
gland needs
replacing
fit
new
too
to
water
section,
incorporating
new stuffing
box.
8.6
Maintenance
of differential
valve
Mark and
disconnect
the two
unions
and
unscrew
the
three
retaining
screws
(Q).
Ooen
differential
valve
and
clean.
Check
dihohraom
and
replace,
if
necessary.
Check
eaiv
ruininq
pin
of
diaphragm
disc
in stuffing
box.
In
casebi
replacement
of
the
stuffing
box'
it is
recommendable
to
replace
also
diaphragm
disc.
Lubricate
pin
with
suitable
grease.
Mark
and
disconnect
the
two
control
lines and
clean
by blowing
through.
Reassemble
in reverse
order.
Jt-
.
Fig.58
32