CHAPTER7
boiler
is
in
operation.
If
absolutely necessary
to
add
oil during operation, remove the air cleaner
and
slowly
add
clean oil into
this
opening.
CAUTION!
Oil
must
NEVER be added
un-
less
the
pump
Is In operation
and
the
strainer
screen In place
in
order
to
avoid damage
to
the
equipment.
The oil and its container should
be
clean. Al-
though there
is
a strainer
in
the lube oil line, its
purpose
is
to
remove any unwanted materials
rather than
to
act
as
a filter for unclean oil.
Air Cleaner
Never operate the air pump without the air
cleaner
in
place. The cleaner itself must
be
peri-
odically checked and its element flushed
and
cleaned. The correct level
of
oil must
be
main-
tained
in
the cleaner.
Ab·-Oil
Tank
The air-oil
tank
contains steel wool used
as
a
filtering medium
to
separate
the
lube oil
from
the
compressed air. A typical tank
is
show
in
figure
1-5. The wool
is
packed into
two
compartments
each containing approximately five ounces. The
wool should
be
replaced periodically whenever
inspection reveals the need. Careful packing
is
necessary
to
assure even density. Do not over
compress the wool and
be
sure
it
is
fluffed out
to
fill
all
available space. Improper packing can
cause high oil consumption. Use wool
of
proper
density-
refer
to
the parts list
in
Chapter
8.
Should sludge accumulate
in
the tank, drain
it
and
flush with a suitable
solvent..
Lube Oil Cooling Coil
The
fms
on
the
tubing must
be
kept clean and free
of any dust or dirt that would impede air flow
and
cause overheating. Use
an
air hose to blow away
debris
..
Internal cleaning
of
the
tubes
is
seldom
required if a good quality lube oil
is
used.
CHAPTER 7-16
INSPECTION AND MAINTENANCE
Lube
OU
Strainer
The lube oil strainer screen must
be
removed and
cleaned at regular intervals.
It
is
advisable
to
remove this screen each month and clean
thoroughly by
immersing
in
solvent
and
blowing
dry with compressed air. To remove, loosen the
cover cap screw, being careful not
to
lose the
copper gasket. Tap the strainer cover gently
to
loosen. Check the cover gasket. Slip the pliers
into the
cross on the
top
of
the strainer
and
twist
counterclockwise
to
remove
the
gasket. Re-as-
semble the strainer
in reverse order.
General
Keep the motor and other components free from
dust and dirt to prevent overheating and damage.
P.
REFRACTORY
The Cleaver-Brooks boiler
is
shipped with com
..
pletely installed refractory. This consists
of
the
rear head (Figure 7-6), the inner door
and
the
furnace liner (Figure 7-7). Normal maintenance
requires little time
and
expense
and
prolongs the
operating life
of
the refractory. Preventive main-
tenance through periodic inspection will keep the
operator informed
of
the condition
of
the refrac·
tory
and
will guard against unexpected
and
un-
wanted down time
and
major repairs.
Frequent
wash-coating
of
refractory surfaces
is
recommended. High temperature bonding air-
dry type mortar, dilluted with water
to
the con-
sistency
of
light cream,
is
used
for this purpose.
Re-coating intervals will vary with operating
loads
and
are best determined
by
the operator
when
the
heads are opened for inspection.
Furnace Liner
Maintenance consists
of
an occasional wash
coating
of
the entire liner. Face all joints or
cracks
by
applying high temperature bonding
mortar with a trowel or fingertips. This should
be
done
as
soon
as
cracks are detected.
75()..150
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