SEQUENCE
ANALYSIS
23
01/01/2016
Corrective
Action:
A1.
Clean
fan
hub.
A2.
Tighten
and
align
hub
bolts.
A3.
Reset
blade
pitch
to
proper
setting
and
tighten.
A4.
Replace
fan
or
have
fan
repaired
and
rebalanced.
A5.
Repair
and
check
fan
for
vibration
cause
and
correct.
A6.
Replace
motor
bearing(s)
or
replace
motor.
B1.
Inspect
for
problem,
repair
or
replace.
(1)
Bent
auger
tube
(2)
Fighting
not
wearing
even.
B2.
Replace
bearing(s).
B3.
Replace
shaft(s).
B4.
Replace
hanger(s).
C1.
Level
dryer
properly.
C2.
Support
dryer
per
foundation
print.
FAN
VIBRATION:
CAUSE
AND
PREVENTION
Extreme
damage
can
occur
from
fan
vibration.
The
major
cause
of
vibration
is
related
to
dust
accumulation
and
improper
maintenance
of
the
fan
assembly
and
fan
motor.
During
the
drying
process,
a
considerable
amount
of
dust
is
dispersed
into
the
air.
This
air
is
channeled
across
the
motor
and
fan
into
the
plenum
chamber.
The
dust
can
collect
on
the
motor
and
on
the
inside
of
the
fan
hub
or
the
center
portion
of
the
fan.
The
amount
of
dust
varies
from
the
type
and
quality
of
product
being
dried.
When
a
dryer
is
shut
down,
dust
may
fall
off
the
fan
hub
unevenly.
Upon
restarting,
this
accumulation
of
dust
will
act
as
extra
weight
on
the
fan,
causing
the
fan
to
be
out
of
balance.
Preventive
maintenance
procedures
to
eliminate
vibration
causes
are
as
follows:
inspect
the
fan
hub
for
dirt
,
check
the
fan
blades
for
chips,
cracks
and
proper
setting,
make
sure
all
bolts
on
the
bushing
are
tight
.
Check
the
fan
motor
making
sure
motor
mount
bolts
are
secure
,
motor
bearings
running
cool
and
not
noisy
.
Major
motor
manufacturers
recommend
that
motors
be
rotated
a
minimum
of
five
revolutions
every
thirty
days
to
provide
proper
lubrication
of
bearings
and
prevent
moisture
contamination
in
the
motor
housing.
Inspect
motor
and
fan
assembly
ensuring
free
turning
of
fan
blades
and
to
ensure
proper
clearance
between
blades
and
fan
drum.
Fan
and/or
motor
vibration
over
a
long
period
of
time
will
eventually
cause
problems.
Check
your
dryer!
71
Summary of Contents for DP
Page 1: ...Operation Manual 2016 MODELS MSF DP DPSL DPXSL DPX4T DPX8T DPX12T DPX16GT Grain Dryer ...
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Page 6: ...GENERAL 2 01 01 2016 Dryer Labels Location 4 ...
Page 7: ...GENERAL 3 01 01 2016 5 ...
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Page 24: ...STARTUP 10 01 01 2016 Alarm Limit Indication Error Messages 22 ...
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Page 26: ...STARTUP 12 01 01 2016 24 ...
Page 32: ...STARTUP 18 01 01 2016 GRAIN SHRINKAGE TABLE SHRINKAGE WHEN GRAIN IS DRIED TO THESE LEVELS 30 ...
Page 46: ...STARTUP 32 01 01 2016 Alarm Limit Indication Error Messages 44 ...
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