-
2-
修复流程
2.1
清洗
,
检验和定期检修
General
maintenance instructions
维修简介
设备维修作业应符合本手册所列指示
Equipment maintenance operations shall
be carried out in compliance with the instructions
set
out in this manual.
加强对设备操作的专业知识可以更好防止故障和事故的发生，减少维修成本，
< br>从而提高效率和生产力。
A comprehensive knowledge
of equipment construction and
operation
will provide better prevention against
malfunctions and accidents and a
longer
life of equipment and will reduce maintenance work
and costs, thereby
improving efficiency and productivity.
操作说明本手册仅注重基本方面。在相关领域的设备全部掌握
将被收购的一步
一步的基础上在整个操作和维修业务。
Operations described in this manual
focus only on essential aspects. Full mastery of
equipment
in the relevant domain will
be acquired on a step-by-step basis throughout the
operating and
maintenance operations.
Only the maintenance
operations related to the equipment supplied by
mechanical engineering
constructor are
dealt with in this manual.
General maintenance
conditions
a)
Storage and arrangement of equipment
Mobile equipment (skips, tools …)
shall
be kept stored at locations
provided for this purpose
and shall be
clearly identified.
After
removal/disassembly
of
the
components
the
tools
used by
maintenance
personnel
must
not be stored in
production areas.
b)
Cleanliness
All the products required for operation
and maintenance (banding strip, wood, rags,
papers....) shall not be left behind.
Complete cleaning shall be carried out
at the end of each operation.
Some items of equipment are more likely
to be exposed to dirt accumulation and need
to be cleaned at each maintenance
operation using adequate means (air, water,
detergents, rags, brushes....).
Types of equipment
concerned :
Slide ways
–
guiding rods - runways
Photocells - footlights
Electric auxiliary devices
Belts - chains - cables
Roll
barrel and roll coatings
c)
Safety
system
安全系统
Safety
devices shall be kept in proper place and
perfectly operational.
安全设备将需要在在正确的地方和完善的操作
d)
Ground condition
地面条件
Keep
the
ground
free
from
slippery
elements
(oil,
grease…).
Any
leaks
shall
be
cleaned
off
wit
h absorbent materials
(sawdust ….).
地面远离光滑的东西（如：油
脂）任何泄露将被用吸附材料清除（如：锯木屑）
e)
Pipe condition
Defective
pipes (leaks, vibrations) shall immediately be
repaired.
漏油管需立即修理
Possible causes : faulty flange
assembly, faulty seals, faulty pipe supports,
faulty assembly of
union
joints.
可能导致因素：错误的法兰装配，错误的密封
，错误的油管供应，错误的连
接装配
Do not forget to paint pipes after
repair work.
在修理工作后勿忘装涂油管
f)
Equipment vibrations
设备振动
A first
visual and/or tactile inspection may be carried
out.
开始首次视觉和触觉的检验
Vibrations may originate from
wrong/inadequate fastening of equipment and/or
piping.
振动可能来自错误
/
紧固设备不足和
/
或管道
g)
Electric
wiring on machine
机械电线
Visual
inspection
of
cable
quality
:
cables
should
be
kept
protected,
packing
boxes
in
good
condition, terminal devices and boxes
closed, conductors identified.
目测检查电缆的质量：电缆应尽量保护，包装完好，终端设备和纸盒封闭，导体
确定。
h)
Pumps
–
Important
recommendations
Pumps shall
be installed on a stand-by redundancy basis, ie
the same pump must be used as long
as
it is operating smoothly, while the other pump is
used as a stand-by pump.
泵应安装在一
< br>个独立的冗余基础相同，
即必须使用泵，
只要它运作良好
，
而其他泵作为备用泵。
In
the event of anomalies such as noise or abnormal
behaviour of the pump in operation start-up
the stand-by pump and carry out a
thorough inspection of the defaulting pump. After
inspection,
re-install and restart the
pump, carefully rinse the pump and shut the outlet
pipe off.
在如噪音
或启动运作的发现泵异常行为的
异常活动，由泵，进行了彻底检查问题泵。检查
后，重新安装并重新启动泵，仔细冲洗泵
和关闭的排气管了。
Systematic
alternate
use
of
pumps
is
prohibited
as
the
two
pumps
of
the
same
circuit
would
accumulate
the same operating time and, in case of
malfunction of one of the pumps, there is a
too high likeliness that the second
pump would also break down.
系统地泵交替使用，禁止
作为同一赛道的两个水泵将累积相同的操作时间，在对其中的泵
故障的情况下，
有一个过高
likeliness
，第二水泵也将打破。
Every
month,
when
the
pumps
are
equipped
with
a
rinse
system,
it
is
recommended
that
the
stand-by pump be
switched on and run a few minutes. When using
products likely to crystallize,
rinse
carefully and drain the pump body. Shut the drain
pipe after dripping.
Beware
: !
After
each
operation
on
the
electric
part
of
a
pump,
it
is
absolutely
necessary
to
disconnect
the
pump
motor
and
to
check
the
rotational
direction of the
motor before restarting the pump.
i)
Lubrication
Equipment
lubrication
operations
shall
be
carried
out
according
to
the
specified
periodicity,
using the recommended types of
lubricants.
Grease nipples
must be properly wiped before receiving the grease
pump.
Excess grease must be
wiped. Use clean and not plushy rags.
For
some
equipment
the
pressure
of
grease
pump
should
not
exceed
a
certain
value.
Use
equipment fit for the
task to be carried out.
For some pumps
and fans included in
VAI CLECIM
?s scope of supply, bearings are
lubricated
by oil contained in the
bearing box.
During oil
makeup or filling after emptying, it is essential
that the fittings used for filling, such
as pourers, funnels, manual pumps, be
properly cleaned.
j)
Painting
Carry
out a visual inspection of coats of paint on the
equipment, tank, machines, valves, pipes,
etc
…
If
the
coat
of
paint
shows
such
defects
as flaking
exposing
the priming
coat,
bubbles,
etc
…, eliminate all of the
paint that does not adhere to the base any more,
deoxidize the bare
surfaces,
if
needed,
remove
grease
properly
from
the
cleaned
surface
and,
where
necessary,
repaint according to original painting
specifications.
Caution :
When carrying out paint work on
equipment with mechanical components in the open
air,
e.g. rod of pneumatic cylinders,
abrasion strip or disks should under no
circumstances be
used because of the
risk of projection of abrasive dust on mechanical
parts.
Use metallic
brushes,
either manual or air-actuated.
k)
Components and sub-
assemblies to be systematically replaced
A number of components and sub-
assemblies must be replaced systematically :
Two circumstances should be
considered :
Components to be
systematically replaced after removal
Components to be systematically
replaced in the event of a malfunction
Components to be systematically changed
after removal
The
following
components
shall
systematically
be
replaced
after
being
removed
and
should
never be re-used :
- Nut or screw retainers of
any type (tab washers, split pins, etc..)
- Nylstop nuts and any other threaded
fixing devices with plastic insert.
- O-rings
- V-shaped seals
- Double lip seals
- klingerite, butyl, etc. flat seals
- Axial face seals for pumps
Components to be systematically
replaced in the event of a
malfunction
The
following components shall systematically be
replaced after occurrence of a
malfunction.
-
All hand-
operated butterfly valves in water systems,
regardless of ND
- Low pressure
spherical valves, ND
?
32,
welding or flange type
-
Roller
bearings
having
overheating,
pitting,
fretting
or
flaking
marks,
even
minor.
- Heating batteries for strip drying
units.
This list is non-exhaustive and
should be harmonized with
MAANSHAN
?s current
practices
.
l)
Preventive maintenance of roller
bearings
Roller bearing condition
should be checked at regular intervals to avoid
line stops. There are
two
methods
for
accurately
checking
the
condition
of
roller
bearings
when
the
line
is
in
operation :
temperature measurement and vibration measurement.
Both types of measurements
may
supplement each other.
Concerning
vibrations
the
use
of
a
portable
measuring
device
associated
with
a
velocimeter
sensor
is
recommended.
Of
course,
other
methods
(accelerometer
sensors
associated
with
frequency
filters
and
appropriate
software,
for
instance)
can
be
used
depending
on
MAANSHAN
?s current practices.
Caution :
When changing a
roller bearing it is necessary, after re-assembly
of the bearing, to make a
record
of
the
vibration
marks
on
the
overhauled
bearing.
This
record
will
be
used
for
comparison with the measurements to be
made later on.
Besides, it
is recommended to make a visual check of whether
rotating parts are not vibrating as
a
result
of
faulty
balancing.
This
type
of
vibrations
are
likely
to
entail
early
malfunction
of
cardan shafts and roller
bearings.
m)
General recommendations for removal/re-
installation and disassembly/re-assembly
Before any operation, make
sure that indispensable lock-outs have been
carried out.
The operation
shall be carried out as per assembly/sub-assembly
drawings or, in complex cases,
according
to
an
intervention
sheet
from
the
relevant
maintenance
book.
Re-installation
or
re-assembly shall take place according
to the same documents.
During a removal or disassembly
operation check the components other than the
defaulting one
and replace or repair
the components that have been found defective.
The roller
bearings shall be disassembled, and the
components cleaned in an ultrasonic tank
with a certified solvent. Roller
bearings must be cleaned one after another as the
components
are not basically
interchangeable. After cleaning and re-
installation the roller bearings must be
oiled immediately.
Bearing seals must systematically be
replaced. A removed seal must under no
circumstances be
re-used
After each operation make a test to
check for smooth running, thereby confirming the
successful
operation.
Conditional maintenance
Conditional
or
predictive
maintenance
is
a
process
for
determination
of
a
machine
condition
during operation.
Before breakdown this process is instrumental in
:
- making a
diagnosis
-
providing
relevant
parameters
for
prediction
of
how
they
are
likely
to
develop
- scheduling maintenance operations
- focus only on defective components
- Key parameters to be monitored are :
PARAMETER
Temperature
Speed
Noise
Oil condition
Vibrations and roller bearing condition
For
optimum
availability
of
equipment
checking
operations
must
be
carried
out
periodically
(time intervals
to be defined by
MAANSHAN
)
A)
Instructions for use of
measuring instruments
INSTRUMENT
Digital
thermometer
Optical speedometer
Electronic stethoscope
Oil testing device
Vibration
sensor
Follow the instructions of
suppliers? manuals
.
B)
Safety instructions to be observed
during checking operations
(in the event of the equipment not
being equipped with permanent measuring
instruments).
As such
checking operations are carried out when the
machines are in operation, it is essential
that
the
personnel
in
charge
of
checking
operations
be
skilled,
informed
and
have
got
good
knowledge of the equipment to be
maintained.
The personnel
shall observe and apply all the regulations
related to the safety of personnel and
property.
In some cases,
especially when due to the surroundings the
personnel is not able to work safely
enough and/or to have access to the
components to be inspected (difficult access due
to machine
complexity,
movements
of
machine
components,
in
areas
limited
by
safety
doors,
etc
…),
stationary measuring/checking
instruments have to be installed temporarily.
Installation thereof
shall
take place when the machines are OFF and locked
out.
Periodic inspection and maintenance
01
02
03
04
05
06
07
08
09
10
11
12
13
14
-
Civil engineering
-
Anchor bolts
-
Screw joints
-
Slide ways
–
guide rods - runways
-
Moving parts
-
Cell - footlights
-
Electric auxiliary devices
-
Belts - chains - cables
-
Apparatus for pressurized fluids,
hydraulic and pneumatic cylinders
-
Roll barrel and roll coatings
-
Rollers, roller bearings,
bronze bush
-
Gears, pinions
and racks, machine and gear reducer casings
-
Brakes, clutches
-
Grease lubrication
circuits
2.1.1
Abbreviations and terms used :
LINE STATUS
SS
BB
*
For standard bought-
out
components such as cylinders, gear reducers,
couplings, etc .. refer to suppliers?
manuals.
OFF
ON
H
S
D
W
M
3M
6M
A
2A
B1
FREQUENCY
Once an hour
Once every 8 hours
Once a
day (24 hours)
Once a week
Once a month
Every 3 months
Every 6 months
Once a year
Every 2 years
See
s
upplier?s
instructions *
2.2
General Maintenance
Manual
一般维修手册
01 CIVIL ENGINEERING
组件进行检查或保养
检测类型
视觉检查：基础模块和地面
不
应因任何恶化（油，解决方案）
积极代理商。提供必要的防护
装置。
Visual
inspection :
check that
there
are
no
concrete
splinters.
This
may
2
–
FOUNDATION
BLOCKS
be a sign of
insufficient tightening or
inadequate
anchoring
and
requires
immediate
repair
to
prevent
more
serious deterioration
to concrete and
to equipment itself.
Visual
inspection
:
this
is
a
serious
case which should not occur. Check
3 - CRACKS
for
bolt
tightening
and
foundation
block
dimensioning.
Repair
immediately
to
prevent
more
serious deterioration.
设备条件
频率
1
–
表面
BB
A
BB
A
SS
A
02 ANCHOR BOLTS
COMPONENT TO
BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
Check
tightening
of
main
bolts
by
location
of
screw-nut
positions
and
1
–
BOLTS
by tentative tightening.
Tighten
to
the
torques
indicated
on
drawings
SS
A
3 SCREWED JOINTS
COMPONENT
TO BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
1
–
GENERAL
Visual
inspection
and
by
tentative
SS
M
3 SCREWED JOINTS
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF
INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
APPLICATION
2
–
SPECIAL
tightening of screws and bolts, check
for nut retention devices.
APPLICATION
(Machines
subjected to
shocks,
high
speed).
3 -
GENERAL
vibrations,
inertia,
high
Mandatory for movable
components
or
associated
components
(e.g.
uncoiled
mandrel,
edge
trimmer
slide
ways).
By
sampling
for
other
joints.
Warning:
Screws
and
bolts
must
not
be
checked
selectively.
All
screws
and bolts must be
checked.
BB
W
Screws and
bolts tightening torque
Diameter
3
4
5
6
8
10
12
14
16
18
20
22
24
Pitch
0.5
0.7
0.8
1
1.25
1.5
1.75
2
2
2.5
2.5
2.5
3
Class 6.8
Tightening
torque (Nm)
0.6
1.5
2.9
5.0
12
26
40
63
94
134
194
266
334
Class 8.8
Tightening
torque (Nm)
0.8
2
3.9
6.7
16
31
54
85
127
181
259
354
445
Class
10.9
Tightening
torque (Nm)
1.2
2.8
5.4
9.3
22
43
74
118
176
251
364
498
594
Class 12.9
Tightening
torque (Nm)
1.4
3 .3
6.5
11
27
52
90
143
213
303
437
598
719
27
30
33
36
39
42
48
3
3.5
3.5
4
4
4.5
5
492
640
865
1114
1440
1785
2687
627
850
1150
1485
1920
2380
3583
881
1196
1620
2090
2700
3346
5040
1057
1430
1946
2507
3240
4015
6047
The
tightening
torques
given
in
the
table
above
were
calculated
under the
following conditions:
?
friction coefficient: 0.12 (tightening
with loctite or lubricant),
?
tightening
coefficient: 0.65. Re,
?
Precision:
?
5%
if < 600, otherwise
?
10%+B19.
Note :
Such rules shall be
applicable to all mechanical equipment, unless
otherwise specified on drawing and/or in
the relevant chapter.
The rules shall also be applicable when
fastening any items of equipment on a steel
structure, frame, metallic
support.
Required precision for
tightening torques : class C as per table below.
For precision classes :
Tightening torque variation in
industrial environment
Precision class
of tightening torque
D
?
20 %
à
?
50 %
Portable, hand-operated
Equipment
Portable, motor driven
Simple impact wrenches
Positive clutch screw driving
machines
Stationary, motor
driven
?
50 Nm
?
50 Nm
Use
A
Precision better than
?
B
Precision better than
?
C
Precision better than
?
D
Precision better than
?
5
%
10
%
20
%
50
%
)
) see table
) below
)
C
?
10 % à
?
20 %
Simple pneumatic screw
driving
machines
?
10 Nm
Simple electric
screw driving
machines
?
10 Nm
Impact wrenches with stored
energy (torque rod or other
process)
Bevel gear type wrenches
?
10 Nm
?
20 Nm
Simple
torque setting
wrenches (see E74-325)
B
?
5 % à
?
10 %
A
?
?
5 %
Electronic torque wrenches
Torque setting wrenches
with
automatic reset
Torque wrenches with
dial
type direct reading
?
400 Nm
Hydraulic screw driving machines
?
800 Nm
?
2000 Nm
Bevel
gear type setting wrenches
Compressed air motors with torque
control
?
80 Nm
no
limitation
Pulse motors
Electric screw driving machines
Two-speed motors
Electronic servo-motors
no
limitation
no limitation
?
400 Nm
no
limitation
no limitation
04 SLIDEWAYS,
GUIDE RODS, RUNWAYS
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
Visual
inspection
:
slide
ways
or
1
–
GREASING
guide
rods
should
be
coated
with
a
thin film
of grease.
2
–
SURFACE
Visual
inspection
:
marks,
seizing.
Check
greasing,
scrape
surfaces,
if
necessary.
Checking
by
means
of
shims
and
visual inspection.
Keep
the
clearances
specified
on
drawings.
Backlashes
may
cause
deterioration.
3
–
CLEARANCES,
BACKLASHES
Referred
to
the
SS
6M
tolerance
specified
on
workshop
drawings,
it
is
acknowledged
that,
beyond
maxi.
10
%
to
15
%
backlash,
the
wearing
parts
have
to
be
replaced,
after
checking
that
adjusting
possibilities
cannot
ensure
functional clearances any more.
Visual
inspection
of
the
bearing
4
–
CONDITION OF
ROLLERS,
WHEELS
surface
of
wheels
on
rails,
quality
and
wear
of
guiding
elements.
Wheels
to
be
changed
if
guiding
becomes dangerous.
5
–
WEARING
OF
RAILS,
FASTENING
RAIL
Visual
inspection
:
to be
changed
if
there is a risk of wrong
guiding or if
wear
causes
detrimental
lack
of
precision.
BB
6M
BB
6M
BB
M
BB
M
ASPECT
05 MOVING PARTS
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF
INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
1
-
–
THIS
IS
or
APPLICABLE TO :
Machines
machine
components
travelling
on
rollers,
wheels or slide ways.
-
Tilting
machine
components.
-
Cable
drag
chains
and hose carriers
Visual
inspection
of
cleanliness
of
runways and slide ways.
Visual
inspection
of
space
available
for movements.
Visual inspection of the clearance of
hoses and cables.
No
detrimental
friction
against
components.
No
twisting of hoses.
BB
W
06 PHOTOCELLS, FOOTLIGHTS
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF
INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
Systematic cleaning.
1
–
CLEANLINESS
2
–
FASTENING OF
DEVICES
CABLES
As
components are used for automatic operation, it is
essential that they are in
3 - REMARK
good
condition
to
ensure
equipment
productivity
and
safety
as
well
as
personnel safety.
AND
Visual
inspection
BB
M
Preventive
change
of
bulbs
(see
constructor?s manual)
SS
M
07
ELECTRIC AUXILIARY DEVICES
COMPONENT TO
BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
As
those
components
are
used
for
interlocking
functions,
it
is
very
important to check that they are in
proper condition for safety reasons,
1
–
PROXIMITY
–
PULSE
both
concerning
equipment
and
personnel (in addition to equipment
productivity reasons).
Visual
inspection
of
proximity
switches
and
associated
cams.
Check
for
rigidity
of
fastening
device by hand.
Refer to equipment 6 for
cables.
Check that connections are in
good
2
–
JUNCTION
condition
(tightening,
cleanliness)
and whether cables are
visible and
properly
identified.
08 BELTS, CHAINS, ROPES
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF
INSPECTION
EQUIPMENT
CONDITION
SWITCH
BB
M
GENERATOR
BOXES
BB
A
FREQUENCY
1
–
TENSION,
OSCILLATION
2
–
NOISE
Visual
inspection
Noise level measurement
SS
BB
A
W
08 BELTS,
CHAINS, ROPES
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
3
–
PULLEY
ALIGNMENT
4
–
CHAIN ,
BELT
AND
ROPE WEAR
5
–
GREASING
OF
CHAINS
Visual
inspection
Visual
inspection
–
see
supplier?s
documentation
for
chains,
belts
and
cables)
Visual inspection
SS
A
SS
M
BB
2W
09 APPARATUS FOR
PRESSURIZED FLUIDS, HYDRAULIC AND PNEUMATIC
CYLINDERS
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
1
–
FASTENING
MEANS,
VIBRATION
2
–
SEALING
3
–
SETUP
4
–
SEALING
(for
hydraulic cylinder)
5
–
DAMPER
Visual
inspection
of
fastening,
mounting
of
device
and
connecting
pipes.
Visual/sound inspection
Check
that
the
values
set
up
during
commissioning are kept unchanged.
Visual
inspection,
leaks
or
seeping
in
the region of holes (flanges or unions)
and of cylinder rod
Visual
inspection.
After
adjustment,
lock the
adjusting screws properly.
Visual
inspection.
Impact
marks,
jamming....
likely
to
damage
seals
and cause leakage.
Visual
inspection
of
anchor
bolt
stiffness
on
the
ground
and
on
machines
in
case
of
shocks.
Check
clearances
at
swivel
joints,
bearing
necks.
Visual
inspection
:
check
that
SS
M
SS
M
BB
6M
BB
6M
BB
BB
6M
6M
BB
6M
OPERATION
6
–
CYLINDER
ROD CONDITION
7
–
CYLINDER
ANCHOR BOLTS
8
–
MOVEMENTS
OF
RODS
9
–
ABSENCE
OF
OR
DIFFICULT
CYLINDER
MOVEMENT
10
–
PNEUMATIC
PANELS
REMARK
CYLINDER
cylinder
rods
are
not
subjected
to
abnormal stresses (wrong alignment)
and that opening and closing time is
correct.
BB
M
Check for piston seal condition.
BB
M
Actuate
drain valve.
Check oil level in oiling
pot.
Replace the filter element.
All
inspections
shall
be
carried
out
on
the
machines
in
operation,
on
the
circuits under pressure while observing
the safety regulations.
BB
W
10
ROLL BARREL AND ROLL
COATING
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
Visual inspection.
Check for
cracks, fractures.
Depending
on
applications,
they
1
–
SURFACE
may be permissible
or be detrimental
to product quality.
Some
incipient
cracks
can
be
repaired to avoid crack growth.
For coatings having an
influence on
the quality of products.
For
roll
barrel
coating :
check
screws and bolts.
BB
BB
2M
2M
CONDITION
BB
11 ROLLERS,
ROLLER BEARINGS, BRONZE BUSH BEARING
COMPONENT TO BE
CHECKED OR
MAINTAINED
TYPE OF
INSPECTION
EQUIPMENT
CONDITION
FREQUENCY
ROLLER BEARINGS
1
–
GENERAL
检查噪音，振动，过热，密封
性
A
more
or
less
important
factor
depending on the
application.
Visual
inspection
1)
For
rollers
having
an
influence
on the quality of
products.
2)
For
rollers
having
no
influence
on the quality of
products
Check that the roller
rotational speed
is
consistent
with
strip
speed
set
point and actual roller diameter.
ROLLER BEARINGS
Checking
by
hand
or
using
a
contact
pyrometer.
Normally, permissible
temperature up to
60 °
C.
However,
in
case
of
overheating,
check
the
detailed
technical
data
of
roller
supplier.
Possible overheating causes :
Excess grease or lack of grease.
Excess oil or lack of oil, inadequate
data
(viscosity, temperature).
Roller bearing overload
Wrong adjustment of side clearances
Wrong fit tolerance for bores and
shafts
Sound check. Cyclic noise may be
the
sign of ball or roller defects.
Constant
noise,
even
heavy
noise,
is
not a sign of defects.
Visual
inspection.
Check
for
proper
tightening of joint faces.
BB
M
2
–
SURFACE
CONDITION
BB
W
3
–
MOTORIZED
ROLLERS
BB
2M
BB
A
1
–
OVERHEATING
BB
M
2
–
NOISE
BB
M
3 -
TIGHTNESS
Check
for
quality
of
joint
faces,
if
necessary,
use
sealing
products
(Loctite or equivalent)
BB
M
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