Bonica BC988 User manual

Wheel Balancer
Operation Manual
Model:
• BC988
BONIC

BONIC WHEEL BALANCER
OPERATION MANUAL
INDEX PAGE
ATTENTION ----------------------------------------------------------------------------------------------------------------------------1
1. GENERAL --------------------------------------------------------------------------------------------------------------------------------- 3
1.1 WARNINGS AND CAUTIONS
1.2 TECHNICAL DATA
2. INTRODUCTION ---------------------------------------------------------------------------------------------------------------------- 3
3. INSTRUCTIONS FOR USE ---------------------------------------------------------------------------------------------------------- 4
3.1 LIFTING AND INSTALLATION
3.2 POWER SUPPLY
3.3 FIXING THE ADAPTATOR
3.4 MOUNTING THE WHEEL
3.5 USING THE KEYBOARD
3.6 CALIBRATING THE PANEL
3
.
8
W
H
EE
L
B
A
L
A
N
C
I
N
G
3
.
9
S
E
L
F
-
C
A
L
I
B
R
A
T
I
O
N
F
A
C
I
L
I
T
Y
3
.
10
S
T
A
T
I
C
-
A
L
U
F
U
N
C
T
I
O
N
S
3
.
1
1
O
P
T
I
M
I
Z
I
N
G
T
H
E
U
N
B
A
L
A
N
C
E
3
.
1
2
I
N
C
O
N
S
T
A
N
T
U
N
B
A
L
A
N
C
E
R
E
A
D
I
N
G
S
4
.
O
R
D
I
N
A
R
Y
M
A
I
N
T
E
N
A
N
C
E
-----------------------------------------
-----------------
---------
---------------
---------------
----
8
4
.
1
A
D
J
U
S
T
I
N
G
T
H
E
B
E
L
T
P
U
L
L
E
Y
4
.
2
C
O
M
P
U
T
ER
B
O
A
R
D
R
E
P
L
A
C
E
M
E
N
T
5
.
T
R
O
U
B
L
E
S
H
O
O
T
I
N
G
-------------
---------
--------------------
-----------------------------------------
-------
-------------
----
-
9
6
.
L
O
G
I
C
T
R
O
U
B
L
E
S
H
O
O
T
I
N
G
S
E
Q
U
E
N
C
E
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
0
6
.
1
C
H
E
C
K
I
N
G
A
N
D
S
E
T
T
I
N
G
O
F
S
T
A
T
I
C
V
A
L
U
E
（
S
T
I
）
6
.
2
C
H
E
C
K
I
N
G
A
N
D
U
N
B
A
L
A
N
C
I
N
G
P
O
S
I
T
I
O
N
6
.
3
C
H
E
C
K
I
N
G
A
N
D
C
A
L
I
B
R
A
T
I
O
N
O
F
F
I
X
E
D
D
I
S
T
A
N
C
E
V
A
L
U
E
（
D
F
）
7
.
P
O
W
ER
S
U
PP
L
Y
L
A
Y
O
U
T
D
I
A
G
R
A
M
---
----------------------------------
----
------------------------------
-----------
--
----
---
1
3
3.7 NOTE FOR BALANCING OF MOTORCYLE WHEELS DYNAMICALLY

–1–
ATTENTION
This manual is an integral part of the product.
The warnings and instructions in this manual provide important information about SAFETY IN USE and MAINTENANCE and
should be read very carefully.
KEEP THIS MANUAL IN A SAFE PLACE SO THAT IT IS ON HAND FOR REFERENCE.
Product destination
The wheel balancer is designed exclusively for balancing the tires of wheels with maximum dimensions defined in thegeneral
section of this manual.
During ordinary maintenance of the apparatus, it is the responsibility of the maintenance operator (who should be suitably
trained and professionally qualified) to turn the main switch to OFF, ensuring that it cannot be accidentally switched on,
unplugging the connection to the power supply if necessary.
This machine should only be used for the purpose for which it was designed. Any other use is to be considered improper and
unreasonable.
The manufacturer may not be considered responsible for any damage caused by improper, incorrect and
unreasonable use.
Training and information for the machine operators
The machine should only be used by specially trained and authorized personnel.
The training and informing of the operating staff should be done so as to enable them to operate the machine as described in
the instructions provided by the manufacturer, so that the machine performs in the best possible way and the operations are
carried out efficiently and safely.
For any doubts relating to the use, installation and maintenance of the machine, please refer to the instructions manual or if
necessary contact the authorized service centres or the technical services office of Balance.
Transport and unpacking
For transport of the packaged product, refer to Fig.1.
Once the product has been unpacked, check that the instructions
manual is there, that the material is complete and there are no parts
which have been visibly damaged.
Remove the contents of the packages and place them in a storage
area inaccessible to children or animals.
Environmental requirements for installation
The site of installation should have the following features:
Level horizontal floor, rigid, preferably concrete or tiled. Fig. 1
Sufficient lighting (but without dazzling or very bright lights).
Protected from atmospheric conditions.
Pollution-free area.
Noise level lower than provided for by current regulations.

-2-
The work place must not be exposed to dangerous movements from other machines in

operation.
Explosive, corrosive and/or toxic materials should not be stored in the same

place.
From the control position the operator must be able to see the entire apparatus and the surrounding area. Within the area
you must prevent access to unauthorized persons and objects that may constitute a source of danger.
All the installation operations involving connections with outside main supplies (especially electricity) must be done by
professionally qualified people.
Installation must be done by authorized personnel following the special instructions contained in the manual where necessary.
Safety
Any tampering or alteration of the apparatus which is not previously authorized by the manufacturer will release the latter from
any liability for damages deriving from or referring to the above-mentioned actions.
Removal or tampering with the safety devices constitutes violation of the correlated safety regulations.
The operator must also observe the following safety

procedures:
Check that dangerous conditions do not arise during the operation manoeuvres. Stop the machine immediately in case of
irregular functioning and contact the customer service office of the authorized

retailer.
Check that the working area around the machine is free of potentially dangerous objects and that there is no oil (or other
sticky materials) on the flooring since this is a potential danger for the

operator.
The operator must wear suitable work clothing, protective goggles, gloves and mask to prevent harm from dust or
impurities being blown out. Dangling objects such as bracelets should not be worn, long hair should be protected in a
suitable manner, shoes should be suitable for the type of operation to be performed.
Technical service, repairs and replacement of parts
All repair and extraordinary maintenance operations should be carried out by authorized and professionally qualified personnel. Disconnect
the machine from the mains supplies (electricity, compressed air, etc.) before any maintenance operation.Use original spare
parts supplied by the manufacturer.
Storing
Should the machine have to placed in storage for a long period, disconnect the main supplies, empty the tanks containing the
operating liquids and make sure that those parts which could be damaged by the deposit of dust are adequately protected.
Grease those parts which could be damaged due to drying out and, when the machine is used again, replace the gaskets
indicated in the spare parts section.
Scrapping
If the machine is not to be used again, it should be made inoperative.
Those parts which could cause danger should be rendered harmless.
Consult disposal classification lists for the disposal category of the product.
Scrap as iron scrap and send to the appropriate refuse collection centres.
If it is considered special waste, dismantle and divide into similar parts before disposing in accordance with the regulations in
force.

1. GENERAL PRECAUTIONS
Before operating the balancing machine, read carefully the use and maintenance manual. The noncompliance with these
standards frees the constructor from any responsibility.
1.1. Warnings and cautions
- The machine is to be operated only by authorized personnel.
- Check that the use of the balancing machine does not trigger off hazardous situations to people or things.
- When irregularities or malfunctions occur, stop immediately and require the intervention of the specialized technical
assistance.
- Any maintenance operation is to be carried out by specialized personnel.
- It is absolutely forbidden to alter equipment and safety devices.
- Any utilization of spare parts whose features do not correspond to the following specifications, any modifications or even
any little alterations, free the constructor from any responsibility related to proper use and safety for people and/or things.
1.2. Technical data
–
3
–
Product Weight
165.35lbs(75kg)
2.
INTRODUCTION
The wheel balancer
with
a
microprocessor, capable
of balancing
wheels
weighing
up
to 45
Kg. The
control
elements and
signals
are all contained on the front
panel. The
keyboard
calibration
system
also
provides
a sufficient
adjustment range
to
cope
with
unusual wheels
(acing motorcycles and cars).
Some ALU functions are available for
specially
shaped
wheels
or
for presetting
optional
balancing
machine functions.
NOTE : Accessories for motorcycles need to be equipped by the customer himself.
Motor 110V, 60Hz, 1Ph, 0.34HP( 0.25kW )
Cycle Time 6 to 9 seconds
Data Entry Keypad
Balancing Modes Dynamic/Static/Alloy
Rim Diameter Capacity 11 31/32 - 24 1/64 in ( 304 - 610 mm )
Rim Width Capacity 53 3/64 - 10 15/64 in ( 140 - 260 mm)
Max. Wheel Diameter 40 15/16 in ( 1040 mm )
Max. Wheel Weight 99.2 lbs ( 45 kg )
Shaft Size 36 mm
Max. Shaft Weight 48.5 - 50.7 lbs ( 22 - 23 kg )
Balancing Speed 250 RPM
Accuracy 0.035 ounces ( 1 gram )
Display Standard Or Metric
Self Calibration Yes
Power Cord Length 96 1/16 in ( 2440 mm )
Noise Level <70 dB
Product Dimensions L 40.55 x W 24.4 x H 38.19 in ( 1030 x 620 x 970 mm )

-4-
1. Inner side UNBALANCE POSITION display
2. Outer side UNBALAN-CE POSITION display
3. Outer side UNBALANCE VALUE digital display
4. Displays showing the type of correction chosen
5. Inner side UNBALANCE VALUE digital display
6. DISTANCE calibration key
7. WIDTH calibration key
8. DIAMETER calibration key
9. Key for selecting g/oz and mm/inches; self-calibrating
10. Emergency key
11. Key to start cycle
12. Opt program
3INSTRCUTIONS FOR USE
3.1 Lifting and Installation
Lever the base to lift the balancing machine. In no circumstances should and force be applied to other parts, such as
the
mandrel,
the
headstock,
the
casing
or the accessories
tray.
3.2 Power supply
Before connecting the machine to the mains with the cable provided, check that the voltage is the same as shown on the plate
mounted on the back of the balancing machine.
Standard voltage is 110 V mono-phase.
F
i
g
.
2

–5–
13. Threshold key
14. Key for selecting type of correction
15. Recalculation key
N.B. : Only use the fingers to press the push buttons. Never use the pincers for the counterweights or other
pointed objects.
3.3 Fixing the adapter
Before fixing the adapter on the balancing machine shaft, check that the shaft and the adapter centering area are clean.
Use one of the many adapters produced as per catalogue.
Remember that imperfect centering provokes unbalances on use the wrench provided to block the adapter onto the balancing
machine shaft.
3.4 Mounting the wheel
Mounting the wheel with suitable cone and adjustable nut Remember that imperfect centering provokes unbalances
unnecessarily.
3.5 Using the keyboard
The following operations can be carried out using the keyboard:
Varying the distance (dimension “A”)---------------------------------------------------------------
Varying the width (dimension “L”)-------------------------------------------------------------------
Varying the diameter (dimension: “D”)-------------------------------------------------------------
Recalculating the values------------------------------------------------------------------------------
Disp. The values below the threshold-------------------------------------------------------------
Static Dynamic------------------------------------------------------------------------------------------
ALUx Dynamic------------------------------------------------------------------------------------------
Balancer self-calibrating------------------------------------------------------------------------------
Start by closing the guard-----------------------------------------------------------------------------
Unbalance measured in gm or oz------------------------------------------------------------------
Width measured in mm or inches-------------------------------------------------------------------
Diameter measured in mm or inches--------------------------------------------------------------
Start measuring cycle----------------------------------------------------------------------------------
Emergency cycle stop----------------------------------------------------------------------------------
The unit of measurement chosen for the unbalance (grams or
ounces) or by pressing the START key are stored in the
machine’s memory when it is switched off.
If the unit of measurement selected for the width and diameter
(mm or inches) is inches, this selection must be repeated
every time the machine is started up.
3.6 Calibrating the panel
DIAMETER: input the diameter “d “ which is shown on
thetire.
WIDTH: input the width "b", which is normally shown on the
wheel rim, or measure the width “b” with the calipers
↑a
or
↓a
↑b
or
↓b
↑d
or
↓d
C
FINE
F
ALU
F + C
F + STOP
F +
↑a
+
↓a
F +
↑b
or F +
↓b
F +
↑d
or F +
↓d
START
STOP
F
i
g
.
3

provided.
DISTANCE: find out the measure between the machine and the weights application point on the wheel rim and set by means of
“a”
–
6
–
.
3.7 Note for balancing of motorcycle
wheels dynamically
- Slip the extension onto the distance
measurer.
- Extract the measurer until the
extension touches the inner side of
the wheel rim.
-Read the value “ a ” on the scale,
set it manually using the key 9,
value “a+5” (scale base 25 cm).
+5 cm
3.8 Wheel balancing
Fig.
4
- Close the guard.
- Press the START key.
- The wheel is accelerated automatically to balancing speed and then braked; displays 3 and 5 read the unbalance values.
- Displays 1 and 2 read the correction position with LEDs. If all the LEDs are lit, the correction weight must be put at the top
of the vertical axis.
IMPORTANT: An unbalance value reading below 10-12 grams (0.4-0.5 oz) is normally sufficient for good balancing.
With this balancing machine, it is easy to balance to a tolerance of only 5 grams (0.2 oz) or less.
THRESHOLD KEY: FINE
The correction of residual unbalance below 5 grams (0.2 oz) can be read whenever necessary (wheels for special uses) by
pressing this key with the machine at a standstill.
Display 3 and 5 for unbalances below 5 grams (0.2 oz) in normal conditions.
3.9 Self calibration methods
- Fit any wheel to the shaft, even one that is not balanced, although it is advisable to use one with “average” dimensions.
- Set the exact dimensions of the wheel fitted.
ATTENTION: any error in setting the dimensions will mean that the machine is not correctly calibrated, so all the subsequent
measurements will be faulty until the machine is next calibrated with correct measurements.
- Press F + C .
-6-
- Until the positioning LED’s change from flashing into steady.
- Press START
–
6
–

–
7
–
- Add a 100 gram weight on the outside in any angular position.
- Press START .
- The machine is calibrated at the end of the cycle. The display reads “END CAL”.
Remove the 100 gram weight from the wheel, which can now be balanced with a further cycle.
The values that the machine records form this self-calibration operation are automatically stored in a special memory which also
maintains them when the machine is switched off, with storage lasting for about 10 years, so the machine will be ready for
correct functioning every time it is switched on.
However, the self-calibration operation can be repeated as often as you like or whenever the correct functioning of the machine
is in doubt.
Plane and
Used on Aluminum Alloy Wheels. Weight is to be applied on the Center
clamped to the Outer Edge.
For balancing standard steel or alloy wheels using
clip-on weights attached to inner and outer wheel edges.
(No Symbol Illuminated)
DYNAMIC
3
.
10
S
T
A
T
I
C
-
A
L
U
f
u
n
c
t
i
o
n
s
:
A
L
U
1
:
F
o
r
b
a
l
a
n
c
i
n
g
o
f
t
h
e
l
i
g
h
t
a
l
l
o
y
r
i
m
s
w
i
t
h
a
p
p
l
i
c
a
t
i
o
n
o
f
a
d
h
e
s
i
v
e
w
e
i
g
h
t
s
o
n
t
h
e
r
i
m
s
h
o
u
l
d
e
r
s
A
L
U
2
:
F
o
r
b
a
l
a
n
c
i
n
g
w
h
e
e
l
r
i
m
s
i
n
l
i
g
h
t
a
l
l
o
y
w
i
t
h
a
p
p
l
i
c
a
t
i
o
n
o
f
t
h
e
i
n
n
e
r
s
i
d
e
a
d
h
e
s
i
v
e
w
e
i
g
h
t
.
P
o
s
i
t
i
o
n
o
f
t
h
e
i
n
n
e
r
s
i
d
e
w
e
i
g
h
t
i
s
t
h
e
o
n
s
h
o
w
n
i
n
t
h
e
f
i
g
u
r
e
A
L
U
3
:
F
i
g
.
5
(For balancing wheels of motorcycle, in light alloy or special construction forms)
St.: STATIC correction is required for motorcycle wheels or when it is not possible to place
the counterweights on both sides of the wheel rim.
Press key ALU to select the desired function. For each function, the microprocessor
elaborates the real values of the compensating weight corrected on the basis of the position
of the correction weight and memorizes them quickly on the unbalance displays.
-
3.11 Optimizing the unbalance
The optimizing operation enables you to reduce the amount of weight to add to the wheel in
order to balance it. In many cases,
an improvement of the residual eccentricity on the tire
can also be achieved.
- Press key OPT, The display reads “r.S.”
- Press START The machine runs a measuring cycle.
-
The display gives an instruction to turn the tire on the wheel rim. Make a reference
mark on the adapter and wheel
rim
with chalk, so as to be able to refit the wheel rim on
the bead of the tire in the same position.
- Use a tire changer to rotate the tire through 180 on the wheel rim.
- Fi
t
th
e whee
l
rim b
ac
k on
to
th
e
a
d
ap
te
r i
n
the sam
e
p
o
s
i
ti
o
n as befor
e
.
- Pre
s
s
ST
A
R
T.
Th
e
m
a
c
hi
n
e
run
s a
seco
n
d
mea
s
uri
ng cyc
le
.

–8–
-
T
h
e
d
i
s
p
l
a
y
s
n
o
w
r
e
a
d
a
s
f
o
l
l
o
w
s
:
R
i
g
h
t
h
a
n
d
d
i
s
p
l
a
y
:
%
v
a
l
u
e
(
s
y
m
b
o
l
)
o
f
p
o
s
s
i
b
l
e
u
n
b
a
l
a
n
c
e
r
e
d
u
c
t
i
o
n
c
o
m
p
a
r
e
d
t
o
t
h
e
c
u
rr
e
n
t
c
o
n
d
i
t
i
o
n
o
f
t
h
e
w
h
e
e
l
.
L
e
f
t
h
a
n
d
d
i
s
p
l
a
y
:
C
u
rr
e
n
t
s
t
a
t
i
c
u
n
b
a
l
a
n
c
e
v
a
l
u
e
.
T
h
i
s
i
s
t
h
e
v
a
l
u
e
t
h
a
t
c
a
n
b
e
r
e
d
u
c
e
d
b
y
t
h
e
f
i
g
u
r
e
,
r
e
a
d
o
ff
t
h
e
r
i
g
h
t
h
a
n
d
d
i
s
p
l
a
y
b
y
t
u
r
n
i
n
g
t
h
e
t
i
r
e
o
n
t
h
e
r
i
m
.
L
E
D
s
:
M
a
n
u
a
l
l
y
t
u
r
n
t
h
e
w
h
e
e
l
u
n
t
i
l
t
h
e
o
u
t
e
r
l
e
d
s
l
i
g
h
t
u
p
(
d
i
s
p
l
a
y
p
o
s
i
t
i
o
n
)
;
m
a
r
k
t
h
e
t
o
p
o
f
t
h
e
t
i
r
e
.
C
o
n
t
i
n
u
e
t
h
e
(
m
a
n
u
a
l
)
r
o
t
a
t
i
o
n
a
n
d
s
i
m
i
l
a
r
l
y
m
a
r
k
t
h
e
w
h
e
e
l
r
i
m
w
h
e
r
e
i
t
c
o
rr
e
s
p
o
n
d
s
t
o
t
h
e
p
o
s
i
t
i
o
n
i
n
d
i
c
a
t
e
d
b
y
t
h
e
i
n
n
e
r
l
e
d
s
.
-
U
n
b
a
l
a
n
c
e
o
p
t
i
m
i
z
i
n
g
i
s
a
c
h
i
e
v
e
d
b
y
t
u
r
n
i
n
g
t
h
e
t
i
r
e
o
n
t
h
e
w
h
e
e
l
r
i
m
a
g
a
i
n
(
u
s
i
n
g
a
t
i
r
e
r
e
m
o
v
e
r
)
u
n
t
i
l
t
h
e
t
w
o
m
a
r
k
s
l
i
n
e
u
p
.
P
r
e
s
s
t
h
e
S
T
O
P
k
e
y
t
o
e
n
d
t
h
e
u
n
b
a
l
a
n
c
e
r
e
d
u
c
t
i
o
n
o
p
e
r
a
t
i
o
n
a
n
d
r
e
t
u
r
n
t
o
m
e
a
s
u
r
i
n
g
w
h
e
e
l
u
n
b
a
l
a
n
c
e
.
3
.
1
2
I
n
c
o
n
s
t
a
n
t
u
n
b
a
l
a
n
c
e
r
e
a
d
i
n
g
s
W
h
e
n
a
w
h
e
e
l
h
a
s
b
e
e
n
b
a
l
a
n
c
e
d
,
i
s
r
e
m
o
v
e
d
f
r
o
m
t
h
e
b
a
l
a
n
c
i
n
g
m
a
c
h
i
n
e
a
n
d
t
h
e
n
f
i
t
t
e
d
t
o
i
t
a
g
a
i
n
,
t
h
e
i
n
s
t
r
u
m
e
n
t
s
m
a
y
r
e
a
d
t
h
a
t
t
h
e
w
h
e
e
l
i
s
n
o
t
b
a
l
a
n
c
e
d
.
T
h
i
s
d
o
e
s
n
o
t
d
e
p
e
n
d
o
n
d
e
f
e
c
t
i
v
e
m
a
c
h
i
n
e
r
y
i
n
s
t
r
u
m
e
n
t
s
,
b
u
t
i
s
d
u
e
t
o
t
h
e
w
h
e
e
l
h
a
v
i
n
g
b
e
e
n
f
i
t
t
e
d
b
a
d
l
y
t
o
t
h
e
a
d
a
p
t
e
r
,
i
.
e
.
t
h
e
w
h
e
e
l
i
s
i
n
a
d
i
ff
e
r
e
n
t
p
o
s
i
t
i
o
n
w
i
t
h
r
e
s
p
e
c
t
t
o
t
h
e
b
a
l
a
n
c
i
n
g
m
a
c
h
i
n
e
a
x
i
s
i
n
t
h
e
f
i
r
s
t
a
n
d
s
e
c
o
n
d
f
i
t
t
i
n
g
s
.
I
f
t
h
e
w
h
e
e
l
i
s
f
i
t
t
e
d
t
o
t
h
e
a
d
a
p
t
e
r
w
i
t
h
s
c
r
e
w
s
,
t
h
e
s
c
r
e
w
s
m
a
y
n
o
t
h
a
v
e
b
e
e
n
t
i
g
h
t
e
n
e
d
c
o
rr
e
c
t
l
y
,
i
.
e
.
u
s
i
n
g
t
h
e
c
r
o
s
s
o
v
e
r
s
y
s
t
e
m
,
g
r
a
d
u
a
l
l
y
,
o
r
(
a
s
o
f
t
e
n
h
a
p
p
e
n
s
)
,
t
h
e
h
o
l
e
s
i
n
t
h
e
w
h
e
e
l
m
a
y
h
a
v
e
t
o
o
m
u
c
h
t
o
l
e
r
a
n
c
e
.
S
m
a
l
l
e
rr
o
r
s
,
u
p
t
o
1
0
g
r
a
m
s
(
0
.
4
o
z
)
s
h
o
u
l
d
b
e
c
o
n
s
i
d
e
r
e
d
n
o
r
m
a
l
i
n
w
h
e
e
l
s
f
i
t
t
e
d
o
n
a
c
o
n
e
a
d
a
p
t
e
r
,
t
h
e
e
rr
o
r
i
s
n
o
r
m
a
l
l
y
g
r
e
a
t
e
r
f
o
r
w
h
e
e
l
s
f
i
t
t
e
d
w
i
t
h
s
c
r
e
w
s
o
r
b
l
o
c
k
s
.
I
f
t
h
e
w
h
e
e
l
i
s
f
o
u
n
d
t
o
b
e
s
t
i
l
l
u
n
b
a
l
a
n
c
e
d
w
h
e
n
i
t
i
s
f
i
t
t
e
d
t
o
t
h
e
v
e
h
i
c
l
e
a
f
t
e
r
b
a
l
a
n
c
i
n
g
,
t
h
i
s
d
e
p
e
n
d
s
o
n
t
h
e
u
n
b
a
l
a
n
c
e
s
i
n
t
h
e
v
e
h
i
c
l
e
’
s
b
r
a
k
e
d
r
u
m
s
o
r
v
e
r
y
o
f
t
e
n
o
n
t
h
e
h
o
l
e
s
f
o
r
t
h
e
b
o
l
t
s
o
f
t
h
e
w
h
e
e
l
r
i
m
a
n
d
b
r
a
k
e
d
r
u
m
,
w
h
i
c
h
a
r
e
s
o
m
e
t
i
m
e
s
m
a
d
e
w
i
t
h
t
o
o
m
u
c
h
t
o
l
e
r
a
n
c
e
.
I
n
t
h
i
s
c
a
s
e
,
i
t
m
a
y
b
e
a
d
v
i
s
a
b
l
e
t
o
r
e
b
a
l
a
n
c
e
w
i
t
h
t
h
e
w
h
e
e
l
o
n
t
h
e
v
e
h
i
c
l
e
.
4
.
O
R
D
I
N
A
R
Y
M
A
I
N
T
E
N
A
N
C
E
S
w
i
t
c
h
o
ff
t
h
e
m
a
c
h
i
n
e
’
s
p
o
w
e
r
s
u
p
p
l
y
b
e
f
o
r
e
e
x
e
c
u
t
i
n
g
a
n
y
m
a
i
n
t
e
n
a
n
c
e
o
p
e
r
a
t
i
o
n
s
.
4
.
1
A
d
j
u
s
t
i
n
g
t
h
e
b
e
l
t
p
u
l
l
e
y
1
.
S
l
i
g
h
t
l
y
l
o
o
s
e
n
t
h
e
f
o
u
r
s
c
r
e
w
s
t
h
a
t
s
u
p
p
o
r
t
t
h
e
m
o
t
o
r
a
n
d
m
o
v
e
t
h
e
m
o
t
o
r
t
o
a
d
j
u
s
t
t
h
e
b
e
l
t
t
e
n
s
i
o
n
.
2
.
B
l
o
c
k
t
h
e
f
o
u
r
m
o
t
o
r
s
c
r
e
w
s
c
a
r
e
f
u
l
l
y
,
c
h
e
c
k
t
h
a
t
t
h
e
b
e
l
t
d
o
e
s
n
o
t
p
l
a
y
l
a
t
e
r
a
l
l
y
a
n
d
t
o
u
c
h
t
h
e
c
a
s
i
n
g
w
h
e
n
i
n
m
o
v
e
m
e
n
t
.
4
.
2
C
o
m
p
u
t
e
r
b
o
a
r
d
r
e
p
l
a
c
e
m
e
n
t
M
a
c
h
i
n
e
p
a
r
a
m
e
t
e
r
s
i
n
p
u
t
:
W
h
e
n
t
h
e
c
o
m
p
u
t
e
r
b
o
a
r
d
i
s
t
o
b
e
r
e
p
l
a
c
e
d
b
y
a
n
e
w
o
n
e
,
i
t
i
s
n
e
c
e
s
s
a
r
y
t
o
i
n
s
e
r
t
t
h
e
m
a
c
h
i
n
e
p
a
r
a
m
e
t
e
r
s
.
T
o
p
e
r
f
o
r
m
t
h
i
s
o
p
e
r
a
t
i
o
n
,
a
c
t
a
s
f
o
l
l
o
w
s
:
p
r
e
s
s
p
u
s
h
b
u
t
t
o
n
s
F
+
C
a
s
t
o
e
x
e
c
u
t
e
t
h
e
s
e
l
f
-
c
a
l
i
b
r
a
t
i
o
n
;
W
h
e
n
t
h
e
p
o
s
i
t
i
o
n
L
E
D
s
s
t
o
p
f
l
a
s
h
i
n
g
p
r
e
s
s
t
h
e
f
o
l
l
o
w
i
n
g
p
u
s
h
b
u
t
t
o
n
s
w
i
t
h
i
n
5
s
e
c
o
n
d
s
a
n
d
w
i
t
h
t
h
e
p
r
o
p
e
r
s
e
q
u
e
n
c
e
:
↓
a
+
↑
a
+
F
.
A
f
t
e
r
h
a
v
i
n
g
p
r
e
s
s
e
d
↓
a
a
n
d
↑
a
,
t
h
e
d
i
s
p
l
a
y
s
t
u
r
n
o
ff
,
a
n
d
a
f
t
e
r
h
a
v
i
n
g
p
r
e
s
s
e
d
F
t
h
e
p
r
e
s
e
n
t
v
a
l
u
e
o
f
f
i
x
e
d
d
i
s
t
a
n
c
e
“
D
F
”
a
p
p
e
a
r
s
:
m
o
d
i
f
y
b
y
↑
b
a
n
d
↓
b
.
P
r
e
s
s
t
o
p
a
s
s
↑
a
t
o
t
h
e
m
o
d
i
f
i
c
a
t
i
o
n
o
f
t
h
e
“
I
”
v
a
l
u
e
.