Butler LIBRAK350 User manual

INSTRUCTION MANUAL
• For any further information please contact your local dealer or call:
EN
For spare parts drawings refer to “LIST OF COMPONENTS” section.
TRANSLATION FROM THE
ORIGINAL INSTRUCTIONS
BUTLER ENGINEERING and MARKETING S.p.A. a s. u.
Via dell’Ecologia, 6 - 42047 Rolo - (RE) Italy
Phone [phone] - Fax [phone] - e-mail: [e-mail]
1296-M024-01
LIBRAK350
LIBRAK350PRO
1296-M024-01- Rev. n. 01 (09/2021)

Page 2 of 61
INSTRUCTION, USE AND
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SUMMARY
GENERAL DESCRIPTION _________________ 5
SYMBOLS USED IN THE MANUAL ________ 6
INFORMATION PLATE LOCATION
DRAWING ________________________________ 7
1.0 GENERAL INTRODUCTION __________ 8
1.1 Introduction ____________________________ 8
2.0 INTENDED USE _____________________ 8
2.1 Training of personnel __________________ 8
3.0 SAFETY DEVICES ___________________ 9
3.1 Residual risks __________________________ 9
4.0 GENERAL SAFETY RULES __________ 9
5.0 PACKING AND MOBILIZATION FOR
TRANSPORT _______________________ 10
6.0 UNPACKING ________________________ 11
7.0 MOBILIZATION_____________________ 11
8.0 WORKING ENVIRONMENT
CONDITIONS _______________________ 12
8.1 Working area __________________________12
8.2 Lighting _______________________________12
9.0 MACHINE ASSEMBLY ______________ 13
9.1 Anchoring system _____________________13
9.2 Assembly procedures _________________14
9.2.1 Fitting the shaft on the flange _____14
9.2.2 Protection guard assembly
(standard on some models) ________14
9.2.3 Monitor fitting _____________________15
9.2.4 Fitting of external data gauge
(standard on some models) ________16
10.0 ELECTRICAL CONNECTIONS_______ 17
10.1 Electrical checks ______________________17
11.0 FITTING THE WHEEL ON THE
SHAFT _____________________________ 18
11.1 Wheel assembly _______________________18
12.0 CONTROL PANEL __________________ 19
13.0 WHEEL BALANCING _______________ 19
13.1 Switching the machine on and off_____19
13.2 Balancing programs setting___________20
13.2.1 Programs rapid setting and
measurements through distance-
diameter caliper arm ______________21
13.2.2 Programs setting through
“Measurements acquisition”
screen page ________________________23
13.3 Indicative display of points where to
detect measures/to fit weight__________24
13.3.1 Weights positioning ________________25
13.4 Displaying the active/modifiable field _25
13.5 Wheel balancing screen page
description ____________________________26
13.5.1 Balancing mode____________________28
13.6 Use of machines with disabled
automatic data gauge _________________30
13.6.1 Manual setting of wheel
dimensions ________________________31
13.7 Standard balancing programs ________31
13.7.1 Static ______________________________31
13.7.2 Static-1 ____________________________31
13.7.3 Static-2 ____________________________32
13.7.4 Dynamic ___________________________32
13.7.5 ALU-S ______________________________32
13.7.6 ALU-S1_____________________________32
13.7.7 ALU-S2_____________________________33
13.7.8 ALU-1 ______________________________33
13.7.9 ALU-2 ______________________________33
13.7.10 ALU-3 _____________________________33
13.7.11 ALU-4 _____________________________34
13.8 Optional balancing programs _________34
13.8.1 ECO-WEIGHT mode ________________34
13.8.2 SPLIT mode________________________36
13.8.3 Weights hidden behind spokes
mode _______________________________38
13.8.4 Matching mode_____________________40
13.9 Special balancing programs __________42
13.9.1 Pax_________________________________42
13.10 Recalculation function _______________43
13.11 Wheel balancing in Motorcycle mode
(with distance caliper extension Kit) __43
14.0 USER MENU (OPTIONS AND
CALIBRATION) _____________________ 44
14.1 Options menu _________________________44
14.1.1 Lower weight limit ________________46
14.1.2 Setting adhesive weight
dimensions and static threshold
percentage _________________________47
14.1.3 User management__________________47
14.2 Enabling of electronic Run-out
measuring device _____________________48
14.3 Machine calibrations __________________49
14.3.1 Chuck “0” (zero) calibration _______50
14.3.2 Weight measurement sensors
calibration _________________________50
14.3.3 Gauges calibration_________________52
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EN
15.0 ERROR SIGNALS ___________________ 56
16.0 ROUTINE MAINTENANCE __________ 57
17.0 TECHNICAL DATA__________________ 58
17.1 Technical electrical data ______________58
17.2 Technical mechanical data ____________58
17.3 Dimensions____________________________59
18.0 STORING___________________________ 60
19.0 SCRAPPING ________________________ 60
20.0 REGISTRATION PLATE DATA ______ 60
21.0 FUNCTIONAL DIAGRAMS __________ 60
Drawing A - Electrical connection diagram _61
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EN
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INSTRUCTION, USE AND
MAINTENANCE MANUAL
Model
Feature / Fixtures / Versions
LIBRAK350
LIBRAK350PRO
External data gauge OPT 
1 off-road vehicle cone D.88-132 
 = standard
OPT = optional
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GENERAL DESCRIPTION Fig. 1
KEY
1 – Weight holding bridge
2 – Monitor
3 – Distance-diameter caliper
4 – Threaded chuck
5 – Protection guard
6 – Pedal brake
7 – Main switch
8 – Grippers for weight fitting
9 – Rapid ring nut
10 – Pressure ring
11 – Grippers for weights
12 – Carriages counterweight
13 – Cones + protection cup
14 – Manual caliper
15 – External data gauge
(standard on some models)
16 – Off-road vehicle cone D.88 -132
(standard on some models)
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EN
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INSTRUCTION, USE AND
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SYMBOLS USED IN THE MANUAL
Symbols Description
Read instruction manual.
Wear work gloves.
Wear work shoes.
Wear safety goggles.
Warning. Be particularly careful
(possible material damages).
Mandatory. Operations or jobs
to be performed compulsorily.
Symbols Description
Danger! Be particularly careful.
Move with fork lift truck or pal-
let truck.
Lift from above.
Note. Indication and/or useful
information.
Attention: never lift the machine
by means of the chuck.
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EN Page 7 of 61
INFORMATION PLATE LOCATION DRAWING

Code numbers of plates
99990114 Arrow plate
99990758 Electric shock danger plate
999910050 Protection device use plate
999912940 Lifting plate
999914160 230V 50/60 Hz 1 Ph voltage plate
999915200 Serial number plate
999916311 Rubbish skip plate
999917640 Manufacturer plate
999924470 Machine nameplate
■QR code plate
IF ONE OR MORE PLATES DISAPPEAR FROM THE MACHINE OR BECOMES DIFFICULT
TO READ. REPLACE IT AND QUOTE ITS/THEIR CODE NUMBER/S WHEN REORDERING.
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INSTRUCTION, USE AND
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SOME OF THE PICTURES AND/
OR DISPLAY SCREEN PAGES
PRESENT IN THIS MANUAL HAVE
BEEN OBTAINED FROM PICTURES
OF PROTOTYPES, THEREFORE
THE STANDARD PRODUCTION MA-
CHINES AND ACCESSORIES CAN
BE DIFFERENT IN SOME COMPO-
NENTS/DISPLAY SCREEN PAGES.
1.0 GENERAL INTRODUCTION
This manual is an integral part of the product and
must be retained for the whole operating life of the
machine.
Carefully study the warnings and instructions con-
tained in this manual. It contains important instruc-
tions regarding FUNCTIONING, SAFE USE and
MAINTENANCE.
KEEP THE MANUAL IN A KNOWN,
EASILY ACCESSIBLE PLACE FOR
ALL ACCESSORY OPERATORS
TO CONSULT IT WHENEVER IN
DOUBT.
THE MANUFACTURER DISCLAIMS
ALL RESPONSIBILITY FOR ANY
DAMAGE OCCURRED WHEN THE
INDICATIONS GIVEN IN THIS
MANUAL ARE NOT RESPECTED:
AS A MATTER OF FACT, THE NON-
COMPLIANCE WITH SUCH INDI-
CATIONS MIGHT LEAD TO EVEN
SERIOUS DANGERS.
1.1 Introduction
Thank you for purchasing this wheel balancer. We feel
sure you will not regret your decision.
This machine has been designed for use in profes-
sional workshops and stands out for its reliability
and easy, safe and rapid operation. With just a small
degree of maintenance and care, this wheel balancer
will give you many years of trouble-free service and
lots of satisfaction.
2.0 INTENDED USE
The machine described in this manual , and their
different versions, is a wheel balancing machine
for car and light transport, projected to be used
exclusively to cancel out, or at least reduce to ac-
ceptable limits the vibrations of the wheels, by fitting
counterweights, of suitable size and in specific posi-
tions to the wheels that are not correctly balanced.
EMPLOYING THIS MACHINE OUT-
SIDE THE USE DESTINATION IT
HAS BEEN DESIGNED FOR (AS
INDICATED IN THIS MANUAL) IS
INAPPROPRIATE AND DANGER-
OUS.
THE MANUFACTURER CANNOT
BE HELD RESPONSIBLE FOR ANY
DAMAGE CAUSED BY IMPROPER,
ERRONEOUS, OR UNACCEPTABLE
USE.
2.1 Training of personnel
The machine may be operated only by suitably
trained and authorized personnel.
Given the complexity of the operations necessary to
manage the machine and to carry out the operations
safely and efficiently, the personnel must be trained
in such a way that they learn all the information
necessary to operate the machine as intended by the
manufacturer.
A CAREFUL READING OF THIS
INSTRUCTION MANUAL FOR
USE AND MAINTENANCE AND A
SHORT PERIOD OF TRAINING
WITH SKILLED PERSONNEL CAN
BE ENOUGH PREVENTIVE PREPA-
RATION.
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EN
3.0 SAFETY DEVICES
DAILY CHECK THE INTEGRITY
AND THE FUNCTIONALITY OF
THE SAFETY AND PROTECTION
DEVICES ON THE MACHINE.
•Controllogicdisposition
Its function is to prevent the operator from danger-
ous mistakes.
•Mainswitchpositionedontherearofthemachine
Its function is to disconnect machine electric supply.
•Protectionguard
Its function is to protect the operator from possible
projections of materials on the wheel during its spin.
Wheel spinning is normally prevented if the wheel
protection guard is raised (open). When the
protection guard is open, this interrupts the cir-
cuit that triggers the motor and automatic start
is prevented, including in the case of an error.
Press key to stop wheel in emergency condi-
tions.
3.1 Residual risks
The machine was subjected to a complete analysis of
risks according to reference standard EN ISO 12100.
Risks are as reduced as possible in relation with tech-
nology and product functionality.
Possible residual risks have been emphasized through
pictorial representations and warnings which placing
is indicated in “ PLATE POSITIONING DRAWING” at
page 7.
4.0 GENERAL SAFETY RULES
• Any tampering with or modification to the machine
not previously authorized by the manufacturer ex-
empts the latter from all responsibility for damage
caused by or derived from said actions.
• Removing of or tampering with the safety devices or
with the warning signals placed on the machine leads
to serious dangers and represents a transgression of
European safety standards.
• Use of the machine is only permitted in places free
from explosion or fire hazard and in dry places
under cover.
• Original spare parts and accessories should be used.
THE MANUFACTURER DENIES
ANY RESPONSIBILITY IN CASE
OF DAMAGES CAUSED BY UNAU-
THORIZED MODIFICATIONS OR
BY THE USE OF NON ORIGINAL
COMPONENTS OR EQUIPMENT.
• The installation must be performed by qualified and
authorized personnel in full compliance with the
instructions given below.
• Ensure that there are no dangerous situations dur-
ing the machine operating manoeuvres. Immediately
stop the machine if it miss-functions and contact the
customer service of an authorized dealer.
• In emergency situations and before carrying out any
maintenance or repairs, disconnect all supplies to the
equipment by using the main switch, placed on the
equipment itself, and unplugging the power supply.
• The machine power supply system must be equipped
with an appropriate earthing, to which the yellow-
green machine protection wire must be connected.
• Ensure that the work area around the machine is
free of potentially dangerous objects and that there
is no oil since this could damage the tyre. Oil on the
floor is also a potential danger for the operator.
• UNDER NO CIRCUMSTANCES must the machine be
used to spin anything but vehicle wheels. Bad locking
can cause rotating parts to come loose, with potential
damage to the machine and anything in the vicinity
and injury to the operator.
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INSTRUCTION, USE AND
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5.0 PACKING AND MOBILIZATION FOR
TRANSPORT
HAVE THE MACHINE HANDLED BY SKILLED
PERSONNEL ONLY.
THE LIFTING EQUIPMENT MUST WITHSTAND
A MINIMUM RATED LOAD EQUAL TO THE
WEIGHT OF THE PACKED MACHINE (SEE
PARAGRAPH “TECHNICAL SPECIFICATIONS”).
The machine is packed partially assembled.
Movement must be by pallet-lift or fork-lift trolley.
The fork lifting points are indicated on the packing.
Fig. 2
OPERATORS MUST WEAR SUIT-
ABLE WORK CLOTHES, PROTEC-
TIVE GLASSES AND GLOVES,
AGAINST THE DANGER FROM
THE SPRAYING OF DANGEROUS
DUST, AND POSSIBLY LOWER
BACK SUPPORTS FOR THE LIFT-
ING OF HEAVY PARTS. DANGLING
OBJECTS LIKE BRACELETS MUST
NOT BE WORN, AND LONG HAIR
MUST BE TIED UP. FOOTWEAR
SHOULD BE ADEQUATE FOR THE
TYPE OF OPERATIONS TO BE CAR-
RIED OUT.
• The machine handles and operating grips must be
kept clean and free from oil.
• The workshop must be kept clean and dry. Make
sure that the working premises are properly lit.
The machine can be operated by a single operator.
Unauthorized personnel must remain outside the
working area, as shown in Fig. 3.
Avoid any hazardous situations. Do not use air-
operated or electrical equipment when the shop is
damp or the floor slippery and do not expose such
tools to atmospheric agents.
• When operating and servicing this machine, carefully
follow all applicable safety and accident-prevention
precautions.
The machine must not be operated by untrained
personnel.
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EN
7.0 MOBILIZATION
THE LIFTING EQUIPMENT MUST WITHSTAND
A MINIMUM RATED LOAD EQUAL TO THE
WEIGHT OF THE MACHINE (SEE PARAGRAPH
TECHNICAL SPECIFICATIONS). DO NOT AL-
LOW THE LIFTED MACHINE TO SWING.
NEVER LIFT THE MACHINE BY MEANS OF THE
CHUCK.
If the machine has to be moved from its normal work
post, the movement must be conducted following the
instructions listed below.
• Protect the exposed corners with suitable material
(Pluribol/cardboard).
• Do not use metallic cables for lifting.
• Make sure that the power supply is not connected.
• Place again the machine onto the original pallet with
whom it was delivered.
• Use transpallet or fork-lift for handling.
6.0 UNPACKING
DURING UNPACKING, ALWAYS
WEAR GLOVES TO PREVENT ANY
INJURY CAUSED BY CONTACT
WITH PACKAGING MATERIAL
(NAILS, ETC.).
The cardboard box is supported with plastic strapping.
Cut the strapping with suitable scissors. Use a small
knife to cut along the lateral axis of the box and open
it like a fan.
It is also possible to unnail the cardboard box from
the pallet it is fixed to. After removing the packing, and
in the case of the machine packed fully assembled,
check that the machine is complete and that there is
no visible damage.
If in doubt do not use the machine and refer to pro-
fessionally qualified personnel (to the seller).
The packing (plastic bags, expanded polystyrene, nails,
bolts, timber, etc.) should not be left within reach of
children since it is potentially dangerous. These ma-
terials should be deposited in the relevant collection
points if they are pollutants or non biodegradable.
THE BOX CONTAINING THE FIX-
TURES IS CONTAINED IN THE
WRAPPING. DO NOT THROW IT
AWAY WITH THE PACKING.
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INSTRUCTION, USE AND
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The base floor must be able to support the loads trans-
mitted during operation.
This surface must have a capacity load of at least 500
Kg\m² (102 lb/ft2).
The depth of the solid floor must be sufficient to guar-
antee that the anchoring bolts hold.
8.2 Lighting
The machine does not require its own lighting for
normal working operations. However, it must be used
in an adequately lit environment.
8.0 WORKING ENVIRONMENT CONDI-
TIONS
The machine must be operated under proper condi-
tions as follows:
• temperature: +5 °C ÷ +40 °C (+41 °F ÷ +104 °F)
• relative humidity: 30 - 95% (dew-free)
• atmospheric pressure: 860 - 1060 hPa (mbar)
(12.5 ÷ 15.4 psi).
The use of the machine in ambient conditions other
than those specified above is only allowed after prior
agreement with and approval of the manufacturer.
8.1 Working area
Fig. 3
USE THE MACHINE IN A DRY AND SUFFI-
CIENTLY ILLUMINATED PLACE, CLOSED, PRO-
TECTED FROM ALL WEATHER CONDITIONS
AND COMPLYING WITH THE REGULATIONS IN
FORCE REGARDING WORK SAFETY.
The location of the machine requires a usable space
as indicated in Fig. 3. The positioning of the ma-
chine must be according to the distances shown.
From the control position the operator is able to
observe all the machine and surrounding area. He
must prevent unauthorized personnel or objects
that could be dangerous from entering the area.
The machine must be secured to a flat floor surface,
preferably of cement or tiled. Avoid yielding or irregu-
lar surfaces.
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EN
9.0 MACHINE ASSEMBLY
EACH MECHANICAL INTERVEN-
TION MUST BE CARRIED OUT BY
PROFESSIONALLY QUALIFIED
STAFF.
After having freed the various components from the
packing check that they are complete, and that there
are no anomalies, then comply with the following in-
structions for the assembly of the components making
use of the attached series of illustrations.
9.1 Anchoring system
The packed machine is fixed to the support pallet
through the holes prearranged on the frame and in-
dicated in the figure below. Such holes can be used
also to secure the machine to the ground, using floor
anchors (not included in the supply). Before carrying
out the definitive fixing, check that all the anchor points
are laid down flat and correctly in contact with the fix-
ing surface itself. If not so, insert shimming profiles
between the machine and the fixing lower surface, as
indicated in Fig. 4.
IT IS MANDATORY TO SECURE, IF
WHEELS WEIGHING MORE THAN
30 KG / 66 LBS ARE USED.
a= 270 mm / 10.63”
b= 480 mm / 18,90”
Fig. 4
• To fasten the product to the ground, use anchoring
plugs (Fig._4 ref. 1) with a threaded shank M8 (UNC
5/16) suitable for the floor on which the tyre changer
will be fixed and in a number equal to the number
of fixing holes arranged on the bottom frame;
• drill holes in the floor, suitable for inserting the
chosen anchors, in correspondence with the holes
arranged on the bottom frame;
• insert the anchors into the holes made in the floor
through the holes on the bottom frame and tighten
the threaded elements;
• tighten the anchors on the base frame by applying a
torque equal to that indicated by the manufacturer
of the anchors.
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INSTRUCTION, USE AND
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9.2 Assembly procedures
9.2.1 Fitting the shaft on the flange
Screw the shaft with a 27 mm open wrench (Fig. 5
ref. 1) on the flange (Fig. 5 ref. 2).
Fig. 5
9.2.2 Protection guard assembly (standard
on some models)
1. Screw the 3 bolts (Fig. 6 ref. 1) and the washers
(Fig. 6 ref. 2) to the guard support (Fig. 6 ref. 3)
in the special inserts positioned in the rear side of
the frame, by means of an Allen wrench.
2. Fit the microswitch (Fig. 6 ref. 4) to the plate
(Fig. 6 ref. 5) using bolts (Fig. 6 ref. 6), washers
(Fig. 7 ref. 7) and nuts (Fig. 6 ref. 8).
3. Secure the plate complete with microswitch (Fig. 6
ref. 3) using bolts (Fig. 6 ref. 9), washers (Fig. 6
ref. 10) and nuts (Fig. 6 ref. 11).
PAY ATTENTION: MICROSWITCH
LEVER (FIG. 6 REF. 4) MUST BE
ADJUSTED BY SCREWDRIVER.
4. Mount the protection guard (Fig. 6 ref. 12) to the
support (Fig. 6 ref. 3) interposing the washers
(Fig. 6 ref. 13 and 14) and block it through the
seeger (Fig. 6 ref. 15).
5. Fit the spring (Fig. 6 ref. 16) between the base of
the support and the anchor pin.
6. Connect the 2 wires (Fig. 6 ref. 17) from inside
the frame to the normally open (NO) microswitch
contacts (Fig. 6 ref. 4).
Fig. 6
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EN
9.2.3 Monitor fitting
1. Remove the nuts (Fig. 7 ref. 1) and the washers
(Fig. 7 ref. 2) from the bolts (Fig. 7 ref. 3). Fit
the support pipe (Fig. 7 ref. 4), turned by 90°,
and pay attention to the monitor and keyboard
cables (Fig. 7 ref. 5) inside it. Insert the guard
monitor(Fig. 7 ref. 6) into the monitor support
(Fig. 7 ref. 4). Into the support pipe (Fig. 7 ref. 4),
fit the monitor support (Fig. 7 ref. 7) and lock it
through the nut (Fig. 7 ref. 8). Then screw the
previously removed nuts and washers again.
Fig. 7
2. Connect the plugs on the power supply sockets and
monitor signal. Connect the wiring of the keyboard.
3. Secure the monitor (Fig. 8 ref. 1) to the support
(Fig. 8 ref. 2) with the bolts (Fig. 8 ref. 3) and the
washers (Fig. 8 ref. 4) supplied.
Fig. 8
4. Mount the guard (Fig. 9 ref. 1) to the support
(Fig. 9 ref. 2) with the 6 bolts (Fig. 9 ref. 3) and
the washers (Fig. 9 ref. 4) supplied.
Fig. 9
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INSTRUCTION, USE AND
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9.2.4 Fitting of external data gauge (stand-
ard on some models)
1. Remove the protection guard (Fig. 10 ref. 12), if
already present.
2. Remove the bolts (Fig. 10 ref. 10) and the washers
(Fig. 10 ref. 11) from the wheel cover support, be-
ing very careful about holding the same support.
Insert the gauge bracket (Fig. 10 ref. 2) into the
lateral slot of the wheel cover support (see Fig. 12
ref. A).
3. If necessary, remove the microswitch (Fig. 10
ref. 13) so that it is possible to reach the securing
bolts more easily.
4. Fit the fixing bolt (Fig. 10 ref. 1) and bolts (Fig. 10
ref. 10), previously removed, into the gauge bracket
(Fig. 10 ref. 2); then screw the assembly to the
threaded rivets placed on the rear part of the frame,
without using the previously removed washers
(Fig. 10 ref. 11). Secure bracket (Fig. 10 ref. 4)
to the support guard (Fig. 10 ref. 14) with the bolts
(Fig. 10 ref. 8) and the washers (Fig. 10 ref. 9).
Lock the gauge arm (Fig. 10 ref. 3) to the brackets
(Fig. 10 ref. 2-4) using the 2 bolts (Fig. 10 ref. 5),
the washers (Fig. 10 ref. 6) and the nuts (Fig. 10
ref. 7), so that the shaft and the gauge arm are lev-
elled (see Fig. 11).
Fig. 10
5. Also make sure the gauge tip (Fig. 11 ref. 1) is
positioned APPROXIMATELY at the centre of the
chuck.
Fig. 11
6. Connect connector (Fig. 12 ref. 1) of the cable com-
ing from inside the machine to connector (Fig. 12
ref. 2) of the cable coming from the gauge arm. Fit
the section of the cable with the connectors inside
the arm (Fig. 12 ref. 3).
7. Fasten the cable with clamps.
8. Enable the external data gauge and carry out the
device calibration.
Fig. 12
9. Mount microswitch again (Fig. 10 ref. 13), if previ-
ously removed.
10. Fit the protection guard (Fig. 10 ref. 12), as de-
scribed in Par. 9.3.2..
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EN
10.0 ELECTRICAL CONNECTIONS
EVEN THE TINIEST PROCEDURE
OF AN ELECTRICAL NATURE
MUST BE CARRIED OUT BY PRO-
FESSIONALLY QUALIFIED STAFF.
BEFORE CONNECTING THE MA-
CHINE MAKE SURE THAT:
•POWERLINESPECIFICATIONS
CORRESPOND TO MACHINE
REQUIREMENTS AS SHOWN ON
THE MACHINE PLATE;
•ALL MAIN POWER COMPO-
NENTS ARE IN GOOD CONDI-
TION;
•THE ELECTRICAL SYSTEM
IS PROPERLY GROUNDED
(GROUND WIRE MUST BE THE
SAME CROSS-SECTION AREA
AS THE LARGEST POWER SUP-
PLY CABLES OR GREATER);
•MAKE SURE THAT THE ELEC-
TRICAL SYSTEM FEATURES A
CUTOUT WITH DIFFERENTIAL
PROTECTION SET AT 30 mA.
Connect the machine up to the mains by means of
the 3-pole plug provided (230 V 1-phase) through the
wall socket.
If the plug provided is not suitable for the wall socket,
fit a plug that complies with local and applicable regu-
lations. This operation must be performed by expert
and professional personnel.
FIT A TYPE-APPROVED (AS RE-
PORTED BEFORE) PLUG TO THE
MACHINE CABLE (THE GROUND
WIRE IS YELLOW/GREEN AND
MUST NEVER BE CONNECTED TO
ONE OF THE TWO PHASE LEADS).
MAKE SURE THAT THE ELECTRI-
CAL SYSTEM IS COMPATIBLE
WITH THE RATED POWER AB-
SORPTION SPECIFIED IN THIS
MANUAL AND APT TO ENSURE
THAT VOLTAGE DROP UNDER
FULL LOAD WILL NOT EXCEED
4% OF RATED VOLTAGE (10%
UPON START-UP).
FAILURE TO OBSERVE THE ABOVE
INSTRUCTIONS WILL IMMEDIATE-
LY INVALIDATE THE WARRANTY.
10.1 Electrical checks
BEFORE STARTING UP THE
WHEEL-BALANCER, BE SURE TO
BECOME FAMILIAR WITH THE LO-
CATION AND OPERATION OF ALL
CONTROLS AND CHECK THEIR
PROPER OPERATION (SEE PAR.
“CONTROLS”).
CARRY OUT A DAILY CHECK OF
THE MAINTAINED ACTION CON-
TROLS CORRECT FUNCTIONING,
BEFORE STARTING MACHINE
OPERATION.
Once the plug/socket connection has been made, turn
on the machine using the main switch (Fig. 13 ref. 1).
Fig. 13
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Page 18 of 61
INSTRUCTION, USE AND
MAINTENANCE MANUAL EN
11.0 FITTING THE WHEEL ON THE
SHAFT
To achieve perfect balancing, the wheel must be care-
fully and properly fitted on the shaft.
Imperfect centring will inevitably cause unbalances.
WHAT IS MOST IMPORTANT IS
THAT ORIGINAL CONES AND
ACCESSORIES, SPECIALLY DE-
SIGNED TO BE EMPLOYED WITH
THE WHEEL BALANCERS, ARE
USED.
Wheel fitting using the cones provided is illustrated
below.
For alternative fittings, using optional accessories, refer
to the special instructions provided separately.
11.1 Wheel assembly
1. Remove any type of foreign body from the wheel
(Fig. 14 ref. 3): already-existing weights, stones
and mud, and make sure the shaft (Fig. 14
ref. 1):and the rim centring area are clean before
fitting the wheel on the shaft.
2. Carefully choose the cone (Fig. 14 ref. 2) most suit-
able for the wheel to be balanced. These accessories
must be selected according to the shape of the rim.
Carefully position the wheel (Fig. 14 ref. 3), fit-
ting the cone (Fig. 14 ref. 2) on the shaft (Fig. 14
ref. 1) (otherwise this could seize) until this rests
against the support flange (Fig. 14 ref. 4).
3. Fit the wheel with the inner side of the rim towards
the wheel balancer and against the cone.
Fig. 14
4. Fit the protection cap (Fig. 15 ref. 1) in the locknut
(Fig. 15 ref. 2) and fasten against the wheel.
Fig. 15
Some aluminium wheels, with very high centring, must
be fitted with the cone outside the wheel.
5. Clean the shaft (Fig. 16 ref. 1) before fitting the
wheel.
6. Fit the wheel (Fig. 16 ref. 3) with the inside of the
rim towards the wheel balancer, until the wheel is
up against the support flange (Fig. 16 ref. 2).
Fig. 16
7. Fit the cone (Fig. 17 ref. 3) with the narrowest part
turned towards the wheel.
8. Fit the pressure ring (Fig. 17 ref. 1) in the nut
(Fig. 17 ref. 2) and fasten the cone (Fig. 17
ref. 3).
Fig. 17
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LIBRAK350 - LIBRAK350PRO

INSTRUCTION, USE AND
MAINTENANCE MANUAL
Page 19 of 61
EN
THE PRESSURE RING (FIG. 17
REF. 1) MUST BE MOUNTED WITH
THE TEETH OR DISCHARGE SIDE
TOWARDS THE RING-NUT (FIG. 17
REF. 2).
12.0 CONTROL PANEL
The wheel balancers are equipped with a control panel
equipped with a keyboard to interact/operate the con-
trols presented in graphical form on the monitor.
On the monitor are displayed all the instructions for the
correct wheel balancing, for example indicating where
the operator shall fit adhesive or clip weights and the
balancing mode and/or option used, as well as correct
wheel rotation for inner/outer weights positioning.
Fig. 18
KEY
1 – Monitor
2 – Function push button (red)
3 – Function push button (yellow)
4 – Function push button (grey)
5 – Function push button (blue)
6 – Function push button (green)
7 – Previous page push button
8 – Next page/print push button
9 – Push button panel (keyboard with 7 keys)
LIBRAK350 - LIBRAK350PRO
1296-M024-01
13.0 WHEEL BALANCING
13.1 Switching the machine on and off
Press the "ON" switch (Fig. 13 ref. 1), located in the
rear part of the equipment.
Wait a few seconds up to the complete loading of the op-
erational program. The equipment is ready to operate
when the main screen "Home" appears on the monitor.
Fig. 19
1 2 34A B C
KEY
A – Displaying operations/information area
B – Colours for identification of the buttons to be
used
C – Function icons
1 – Programs and measurements acquisition but-
tons
2 – Wheel spin push button
3 – Go to next page
4 – User management (if enabled) (user manage-
ment is not enabled on machine delivery)

Page 20 of 61
INSTRUCTION, USE AND
MAINTENANCE MANUAL EN
WHEN THE EQUIPMENT IS
TURNED OFF LOSES ALL THE
MEASUREMENTS AND THE
STORED DATA (SIZE, SPINS, US-
ERS, ETC ...). AT RESTARTING,
PRESSING THE BUTTON (IN
THE CASE HAVE NOT YET BEEN
STORED ON THE NEW MEASURES
AFTER THE SWITCHING ON), THE
MACHINE DOES NOT PERFORM
ANY OPERATION.
13.2 Balancing programs setting
The setting of the balancing programs can be per-
formed in two ways:
- through the gauge arm (rapid setting);
- through “Measurement being acquired” screen, ap-
pearing when the button is pressed (Fig. 19
ref. 1).
The setting modes are completely different even if
they allow to reach the same result (but with different
times).
At the bottom of the main screen page and of each
screen page described below, there will be coloured
rectangles (Fig. 19 ref. B) located above function
identification icons (Fig. 19 ref. C). These functions
are activated by pressing the appropriate coloured but-
ton on the push-button panel (Fig. 18 ref. 9). Press
the button (Fig. 19 ref. 3) to display a second page
where you can access the "Technical assistance" menu
and the "Run-out" menu (see Fig. 20).
Fig. 20
1 23 4
KEY
1 – User menu
2 – Run-out menu (visible only if active)
3 – Return to previous page
4 – Measurement unit setting.
The machine is supplied with “grams” option
enabled (see Chap. 14.0), so weights will
be displayed only in grams and no icons will
be displayed onto push button 4.
In order to modify the measurement unit carry
out the following procedure: if “ounce” option
is activated from user menu (see Chap.
14.0), “ounce” weight displaying mode is set,
and push button will be displayed. Press
the button to set machine weight display
in grams and on the screen will be displayed
icon . Press the button to set ma-
chine weight display in ounces and on the
screen will be displayed icon .
In order to turn off the machine, simply press the “OFF”
main switch (Fig. 13 ref. 1).
1296-M024-01
LIBRAK350 - LIBRAK350PRO