COREMO OCMEA A3-3N Operating instructions

A Dual
Model A3-3N
Model A1-2N
D Dual
Model D3-3N
Model D1-2N
F Dual
Model F3-3N
Model F1-2N
G Dual
Model G3-3N
Model G1-2N
COREMO OCMEA S.P.A.
Via Galilei, 12 - 20090 Assago (MI) - Italy
Tel. [phone] Fax [phone]
www.coremo.it [email protected]
User and Maintenance Manual
Translation of the original instructions
EN 130701 REV. 1
ISO 9001 - Certificate N°0238

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Page 2of 16
TABLE OF CONTENTS
1. Introduction ............................................................................................................................................ 3
2. Manufacturer .......................................................................................................................................... 3
3. General information................................................................................................................................ 3
4. Warnings ................................................................................................................................................. 4
5. Technical data ......................................................................................................................................... 5
5.1. Product performance .............................................................................................................................. 5
5.2. Brake lining wear..................................................................................................................................... 7
5.3. Special note............................................................................................................................................. 7
6. Transport and storage............................................................................................................................. 7
7. Installation............................................................................................................................................... 8
8. Operation .............................................................................................................................................. 11
8.1. Power supply of the safety component ................................................................................................ 11
8.2. Improper use......................................................................................................................................... 11
9. Maintenance and cleaning.................................................................................................................... 11
9.1. Readjusting the play.............................................................................................................................. 12
9.2. Changing the lining pads and cleaning the friction surfaces................................................................. 12
9.3. Changing the thruster springs............................................................................................................... 12
9.4. Changing the brake shoe alignment springs ......................................................................................... 13
9.5. Changing the gaskets............................................................................................................................. 14
9.6. Periodic maintenance............................................................................................................................ 15
10. Spare parts list....................................................................................................................................... 15

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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1. Introduction
The purpose of this manual is to provide the user with all the information necessary to use the
product properly, independently and safely.
This manual constitutes an integral part of the safety features and must be read in its entirety
before installation and use of the product. It must therefore be kept in a safe place should future
reference be necessary before proceeding with any kind of work.
The user is strongly advised to read it carefully and to follow the rules and procedures contained
in it as these provide important information concerning safe use and maintenance.
If any doubt should arise concerning the correct interpretation of the instructions, contact our
technical department for the necessary clarification.
It is prohibited for anyone to disclose or modify the content of this manual or to use it for
personal purposes.
2. Manufacturer
COREMO OCMEA S.P.A.
Via Galilei, 12 - 20090 Assago (MI) - Italy
Tel.: [phone] Fax: [phone]
e-mail: in[email protected]
3. General information
Correct use of the product: In compliance with Italian Legislative Decree 17/2010 and DIRECTIVE
2006/42/EC the operating limits for ideal and safe use of the product are stated in this manual.
Design parameters: COREMO OCMEA caliper brakes have been designed for use in conformity with the
performance and conditions stated in the catalogue and Chapter 5.1 of this manual. It is advisable not to
exceed these limitations.
Model selection: Selection of the correct model for a given application is of basic importance. When
selecting a model an appropriate service factor must be taken into consideration. In the case of failsafe

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Page 4of 16
brakes the service factor must not be less than 2. The technical department of COREMO OCMEA can
provide you with information, suggestions and assistance regarding correct application and use.
Use: Compliance with the assembly and maintenance instructions prevents not only costly down time
but also accidents due to incomplete knowledge of the product.
Rotating parts: The caliper brakes are coupled mainly with rotating parts. In this case the moving parts
must be protected in conformity with the requirements of DIRECTIVE 2006/42/EC and Italian Legislative
Decree 17/2010 or equivalent legislation in force in the countries in which they are used.
Power source for pneumatic brakes: Use air not contaminated with oil or water and a 25 micron filter
with automatic condensation discharge.
Failsafe spring brakes: Failsafe spring brakes must be handled with special care as they contain
mechanically preloaded springs. To avoid the risk of accidents during maintenance it is necessary to
follow the instructions in this manual and those highlighted in red on the label attached to the brake.
Friction material: All COREMO OCMEA caliper brakes are fitted with friction material which is absolutely
free of asbestos and is declared as NON toxic/harmful in full observance of health and environment
regulations and laws. In any case it is better not to inhale dust produced by them and to wash hands
thoroughly before eating or drinking.
Oils, greases, lubricating components: These are used in extremely limited quantities. Personnel
suffering from allergies to these substances are advised to wear gloves or use protective cream which
must be washed off thoroughly before eating or drinking.
Product markings: All the data on the plates must always be kept legible. Use the data shown on the
plates when contacting the manufacturer for spare parts, information or assistance for example.
Disposal: Worn brake lining pads and other materials of which brakes are made are classified as special
NON toxic/harmful products and therefore must be disposed of in accordance with the laws in force in
the countries in which they are used.
4. Warnings
Failure to follow the instructions in this manual and on any plates attached to the
product exposes persons to risks and may cause damage to other equipment and
machinery.
˗The product must not be used at an ambient temperature lower than -20 °C.
˗The disc must be made of iron alloy (cast iron or steel) having a hardness in the range 190 to 220
HB.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Page 5of 16
The technical department of COREMO OCMEA can provide additional information in order to ensure
correct application and use of the product.
Dangers caused by a power failure: A power failure will cause the brake to be applied suddenly. It is
therefore necessary to provide an uninterrupted power supply or, if the case requires, use suitable
power failure warning systems as a brake failure may cause personal injury and damage to property.
Danger of breakage during operation: To reduce the risk of breakage during operation carry out the
periodic inspections shown in this manual.
Risks connected with changes in operating conditions: The product is designed for the purposes stated
in this user and maintenance manual therefore the minimum power supply pressure necessary to allow
the brake to open and the maximum pressure required for the brake to work safely and reliably are
indicated. The operating conditions also vary depending on the diameter of the brake disc used; this
manual contains an equation to calculate the dynamic torque provided as a function of the disc
diameter. Please note that an erroneous calculation may result in a braking torque different to the
desired value which could compromise aspects of safety.
Residual risk: Residual risk can be attributed to the operator not following all the procedures stated in
the user and maintenance manual and not giving due consideration to the warnings.
5. Technical data
5.1. Product performance
The DUAL brake is to be used for operating stops, emergency stops or holding stops.
Use of the product for any purpose other than those indicated may represent a risk to
any aspect of safety.
The type “Dual” caliper brakes are different basically due to the type of caliper (A, D, F e G) and to the
dimension of the pneumatic actuator (3-3N e 1-2N); the table below shows the tangential force for each
brake type considering a coefficient of friction of 0.4
Warning: The value of the friction coefficient is purely theoretical as it depends on environmental
conditions and on how the product is used.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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TYPE
Tangential Force
A3-3N DUAL
12490 N at 6 bar
10970 N failsafe brakes
A1-2N DUAL
4820 Nat 6 bar
5500 N failsafe brakes
D3-3N DUAL
11620 Nat 6 bar
10400 N failsafe brakes
D1-2N DUAL
4480 Nat 6 bar
5250 N failsafe brakes
F3-3N DUAL
11620 Nat 6 bar
10400 N failsafe brakes
F1-2N DUAL
4480 Nat 6 bar
5250 N failsafe brakes
G3-3N DUAL
11620 Nat 6 bar
10400 N failsafe brakes
G1-2N DUAL
4480 Nat 6 bar
5250 N failsafe brakes
The table shows the values obtained with 8 springs for a failsafe caliper brakes; proportionately lower
values can be obtained with 6, 4 or 2 springs.
Dynamic torque
The dynamic torque provided by the brake will be a function of the diameter of the disc used for each
single type of product and can be determined using the following equation:
Dynamic torque [Nm] = Tangential force [N] x ( radius of the disc [m] - 0.03 ) A-Dual brake
Dynamic torque [Nm] = Tangential force [N] x ( radius of the disc [m] - 0.033 ) D-Dual brake
Dynamic torque [Nm] = Tangential force [N] x ( radius of the disc [m] - 0.033 ) F-Dual brake
Dynamic torque [Nm] = Tangential force [N] x ( radius of the disc [m] - 0.062 ) G-Dual brake
An error in calculation will result in a braking torque different to the desired value and a
risk to aspects of safety.
The technical department of COREMO OCMEA can provide information, suggestions and
assistance for correct application and use of the product.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Page 7of 16
5.2. Brake lining wear
Since the dimensions and wear of the brake linings vary depending on the type of pincer the values for
the various brake models are shown in the table below.
TYPE
New lining thickness
Maximum total wear
A-DUAL
16 mm
16 mm
D-DUAL
11 mm
12 mm
F-DUAL
11 mm
12 mm
G-DUAL
8 mm
10 mm
Failure to respect the wear value indicated represents a risk to aspects of safety.
5.3. Special note
During braking kinetic energy is converted into heat caused by friction between the surfaces of
the brake linings and the brake disc. It is therefore fundamentally important to consider the
amount of heat that can be dissipated.
Ignoring the heat produced during braking affects brake lining wear and may jeopardize
the safety of the operators and the reliability of the product. Since a brake can be used
for many applications, it is advisable to contact the technical department of COREMO
OCMEA for further explanation in this regard.
6. Transport and storage
Personnel assigned to this work must wear suitable PPE such as gloves, safety footwear
and take any other precautions necessary before proceeding with transport, handling
and storage of the this part.
1. Transport: When handling it is important to bear in mind the dimensions and weight of each
single type of product as shown in the product drawing enclosed with this manual and in the
catalogue of the brake type in question.
2. Storage: When storing brakes it is important to bear in mind that a considerable weight is
concentrated in a small space. Personnel assigned to this work must wear suitable PPE
(safety footwear, gloves, etc.) in order to avoid the risk of injury.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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7. Installation
THE BRAKE MUST BE INSTALLED WITH THE MACHINE OFF.
Personnel assigned to this work must wear suitable PPE such as gloves, safety footwear and
take any other appropriate precautions to ensure adequate protection and avoid the risk of
injury.
Before installation, remove the spacer between the pads. To remove this spacer give pressure
to the brake, as shown in the relative paragraph, after connecting it to the air supply through a
1/2” gas nipple for the negative part and a 3/8” gas nipple for the positive part. Tighten the TE
safety screw on the rear of the thruster and subsequently release the pressure on the thruster
and disconnect the air inlet tube to proceed with the installation.
1. Mount the brake on a rigid flat surface of the machine or on a support capable of withstanding
a certain tangential force as shown in Table 1.
Brake model
Tangential force
A3-3N DUAL
13739 N at 6 bar
12067 N failsafe brakes
A1-2N DUAL
5302 N at 6 bar
6050 N failsafe brakes
D3-3N DUAL
12782 N at 6 bar
11440 N failsafe brakes
D1-2N DUAL
4928 N at 6 bar
5775 N failsafe brakes
F3-3N DUAL
12782 N at 6 bar
11440 N failsafe brakes
F1-2N DUAL
4928 N at 6 bar
5775 N failsafe brakes
G3-3N DUAL
12782 N at 6 bar
11440 N failsafe brakes
G1-2N DUAL
4928 N at 6 bar
5775 N failsafe brakes
Table 1
2. The brake can be mounted in any position as it is provided with a balancing system for the
levers and alignment of the brake shoes. Anchor the brake to the supporting base using 3 class
8.8 M12 screws and a tightening torque of 85 Nm or using 4 screws for brakes type F.
3. Adjust the screw located between the levers using a n.10 Allen key (Figure 1) until the weight
of the thruster is balanced, then lock the screws by tightening the nuts.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Figure 1
4. Adjust the play between the brake linings and the disc using the play adjuster and a n. 12 Allen
key, rotating in the appropriate direction (Figure 2); when a play of 1 mm has been obtained
between the disc and each brake lining, lock the adjuster in position screwing the nut (C61600)
all the way down using a n. 36 spanner and locking the adjuster (C61728) using a n. 5 Allen key.
Figure 2
5. Adjust the brake shoes using the grub screw C61723 (for calipers A), C61724 (for calipers D
and F) or C61559 (for calipers G) rotating it in the appropriate direction with a n. 3 Allen key
(for calipers A, D and F) or with a n. 4 Allen key (for calipers G); the friction surface of the
brake linings must be parallel to the surface of the disc (Figure 3).

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Pinze Tipo D - FPinze Tipo A Pinze Tipo G
Figure 3
6. Connect the thruster piston (1-2N DUAL or 3-3N DUAL) of the brake to the power line using
two gas fitting (one 1/2” gas fitting for the negative part and one 3/8” gas fitting for the
positive part) and a flexible hose of sufficient length to allow the thruster a wide range of
movement.
7. For the negative part of the DUAL thrusters the control pressure must not exceed 6 bar or drop
below 4.5 bar to ensure that the brakes are opened completely; for the positive part the
control pressure must not exceed 6 bar. The air must not be contaminated with oil or water,
therefore a 25 micron filter with automatic condensate discharge should be used.
8. Power up the thruster and substitute the safety screw TE with the silencer C61126 (Figure 4).
Figure 4
Do not apply the brake without the disc positioned between the brake linings; failure to
follow this rule could result in fingers being crushed and other dangers in addition to
damage to the brake itself.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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9. BEDDING-IN: The initial braking torque may be from 30% to 50% less than the rated value until
the brake lining adjusts to the disc.
8. Operation
8.1. Power supply of the safety component
The power supply pressure varies depending on the component as indicated in point 7 of
Chapter 7. The technical department of COREMO OCMEA can provide information, suggestions
and assistance for correct application and use of the brake.
The wrong power supply pressure will result in a tangential force different to the value
indicated in this manual; the braking torque of the safety component will therefore be
different to the value desired and represent a risk to safety aspects.
8.2. Improper use
The products considered here must be used exclusively as described in Chapter 5 of this
manual. Any other use is to be considered improper. The manufacturer declines all
responsibility for damage caused by erroneous or unreasonable use of the product.
Use of the product for purposes other than those stated in this manual may
compromise any aspect of safety.
9. Maintenance and cleaning
ALL TYPES OF WORK ON THE BRAKE MUST BE DONE WITH THE MACHINE OFF.
Staff assigned to this work must wear suitable PPE such as gloves and safety footwear and take
any further precautions necessary to ensure adequate protection and prevent injury. Failure to
follow the instructions given for maintenance and cleaning of the product may compromise
personal safety and cause damage to equipment and machinery.
High temperatures may be produced after braking on the surfaces of the disc brake and
the brake linings. Personnel must therefore wait for parts subject to overheating to cool
down and wear suitable protective gloves and PPE.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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9.1. Readjusting the play
1. Power up the thruster (only the negative part).
2. Loosen the nut C61600 and grub screw C61728.
3. Rotate the play adjuster clockwise until the optimal play of 1 mm is obtained between the
disc and each brake lining (see also point 4 of Chapter 7).
4. Lock the nut C61600 and the grub screw C61728.
5. Realign the brake shoes as described in point 5 of Chapter 7.
9.2. Changing the lining pads and cleaning the friction surfaces
1. Power up the thruster (only the negative part).
2. Replace the silencer with the safety screw.
3. Remove the seeger C61275.
4. Pull out the pin (C60906 for the caliper A, C61110 for the calipers D and F, C62056 for the
caliper G.
5. Remove the shoe (Z50162 for the caliper A, D71042 for the caliper A with double shoe,
Z50263 for the calipers D and F, Z50217 for the caliper G).
6. Remove the worn linings levering the metal part to overcome the force of the magnet
which holds it in its seat.
7. Check that the magnet is well housed in the shoe.
8. For brakes with double shoe remove the worn linings from the shoe by unscrewing the 4
screws C61526 with a n. 4 Allen key.
9. Remove any oil or grease from the surface of the disc using a non-pollutant detergent.
10. If the discs are contaminated only superficially it is better to clean them using fine emery
cloth
11. If the contamination of the linings is deep or at the maximum wear limit as indicated in
Chapter 5.2 and stated in the catalogue, replace them with new linings.
12. Remount the shoe following the instructions given from point 5 to point 3 in reverse order,
positioning the shoe alignment spring (C61903 for the type A pincer, C61968 for the type D
and F pincer, C62058 for the type G pincer) as shown in Figure 3.
13. Readjust the play between the disc and lining as described in Chapter 9.1.
14. Replace the safety screw with the silencer.
9.3. Changing the thruster springs
1. Power up the thruster (only the negative part). Unscrew the ring nuts and remove the
thruster from the brake. Cut off the pressure to the thruster and disconnect the power line.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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2. Remove the threaded bars which anchor the thruster body (E80799 for the thruster 3-3N
DUAL and E80829 for the thruster 1-2N DUAL), the bell and cover; unscrew slowly and
carefully so that the preloaded springs are released gradually.
Take the utmost care in these operations as the thrusters contain preloaded springs.
Therefore proceed gradually with the utmost care and attention until they are
completely released and no longer represent a threat to safety.
3. Remove the cover (Z50163 for the thruster 3-3N DUAL and Z50165 for the thruster 1-2N
DUAL) and the “negative” springs (replace all the springs including those which seem to be
in good condition).
4. Carefully pull out the internal “negative” thruster unit (Z50259 for thruster 3-3N DUAL and
Z50325 for thruster 1-2N DUAL).
5. Remove the bell (E80800 for the thruster 3-3N DUAL and E80830 for the thruster 1-2N
DUAL).
6. Pull out the internal “positive” thruster unit carefully (D71201 + C62064 for the thruster 3-
3N DUAL and Z50324 for the thruster 1-2N DUAL.
7. Remove the "positive" spring and replace it with a new one.
8. Follow the procedure given from point 6 to point 4 in reverse order.
9. Insert the new "negative” springs.
10. Rest the cover on the "negative" springs, align the anchoring holes and insert the threaded
bars complete with blind nuts and flat washers in their seats.
11. Remove the silencer from the cover, insert the safety screws and tighten, preloading the
springs until the cover comes into contact with the bell.
12. Tighten the threaded rods following a diagonal sequence, locking the unit in position with
the self-locking nuts.
13. Replace the safety screw with the silencer.
14. Reconnect the flexible hose and power up the thruster (only the negative part). Remount
the thruster on the brake anchoring it in with the two ring nuts.
15. Apply the brake a number of times to ensure that the internal thruster slides perfectly and
check for any air leaks.
9.4. Changing the brake shoe alignment springs
1. Power up the thruster (only the negative part) and replace the silencer with the safety
screw.
2. Remove the seeger rings C61275, then pull out the pin (C60906 for the caliper A, C61110
for the calipers D and F, C62056 for the caliper G) and remove the brake shoe (Z50162 for
the caliper A, D71042 for the caliper A with double shoes, Z50263 for the calipers D and F,
Z50217 for the caliper G).

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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3. Remove the shoe alignment spring (C61903 for the caliper A, C61968 for the calipers D and
F, C62058 for the caliper G) from its seat and replace it with a new one positioning it as
shown in Figure 3.
4. Remount the brake shoe following the procedure in point 2 in reverse.
5. Readjust the play between the disc and the lining as described in Chapter 9.1.
6. Substitute the safety screw with the silencer.
9.5. Changing the gaskets
1. Power up the thruster (only the negative part).
2. Unscrew the ring nuts and remove the thruster from the brake.
3. Cut off the pressure to the thruster and disconnect the power line.
4. Remove the threaded bars which anchor the thruster block (E80799 for the thruster 3-3N
DUAL and E80829 for the thruster 1-2N DUAL), the bell and the cover; slowly and carefully
unscrew allowing the preloaded springs to release gradually.
Take the utmost care in these operations as the thrusters contain preloaded springs.
Therefore proceed gradually with the utmost care and attention until they are
completely released and no longer represent a threat to safety.
5. Remove the cover (Z50163 for the thruster 3-3N DUAL and Z50165 for the thruster 1-2N
DUAL) and the "negative" springs.
6. Carefully pull out the internal “negative” thruster unit (Z50259 for the thruster 3-3N DUAL
and Z50325 for the thruster 1-2N DUAL.
7. Remove the bell (E80800 for the thruster 3-3N DUAL and E80830 for the thruster 1-2N
DUAL).
8. Carefully pull out the internal “positive” thruster unit (D71201 + C62064 for the thruster 3-
3N DUAL and Z50324 for the thruster 1-2N DUAL).
9. Remove the damaged gaskets (from the bell, from the internal “negative” thruster unit and
from the internal “positive” thruster unit) and replace them with new ones. It is advisable
to replace all the gaskets to avoid further down time of the machine. Before placing the
new gaskets in their seats, lubricate with lithium soap grease, mineral oil and solid
lubricants. Grease also the rods of the internal "negative" and "positive" thrusters before
remounting the thruster.
10. Remount following the instructions from point 8 to point 6 in reverse order.
11. Put back the "negative" springs in the pins of the internal "negative”thruster unit.
12. Rest the cover on the "negative" springs, align the anchoring holes and insert the threaded
bars complete with blind nuts and flat washers in their seats.
13. Remove the silencer, insert the safety screw and tighten preloading the springs until the
cover comes into contact on the bell.

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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14. Tighten the threaded rods following a diagonal sequence and lock the unit in position with
the self-locking nuts.
15. Replace the safety screw with the silencer.
16. Reconnect the flexible hose and power up the thruster (only the negative part).
17. Remount the thruster on the brake anchoring it in with the two ring nuts.
18. Apply the brake a number of times to ensure that the internal thruster slides perfectly and
check for any air leaks.
9.6. Periodic maintenance
All inspections must be done with the machine switched off.
Although the intervals between these inspections depend on the frequency of use of
the brake, they should be done every 3 months in any case so as not to compromise all
aspects of safety.
1. Check that the play between each lining pad and the friction disc does not exceed 1 mm. If
the play is too large, adjust it to the initial value as described in Chapter 9.1. When the wear
of each lining reaches the maximum value described in Chapter 5.2 replace the lining pads
as described in Chapter 9.2.
2. Check that the surfaces of the linings and the disc are not contaminated with grease, oil or
similar substances because these prevent the brake from working effectively.
3. Check that the anchoring screws of the brake and the brake units are correctly tightened.
4. Check the condition of the flexible hoses.
5. Apply the brake a number of times to check the condition of the gaskets, the operation of
the springs and correct sliding of the stem.
10. Spare parts list
To avoid costly down time we recommend keeping a stock of spare parts adequate for the number
of brakes as listed below:
Lining pads - caliper A: Cod. N° Z50020 [ST 10]
Cod. N° Z50021 [ST 11]
Cod. N° Z50028 [ST 10] with wear indicator
Cod. N° Z50029 [ST 11] with wear indicator
Cod. N° C61498[ [ST 10] double shoe
Cod. N° C61499 [ST 11] double shoe
Lining pads - caliper D and F: Cod. N° Z50054 [ST 10]
Cod. N° Z50055 [ST 11]

User and Maintenance Manual
“DUAL” caliper brake
Model A3-3N and A1-2N
Model D3-3N and D1-2N
Model F3-3N and F1-2N
Model G3-3N and G1-2N
Date: 2013/07/01
Revision: 1
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Cod. N° Z50117 [ST 10] with wear indicator
Cod. N° Z50118 [ST 11] with wear indicator
Lining pads - caliper G: Cod. N° Z50218 [ST 10]
Cod. N° Z50219 [ST 11]
Lever balance springs: Cod. N° C61951 caliper A [thickness 12,7 mm]
Cod. N° C61953 caliper A [thickness 25,4 mm]
Cod. N° C61951 calipers D and F [thickness 12,7 mm]
Cod. N° C61952 calipers D and F [thickness 25,4 mm]
Cod. N° C61953 calipers D and F [thickness 30/40 mm]
Cod. N° C61952 caliper G [thickness 25,4 mm]
Cod. N° C61953 caliper G [thickness 40 mm]
Shoe alignment springs: Cod. N° C61903 caliper A
Cod. N° C61968 caliper D and F
Cod. N° C62058 caliper G
"Negative" thruster springs: Cod. N° C61948 thruster 1-2N DUAL
Cod. N° C60986 - C61945 thruster 3-3N DUAL
"Positive" thruster springs: Cod. N° C60908 thruster 1-2N DUAL
Cod. N° C60918 thruster 3-3N DUAL
Gaskets: Cod. N° C62083 - C61129 - C61127 thruster 1-2N DUAL
Cod. N° C62132 - C61129 - C61128 thruster 3-3N DUAL
These spare parts must be kept in a place that is preferably dark, cool and far from substances that
could reduce their functionality.