CMC S28 User manual

Brand C.M.C.
Model S28
MAN.243 Rev.0
ORIGINAL
Mobile elevating work platform
Use and maintenance manual
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 1 of 87
0 Introduction   
hank you for the trust you have showed us buying a C.M.C. mobile
elevating work platform (MEWP). We are sure you will be pleased
with your choice.
0.1 Content of the manual 
This manual contains the technical specifications and the instructions for
transfer, use and maintenance of the MEWP. While drawing up this manual,
we took into consideration all the operations that are part of a normal use
and a regular maintenance of the machine. So, for a correct and optimum
use, you must follow the described instructions carefully.
This manual has been drawn up in order to:
❑Show the technical features of the machine;
❑Describe the control stations and their commands;
❑Provide with the instructions for the transport, placement and use of
the machine;
❑Describe the safety devices;
❑Point out the potential risks and/or possible dangerous situations;
❑Provide with the necessary instructions for the ordinary maintenance
operations;
❑Provide with the instructions for the filling of the check register.
THE USE AND MAINTENANCE MANUAL IS CONSIDERABLE AS
A PART OF THE MACHINE. In case of sale of the MEWP, please
give this manual to the new owner.
LEGEND OF SYMBOLS USED IN THIS MANUAL:
(CAUTION) = it warns the user about the risk of serious damages
to people or to part of the equipment or the vehicle, if
youdo not obeythesafetyregulations.
(WARNING) = it notifies the possibility of minor injuries to people
or littledamagestothe platformorvehicleparts.
(FORBIDDEN) = prohibitionsignal.
➔ (OBLIGATION) = obligation signal.
(CAUTION) =it warns the user about the risk of environmental
pollution.
* (OPTIONAL) =it indicates anoptional outfit.
(IMPORTANT NOTE) = indicates information and suggestions useful to
workwiththeMEWP.
➔This manual is addressed to:
▪users: operators, ground assistants, guard staff, safety manager,
service manager;
▪manufacturers, dealers, owners, lessors or lessee, brokers.
T
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 2 of 87
0.2 Disclaimer      
C.M.C. declines all responsibility in case of partial or total non-observance of
the following instructions
➔Before any operation with the machine, the user is obliged to read
carefully the text of this manual, with reference to sections relative to
specific work activity to perform.
➔The use of the machine must be entrusted only to trained and
authorized staff. This manual cannot replace in any way a suitable
experience that the staff in charge must have gained previously on
similar machines or that they will able to get on this machine, under
the guidance of an already trained staff.
➔The user must work within the functional limits of the machine and
perform a constant and diligent maintenance, using only original
spare parts indicated by C.M.C.
➔The operator shall carefully know the safety standards foreseen by
national and international legislations and apply them during all
operations with the MEWP.
The guarantee of proper functioning and full compliance of
the machine with the intended service is strictly dependent on
the correct application of all the instructions contained in this
manual.
The non-compliance with the previous items automatically
invalidates the warranty.
0.3 Where and how to store the manual 
➔The manual must be stored and kept in the best possible
condition (away from sunlight), in a suitable place, for the
purpose of always being available for consultation.
➔This manual (or its copy) must always be on the machine (in a
case near the turret) for an immediate consultation by the operator
during working operations.
➔Another copy shall be hold by the basket operator during the
working period inside the internal documents case.
➔In case of loss or deterioration, the replacement documentation
must be requested to C.M.C. s.r.l, citing the code of this manual.
0.4 Legislative references 
This manual has been drawn up according to the following
national and international laws and directives:
Directive 2006/42/CE
EN 280:2015
EN 13001-3-1
Directive 2014/35/UE
Directive 2000/14/CE
EN ISO 12100
ISO 13849-1-2
ISO 3864
EN 60068-2-64
ISO 13850
ISO 4302
EN 60204-1
ISO 13854
ISO 4305
EN 60204-32
ANSI/SAIA A92.20-2020
ANSI/SAIA A92.24-2018
IEC 60529
ANSI/SAIA A92.22-2020
ANSI Z359.1
EN 62061
CAN/CSA B354.6 (2017)
CAN/CSA B354.7 (2017)
ISO 13857
AS/NZS 1418.10-2011
AS NZS 1418.10-
2011_A1-2017
ISO 20381
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0.5 Changes and integrations 
The information and legislative references present in this manual are those
in force when the machine has been placed on the market.
Due to the constant and continuous improvement of their product by the
manufacturers, the supplied machine could present some technical
specifications different from those described on this manual. Any change will
be however accompanied with specific documents attached explaining
functional characteristics. In case of differences in comparison with the basic
contents of this manual, the user is kindly asked to contact C.M.C. to receive
supplementary technical specifications.
As this manual includes both current and optional components, you could
find information not applicable to your machine.
C.M.C. reserves the right to update its production and its instruction
manuals (without prior notice) according to the development of the
technique, to the acquisition of new experiences and/or the change of law
provisions, without being anyway obliged to intervene on the previously sold
machines and on their manuals.
No part of this publication can be translated, modified or reproduced (even
partially) without the expressed authorization of C.M.C. s.r.l.
C.M.C. reserves the right to modify - totally or partially - any data or
specification of this publication (without prior notice).
Data and references indicated in this manual are those in force at the time of
printing.
Year 2020
C.M.C. s.r.l.
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 4 of 87
1 Specifications 
1.1 Technical sheet  
PERFORMANCE
Max. working height
27,90 m
91.54 ft
Min. working height
-6,70 m
21.98 ft
Max. working outreach (with 80 kg)
14,00 m
45.93 ft
Max. working outreach (with 230 kg)
11,50 m
37.73 ft
Max. load on the basket
230 kg
507 lb
Jib movement
90°
Turret rotation
+/-200° (tot. 400° continuous)
Basket rotation
+/-90°
Max. slope to stabilize
32° / 62%
Max. ramp attack slope with crawlers
widened (front/rear)
13°-17° / 23%-31%
Max. ramp attack slope with crawlers
closed (front/rear)
7°-10° / 12%-18%
Max. slope to travel
19° / 34%
Travel speed
0,5 - 2,4 km/h
0.3 - 1.5 mph
DIMENSIONS
Basket height
1,10 m
3.61 ft
Basket width
0,70/0,60 m
2.30/1.97 ft
Basket length
1,70/1,20/0,80 m
5.58/3.94/2.62 ft
Total length with basket
6,80 m
22.31 ft
Length without basket
6,10 m
20.01 ft
Height in driving position
(with crawlers closed/widened)
1,99/2,19 m
6.54/7.19 ft
Total width (without basket)
0,90 m
2.95 ft
Clearance from the ground
in transport configuration
(with crawlers closed/widened)
0,17/0,32 m
0.56/1.05 ft
Clearance under crawlers
with machine stabilized
1,05 m
3.44 ft
Tracks (L x w)
1,75 x 0,25 m
5.74 x 0.82 ft
Width tracks adjustment
0,89/1,40 m
2.92 / 4.59 ft
Height tracks adjustment
0,18/0,33 m
0.59/1.08 ft
Max. longitudinal stabilization
6,67 m
21.88 ft
Max. cross stabilization
4,43 m
14.53 ft
Min. longitudinal stabilization
5,22 m
17.13 ft
Min. cross stabilization
2,67 m
8.76 ft
Intermediate stabilization
3,63 m
11.91 ft
Outriggers plate Ø
0,24 m
0.79 ft
WEIGHT AND PRESSURES
Total weight (standard equipment)
4123 kg
9091 lb
(R) Max. pressure on the foot
5,84 kg/cm²
(57,23 N/cm²)
83.06 lb/in2
(S) Max. pressure on the track
0,28 kg/cm²
(2,72 N/cm²)
3.98 lb/in2
(T) Max. pressure in travel
772 kg/m²
(7,57 KN/m²)
158 lb/ft2
(U) Max. pressure in work
(4 feet opened)
146 kg/m²
(1,43 KN/m²)
29.90 lb/ft2
(V) Max. pressure in work
(4 feet closed)
213 kg/m²
(2,09 KN/m²)
43.63 lb/ft2
(Z) Max. pressure in work
(2 feet closed + 2 feet opened)
172 kg/m²
(1,69 KN/m²)
35.23 lb/ft2
POWER
Standard hydraulic feed
1) Kubota D902-E4B diesel, 16.1 kW (21.6
HP), 3200 rpm
*Optional feeds
2) Electric engine
230/110/120 V
380/230/240-460 V
3) Motor G0901306, 9 kW, 48 V, with lithium
batteries 200 Ah
4) Hybrid motor (diesel + lithium batteries)
Fuel tank capacity
30 l
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 5 of 87
Max values (speed/force) allowed according to USA/EU standards
Max allowed lifting and descending speed of
the MEWP
0,4 m/s (1.31 ft/s)
Max allowed boom extension and withdrawal
speed
0,4 m/s (1.31 ft/s)
Max allowed rotation speed
0,7 m/s (2.3 ft/s)
Max allowed manual force in the basket with 1
operator
400 N
Tightening torque
Bolts of the bearing
M16 cl 10.9
28 daNm
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 6 of 87
1.2 Identification plate    
On the turret, there is a plate with (engraved) all the MEWP identification
data:
Picture 1: identification plate.
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 7 of 87
1.3 CE certification 
C.M.C. s.r.l. states under its own responsibility that S28was designed and
produced in compliance with national and European standards, and that the
machine is identical to the model submitted to control and test for the “CE
certification” by the Notified Institute nr. 1878 - VERICERT s.r.l. - via L.
Masotti, 5 - 48124 Fornace Zarattini (RA) - Italy.
A copy of the CE Certificate is attached to the manual.
1.4 TÜV certification 
C.M.C. s.r.l. states under its own responsibility that S28 was designed and
produced in compliance with US standards ANSI/SAIA A92.20:2018 and
that the machine is identical to the model submitted to control and test for
the “TÜV certification”by TÜV SÜD America Inc.
TÜV SUD America Inc. is an OSHA recognized NRTL and a Standards
Council of Canada accredited certification body.
1.5 Classification 
The mobile elevating work platform (MEWP) S28belongs to group B: the
vertical projection of the area center of the MEWP in different platform
configurations specified by the manufacturer can be outside the tipping lines
(EN 280 par. 1.4 - ANSI/SAIA A92.20 par. 3).
As for the displacement, it belongs to type 1: travelling is only allowed with
the MEWP in its transport configuration or in the stowed position (EN 280
par. 1.4 - ANSI/SAIA A92.20 par. 3).
1.6 Loading cycles 
The machine is expected to last for 40.000 loading cycles
1
(i.e. 10 years, for
40 weeks per year, for 20 hours per week, for 5 loading cycles per hour).
Within this term of time, the machine must undergo at least 2 (two)
deep checks (structural, mechanical, electric, elements, etc.), in case of
particularly heavy uses (frequent use at the performance limit, particularly
unfavorable environmental conditions such as steel plants, paper mills and
so on) it is better to increase checks. Anyway, it is a good rule to have
the state of the machine checked by the manufacturer factory or by an
authorized workshop, at least every 1500 - 2000 hours of work or once
per year.
1
Loading cycle: a cycle starts from the access position, continues performing the
work and finishes returning to the access position.
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1.7 Working diagram 
Picture 2a: work diagram
(valid only in the working area set by the outriggers placement).
Picture 2b: work areas.
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2 Description and purpose
2.1 Machine definition 
The machine is called S28 and it is a mobile elevating work platform
(MEWP):
•machine/device intended for moving persons, tools and material to
working positions, consisting of at least a work platform with
controls, an extending structure and a chassis (ANSI/SAIA 92.20
par. 3);
•mobile machine intended to move persons to working positions,
where they are carrying out work from the work platform, with the
intention that persons are getting on and off the MEWP only at
access positions at ground level or on the chassis and which
consists as a minimum of a work platform with controls, an
extending structure and a chassis (EN 280 par. 3.1).
It is forbidden to use the MEWP with methods and/or conditions
other than those specified and approved by the manufacturer.
2.2 Machine purpose 
The MEWP S28is a machine which enables the operators to reach the
working place when this is high positioned.
The machine has been designed for an essentially vertical use. It must
be travelled only when it is totally folded in the transport position.
➔The use of the machine is allowed only to professional staff,
properly trained and specialized.
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2.3 Description of the main components 
Picture 3: MEWP main components.
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2.3.1 Frame
The frame 1 (Picture 3) is a structure in quality steel, able to equally divide the
equipment’s weight when the MEWP is in transport position. The frame has 4
oil-pressure jack beams for stabilization [2 front stabilizer cylinders 2 (Picture
3), 2 rear stabilizer cylinders 3 (Picture 3)]. The basis for the bearing is placed
on the frame 4 (Picture 3). It enables the swinging of the equipment through
the turn-table.
2.3.2 Turret
The turret 5(Picture 3), in quality steel, is secured to the bushing (bearing). A
hydraulic engine, with brake normally closed, constrained to the turret, allows
the rotation of the superstructure.
2.3.3 First telescopic boom group
The first telescopic boom group 6(Picture 3) is composed by three elements:
a fixed boom and two extendable booms.
The extension (or withdrawal) of the telescopic boom is given by operating the
“telescopic boom extension cylinder”.
The movement of the boom (lifting and lowering) is given by the lifting
hydraulic cylinder. Such cylinder is secured to the turret (cylinder side) and to
the fixed boom (piston side) and is supplied with safety valves.
2.3.4 Second telescopic boom group
The second telescopic boom group 8(Picture 3) is hinged to the first
telescopic boom by a rod 7(Picture 3). The telescopic boom is composed by
three elements: one fixed boom hinged to the rod and two extendable booms.
The extension (or withdrawal) of the telescopic boom is given by operating the
“telescopic boom extension cylinder”.
The lifting (or lowering) of the telescopic boom is given by operating the “lifting
cylinder of second telescopic boom group”.
2.3.5 Jib
At the end of the second telescopic boom is hinged a boom named Jib 10
(Picture 3). The lifting or descent of the Jib is done by operating the “Jib lifting
cylinder”.
2.3.6 Basket
the basket 11 (Picture 3) is in aluminum tubulars and has a lateral opening to
allow the entrance of the operators. The lateral opening is automatically
shuttered and built to avoid accidental openings. The basket has attacks for
safety belts, a guardrail 1,1 m high from the basket floor, an intermediate
guardrail and a foot protecting band along all sides of the platform. The floor is
in antiskid and auto-draining aluminum. The basket is connected to a support
9 (Picture 3) through which it is coupled with the jib.
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 12 of 87
3 Control stations 
3.1 Machine switching on/off station 
Picture 4: engine switch on/off station.
In this station (Picture 4) allocated on the right side of the frame, you can see:
•the AM key: through it, it is possible to turn on the electric system and
start the endothermic engine;
•the green light 5indicating system power supply: it is on when the AM
key is in position 1;
•the red light 4which signals low pressure to the engine oil;
•the red light 3which monitors coolant level;
•the orange light 2indicating the spark plugs working;
•the red light 1which signals an alternator failure;
•the hour counter.
3.1.1 Ignition of the endothermic engine
In order to start the endothermic engine, turn the key all the way to the right
up to the symbol .
Before starting the engine, especially if the MEWP is used in workplaces with
low atmospheric temperatures, it is advisable to heat the spark plugs of the
machine motor while keeping the key on the symbol for a few seconds:
this will cause the corresponding orange light 2(Picture 4) to turn on.
Picture 5: heating phase of the engine spark plugs.
The ignition of the endothermic engine can also be carried out with the help of
the radio control or of the console in the basket.
Using the radio control:
•turn the key to position 1;
•connect the radio control (link procedure in par. 3.2.2),
•move the lever in the Picture upwards, present on the left side of the
radio control under the joystick J1 (Picture 7);
•in this case, the green light 5(Picture 4) will light up both on the key
station and on the radio control, to signal the correct power supply of
the machine.
AM
5
4
3
2
1
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 13 of 87
Otherwise, using the console in the basket (already wired to the machine):
•turn the key to position 1;
•press the endothermic engine start button 9(Picture 11)
•also, in this case, the green light 5(Picture 4) will light up both at the
key station and on the console, to signal the correct power supply of the
machine.
Picture 6: key position for ignition of endothermic engine
from radio control or from basket console.
Picture 7: power on/off lever on the radio control.
To switch off the endothermic engine, you can alternatively:
•turn the key all the way to the left on position 0;
•lift the lever in Picture 7, if the radio control has been used;
•press the endothermic engine start/stop button 9again (Picture 11), if
you are at the control station in the basket;
•press, in emergency situations, one of the emergency buttons on the
machine (par. 4.5.1).
3.1.2 Switching on/off the electric motor (*optional)
If you choose to use the electric motor (*optional):
•connect the 110/120/230 V socket (Picture 8) to the nearest electrical
source;
Picture 8a: socket connection.
•from the radio control, start the engine by pushing the lever in Picture
7 downwards or alternatively from the console in the basket press the
start button of the electric motor 10 (Picture 11);
•the power supply is signaled by the lighting up of the green led 5both
on the engine ignition station and on the control stations.
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 14 of 87
To switch off the electric motor, it will be enough to alternatively:
•turn the key all the way to the left on position 0;
•lower the lever mentioned above of the radio control;
•re-press the on/off button 10 on the console in the basket;
•press, in emergency situations, one of the emergency buttons
provided on the machine (par. 4.5.1).
3.1.3 Other power supplies *optional
The machine can be supplied on request completely with a 48 V electric motor
powered by 200 Ah lithium batteries or with a hybrid feed.
It is not possible to have the 48 V electric motor and the
110/120/230 V one activated on the machine at the same time.
It is not possible to turn on both the endothermic engine and the
electric motor at the same time.
The start and stop of the 48 V electric motor will be the same shown above for
110/120/230 V electric motor.
To recharge the batteries:
1. couple the socket (power line) to the plug on the machine and lift the
button provided on the machine's thermal magnetic panel;
2. the batteries will be charging and, if the electric system is ON, the
progress of the charging process will be shown on both the control
station display and the appropriate leds of the box in the basket.
When the state of batteries charge, during the use, reaches the
lowest level (under 10%), all work maneuvers will be interrupted,
and it will only be possible to close the machine again.
It is absolutely forbidden to direct high-pressure jets of water onto
the support containing the battery pack. High water pressure
could generate serious and irreversible problems in the operation
of the machine.
As optional*, a voltage selector can be mounted on the MEWP to supply a
different electric power compared to that of the auxiliary electric engine
provided, thanks to a transformer on the chassis.
Picture 8b: transformer box with voltage selector.
3.2 Platform control stations 
The main standard platform control station is:
•AUTEC radio/wired remote control (Picture 13).
The *optional platform control stations are:
•MOBA console (Picture 9) positioned on the basket;
•second AUTEC wired remote control positioned on the basket.
It is not possible to use two different control station at the same
time.
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 15 of 87
The system will select as actual control station the first one that will be used
by the operator. Once the AUTEC radio control station is linked, it will become
the actual control station, and in order to select a different control station you
need to turn off and back on the system by the ignition key or any of the
emergency buttons on the machine (except the one on AUTEC radio remote
control).
3.2.1 Platform control station on the basket (*optional)
Picture 9: platform control (exercise) station.
The platform MOBA (*optional) control station (Picture 9) on the basket has:
•two joysticks J1 and J2 (dead man commands) for movement
operations;
•a red mushroom-shaped emergency button EB (on the right side
of the control station): it stops the machine de-energizing the electrical
circuits;
The emergency button has an auto-detent mechanical locking
system; therefore, it is necessary to unlock the button turning it
clockwise to reset its operability.
•a series of control buttons/lights described in the following table.
Picture 10: left side of basket console.
J1
EB
J2
2
4
5
8
3
1
6
7
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Picture 11: central side of basket console.
Picture 12: right side of basket console.
The basket control station (*optional) allows the following maneuvers:
Button
nr.
Operation description
1
Opening of the left track / clockwise rotation of turret /
internal leveling of basket
2
Return and lowering of boom 1 / backward movement of
the left track
3
Lifting and extension of boom 1 / forward movement of
the left track
4
Closing of the left track / counterclockwise rotation of
turret / external leveling of basket
5
MEWP power supply indicator
6
Pre-alarm light: maximum performance almost reached
7
Alarm light when reaching the maximum performance
8
Alarm light when reaching the load limit
9
Endothermic engine switching on/off button
10
Electric engine (*optional) switching on/off button
11
Automatic destabilization button from basket
12
Speed selection button among two predefined levels of
increase: it has a flashing light in “hare” mode and a fixed one
in “double hare” mode.
13
Automatic stabilization button from basket
14
Button for:
1. lifting/lowering jib
2. basket rotation
15
On/off tracks movement button
16
Deadman button for basket leveling operations, to be kept
pressed during movement towards left/right of the
joystick J1
17
"Home function" button
18
7
25
19
24
20
22
23
21
10
11
12
13
14
15
16
17
9
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18
Closing of the right track / return of boom 2 / clockwise
rotation of the basket
19
Stabilization consent light
20
Aerial part consent light
21
Forward movement of the right track / lifting of boom 2 /
lifting of jib
22
Not used
23
Error/failure indicator light
24
Opening of the right track / extension of boom 2 /
counterclockwise rotation of the basket
25
Backward movement of the right track / lowering of boom
2 / lowering of jib
3.2.2 Platform radio control station
The main standard radio control station AUTEC is activated only by
carrying out the connection procedure described below (radio control
activation directly excludes the basket control station).
Picture 13: platform radio control station.
Radio control link procedure:
1. To connect the radio control, press the green Start/Link button SL
(Picture 14) down on the left side.
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 18 of 87
Picture 14: start/link button on radio control.
2. If the radio control is not correctly connected to the machine, the
message in Picture 15 will appear on the display; in addition, the
green led on the underside of the display flashes intermittently and a
buzzer on the electric box emits an intermittent acoustic signal.
Picture 15: no link message on radio control display.
3. Press the Start/Link button again: when the connection is complete, the
buzzer stops and the green led starts to light up at the rate of two flashes
interspersed with a pause.
Picture 16: AUTEC radio control marking.
The AUTEC radio control has the following commands:
Command
nr.
Operation description
EB
Red mushroom-shaped emergency button that stops the
machine
J1
Forward or backward movement of the left track / internal
or external leveling of the basket / clockwise or
counterclockwise rotation of the basket
EB
J3
J4
J6
J1
J2
1
J5
1
9
8
10
7
11
12
SL
CK
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MAN.243 Rev.0 ENG - Use and maintenance manual S28 page 19 of 87
J2
Opening and closing of the left track / return and
extension of boom 2
J3
Lifting and lowering of boom 2
J4
Return and lowering of boom 1 / lifting and extension of
boom 1
J5
Opening and closing of the right track / clockwise or
counterclockwise rotation of turret
J6
Forward or backward movement of the right track / lifting
and lowering of jib
7
Deadman lever for basket leveling operations, to be kept
shifted upward during movement towards up or down of the
joystick J1
8
Switch on/off lever: upward for endothermic engine and
downward for electric motor (*optional).
9
Roll-over control lever: upward to move front outriggers and
downward to move rear outriggers.
10
Speed selector: from minimum “turtle” speed to maximum
“double hare” speed.
11
Automatic stabilization/destabilization lever
12
"Home function" button
P
“Parking”button
The emergency button has an auto-detent mechanical locking
system; therefore, it is necessary to unlock the button turning it
clockwise to reset its operability.
The functions contained on the radio control are the same as
those of the platform (exercise) control station in Picture 9 and
they are indicated by the same symbols described above.
If the battery of the AUTEC radio control is low, it could become a wired
remote control, by connecting the appropriate plug on its right side to the
machine attack (Picture 17).
Picture 17: radio control connection.
A very important device of the radio control is the blue coding key CK on its
left side (Picture 14), which puts the console in communication with the
machine control unit. Be careful not to lose it.
3.2.2.1 AUTEC radio control display
Moreover, this station has a color display (Picture 18) which allows to
visualize all the function parameters of the machine.
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