FOLLOW THESE INSTRUCTIONS CAREFULLY IN ORDER TO PRESERVE THE EFFICIENCY AND
RELIABILITY OF ALL VEHICLE COMPONENTS.
OUR PRODUCTS ARE SUBJECT TO CONSTANT DEVELOPMENT; AS A RESULT CERTAIN PARTS
OF THIS PUBLICATION MAY NOT BE FULLY UP TO DATE.
PRODUCED BY
SATIZ S.P.A.
EDITORIA TECNICA
PUBBLICAZIONI TECNICHE C/O IVECO
LUNGO STURA LAZIO 49
10156
TORINO ITALY
PUBLICATION EDITED BY
IVECO ENGINEERING
PUBLICATION NR. 603.42.371 -7THED.
PRINTED IN ITALY - 02.2002
Foreword
For the technical information concerning modification of the vehicle, application of bodies and re-
quests for technical documentation, please contact the relevant IVECO Commercial Sector.
These instructions refer to the vehiclesof the EuroCargo, EuroTech, EuroStar and EuroTrakker ranges
that are currently in production; for vehicles in these ranges that have gone out of production, please
refer to the instructions given in previous editions.
For other current models and ones no longer manufactured by IVECO, refer to the instructions contained in the booklet N
R. 603. 42.141.
Warning
The following symbols are widely used in this manual and the indications to which they refer should
be carefully followed.
Danger to people: failure to fully observe these precautions can involve serious danger
for personal safety.
Warning/Precautions: failure to fully observe these precautions involves the risk of serious damage to the vehicle (with resulting loss of warranty conditions) and/or persons.
Gas, service operations / precautions for gas-fuelled vehicles5-20
Gas-fuelled vehicles, service operations / precautions5-20
General specifications1-5
Grinding, precautions2-6
Hazard goods transport2-104
Interchangeable parts, outfits3-22
Interface with electric / electronic on-board systems with Cursor engine version5-26
Interface with electric / electronic on-board systems with EuroMover engine version5-54
Interface with electric / electronic on-board systems with TECTOR engine version5-67
IVECO approval, necessity2-5; 2-15
IVECO approval, request1-5
Alphabetical index to subjects
III
IVECO offices to be contacted1-5
Legal requirements1-19
Limits on modifications1-7
Load permitted variations2-75; 2-78
Material, chassis2-10
Minimum load on front axle, limits1-15
Mudguard flap2-108
Optimized drive5-17
Painting2-7
Plastic brake piping2-66
Positioning of electronic control units on vehicles5-6
Power takeoffs from engine4-16
Power takeoffs from gearbox4-7
Power takeoffs from torque restorer4-15
Power takeoffs from transmission4-15
Power takeoffs4-5
Quality system management1-20
Rear axle air suspension load check with ECAS electronic device5-17
Rear crossmember, lowered position2-26
Rear crossmember, reinforcements2-42
Rear mudguards and wheelboxes2-107
Rear overhang modification2-22
Recycling1-20
Repositioning equipment2-102
Retarder installation2-75; 2-105
Self-supporting superstructures3-11
Semitrailer tractors3-31, 3-32
Side guards2-108
Side marker lamps, arrangement2-97
Side member cutting, precautions and procedure2-6; 2-11; 2-16
Slide-and-dump containers3-27
Snowplough3-68
Special / fire-fighting / municipal vehicles3-68
Speed limiter, precautions2-75
IV
Alphabetical index to subjects
Spoiler, fitting2-61; 2-62
Stabilizer bars, use1-14
Steering, influence following wheelbase modifications2-13
Subframe material3-5
Subframe sections, cement mixers3-29
Subframe sections, centre-axle trailers2-30
Subframe sections, crane3-50; 3-52; 3 -55
Subframe sections, tippers3 -25; 3 -26; 3-27
Subframe sections, fifth wheels3-43
Subframe sections, b ox-bodies3-19
Subframe sections, tail lifts3-62
Subframe sections, tanks3-45
Subframe, connection to chassis3-12
Subframe, , crossmembers3-10
Subframe, construction3-5
Subframe, material3-5
Subframe, profile3-7
Subframe, stiffening3-10
Superstructure centre of gravity and positioning payload1-9; 1-13
Superstructures3-5
Supplementary axles, installation2-45
Supplementary heater system2-59; 2-75
Suspensions, modifications2-55
Tail lifts, installation3-58
Tanks, installation3-44
Tipper installation3-23
Top-sleeper, assembling2-62
Towable weight increase2-25
Towing hook, application2-24
Towing device installation2-24
Tractor and semitrailer combination3-32
Tradenames and logos1-7
Transmission modifications2-17
Transmission, drive line modifications2-17
Transport of indivisible material3-44
Tyres, replacement2-64
Under run-bar, modifications2-106
Alphabetical index to subjects
V
Vans, manufacture3-23
Vehicle component functions and maintenance1-6; 1-18
Vehicle delivery1-21
Vehicle maintenance, accessibility1-18
Vehicle identification1-8
Vertical engine exhaust2-57
Warranty, issue1-21
Warranty, undertaking1-6; 2-75
Weight variations1-15
Weights, compliance with permitted values1-9; 1-15
Weights, permitted variations1-15
Welding, execution2-10
Welding, precautions2-6; 2-10
Welding, prohibitions2-5
Wheelbase modification2-13
Wheelbase, permitted increase2-13
Winches, installation3-69
VI
Alphabetical index to subjects
I.GENERAL
SPECIFICATIONS
General specifications
1-1
1-2
General specifications
Index
1.General Specifications
1.1General Specifications1-5
1.2Dimensions and Weights1-9
1.2.1General Specifications1-9
1.2.2Determining the Centre of Gravity of the Body and Payload1-9
1.2.3Observing the Permitted Weights1-15
1.3Instructions for the Correct Functioning of the Parts of the Vehicle
and Accessibility for Maintenance1-18
1.4Legal Provisions and Prevention of Accidents1-19
1.5Choice of material to use:
Ecology - Recycling1-20
1.6Quality System management1-20
1.7Vehicle delivery1-21
General specifications
1-3
1-4
General specifications
1.1General Specifications
Purpose
The purpose of these instructions is to permit modifications and/or fitting genuine IVECO parts while
safeguarding the operation, safet y and reliabilit y of the vehicle and its components.
The modifications and fittings made in compliance with the following instructions, except for the contents of
point 2.1.1, require no specific IVECO approval.
All modifications and fittings not covered in these instructions are to be approved beforehand by IVECO.
IVECO shall not be held liable for any modifications or fittings where approval has not been requested or, if
it has, where approval has been rejected or not given.
Departments to be Contacted and Documentation to be Submitted
Whenever equipment has to be constructed and this is not taken into consideration by the specifications
contained in this manual, the responsible Departments, which can be contacted through the Sales Management
of the Company, will provide the pertinent information. In these cases contact the IVECO Office in yourzone.
When contacting these bodies two copies of the following documentation must be submitted:
a) Drawing of the vehicle including dimensions of the body or of the modified components or of the new
equipment.
b) A break down of the weights, with indications regarding the centre of gravity where necessary.
c) Description of the auxiliary frame, dimensions, fastenings to the chassis of the vehicle.
d) Distribution of the forces and moments acting on the vehicle as a result of the equipment (cranes, cement
mixers, hoists, concrete pumps etc.).
Reference must be made on the drawings themselves to all the points which differ from these specifications.
Furthermore, the use of the vehicle and the conditions under which it is to be used must be briefly described.
IVECO Technical Documentation Available on Computer
The specific IVECO - THB web site contains technical documentation on the product concerning:
-Instructions for bodybuilders;
-Technical descriptions;
-Bodybuilder drawings
-Chassis, transmission, p.t.o. diagrams;
-Type-approval data.
Access information can be requested directly from the above-mentioned IVECO office.
This same office will be able to provide you with CD-ROMs with the collection of chassis cab diagrams for the
various product ranges in CAD - IGS and/or DXF format.
General specifications
1-5
Authorization and Liabilities
The authorizations issued by IVECO concern solely the technical feasibility of the modification
and/or fitting to be made on a genuine IVECO vehicle.
The bodybuilder is responsible for the:
-project of the modification or fitting;
-choice and features of the products used;
-workmanship of the modification or fitting;
-compliance of the project and its implementation with all the instructions provided by
IVECO;
-compliance of the project and its implementation with all the current regulations in the
country where the vehicle is registered;
-operation, safety, reliability and generally the good handling of the vehicle as well as the
effects the modifications and fitting may have on the performance and specifications of the
vehicle.
Guarantees
The bodybuilder/chassis converter who has built the body or who has modified the chassis must guarantee
that the work was undertaken in a professional manner in full compliance with the specifications contained in
this manual. IVECO reserves the right to declare void its own warranties for the vehicles where:
-These specifications have not been adhered to or where unauthorised equipment was installed, or
unauthorised modifications were carried out.
-The chassis was used in a way which is not suitable for the equipment or for the intended purpose of the
vehicle.
-The specifications, standards or instructions issued by the Manufacturer for the flawless execution of the
operations have not be heeded.
-Original spare parts or components which the Manufacturer has made available for specific interventions
were not used.
Maintaining Proper Operation of Parts and Vehicle
It is clearly understood that for all authorised modification and applications, the proper
functioning of the various parts of the vehicle, the safety of operation and use of the various
elements of the vehicle, in compliance with the national and international regulations (EEC
Standards) and to the norms pertaining to the prevention of accidents must be guaranteed.
1-6
General specifications
Limits on Modifications
To ensure driving safety and good vehicle operation, the following assemblies in general must not be
modified:
-Axles
-Steering system
-Brakes
-Suspension (springs, brackets, anchor bar)
-Chassis
-Power unit
-Coupling devices (hooks, fifth wheels)
-Cab supports, locking and tilting devices
-Electrical system.
Modifications to the above assemblies, where included in these directives, may only be carried out after
approval has been received from IVECO.
Trademarks and Logos
Trademarks, nameplates and denominations must not be modified or displaced in relation to the original
design. The appearance of the vehicle must not be changed or modified.
The application of trademarks tied to the transformation or trim levels must be authorised by IVECO. They
must not be applied near to the IVECO tradenames or logos.
IVECO reserves the right to withdraw the tradenames and logos if the fitting or conversion fails to conform
with requirements. The bodybuilder accepts all responsibility for the entire vehicle.
Instructions for Additional Units
The bodybuilder shall, upon delivering the vehicle, supply the necessary service and maintenance
instructions for additional installed units.
General specifications
1-7
Choosing the Chassis
The correct choice of chassis, in the appropriate version, is very important if the o utcome of the
modification is to be successful.
Before proceeding with the modifications, ensure that the vehicle supplied corresponds to the one requested
by checking information given on the order, and in the technical documentation provided by the Manufacturer.
Vehicles Identification
Two examples concerning the identification of the Euro Range of vehicles are given below together with
the meaning of the relevant initials:
Cab RangeModelPowerVersion
CHASSIS
CAB VEHICLES
TRACTOR
EXTERNAL NAMEPLATE ON VEHICLE
LD190/FPE25
MP 400/PE83XT
ML
MH
MP
LD
FF
M
CC
CAB RANGE
ML = Medium light
MH= Medium Heavy
MP = Multipurpose
LD = Long distance
FF = Fire fighting
M = Military
CC = Chassis cowl
GVW-Vehicles with cab
GVC - Tractors for
semitrailers (:10 in ton)
EUROEngine power
190 E25
Configuration
C
D
H
K
T
R
V
X
(x 10 in HP)
VERSION
C=Combi
D = Double cab
H = Heavy duty
HM = Heavy mission
K = Kipper
T = Tractor for semitrailers
R = Drawbar
V=Van
X = 6x2COnlytractors
Y = 6x2PRoad
Z = 6x4
W = All wheel drive
Y
Z
W
Gearbox
Suspension
/TN
/P
/PT
/PS
/FP
/FT
/FS
/E
1-8
SUSPENSION
/TN = Only for 6 x 2P vehicles, mechanical rear suspension with fixed 3rd axle (twin wheels)
/P = 4x2, 6x4, 6x2P vehicles, rear air suspension. 6x2P with fi xed 3rd axle, single wheels
/PT = Only for 6x2P rear air suspension with fixed 3rd axle, controlled steering
/PS = Only for 6x2P, rear air suspension with fixed 3rd axle (twin wheels)
/FP = 4x2, 6x4, 6x2P, 6x2C, full air suspension
/FT = Only 6x2P, full air suspension with fixed 3rd axle (twin wheels)
/FS = Only 6x2P full air suspension with 3rd single wheel axle, controlled steering
/E = Rubber rear suspension (6x4, U.K. market)
General specifications
1.2Dimensions and weights
1.2.1General Specifications
The dimensions and maximum permissible mass on the axles are indicated on drawings, on technical
specifications and, in greater details, on the official documentation issued by the Company.
The kerb weights refer to vehicles with standard equipment. Special equipment may involve considerable
modification to the mass and its distribution on the axles.
Lights and rear-view mirrors positioning on our vehicles is designed for widths of 2,500 mm. This dimension
may also be applied to special body versions with a width of 2,600 mm (e.g. refrigerator vans).
Weighing the Chassis
As a result of production factors there may be a variation in mass of approx. 5%.
It is, therefore, advisable to determine the mass of the vehicle with its cab before fitting the body and equipment
and establishing their distribution on the axles.
1.2.2Determining the Centre of Gravity of the Body and Payload
Positioning on longitudinal plane
To establish the location of the centre of gravity of the body and payload the following examples below may
be used as guidelines.
The technical documentation specific to each model (chassis cab drawing) give the positions permitted with
the vehicle in its standard form. The masses and positioning of the single components of the vehicle are given
in the chassis and weight distribution diagram.
General specifications
1-9
Figure 1.1
Vehicles with 2 axles; vehicles with 3 axles with an
equal load on the two rear axles
Rear wheel axle or
tandem centre line
Example to determine the position of the centre of gravity of the payload plus body
W= Payload + body
= Share of payload on front axle
W
1
= Share of payload on rear axle (or tandem)
W
2
= Distance of centre of gravity from centre-line
L
1
of rear axle (or tandem centre-line)
L= Actual wheelbase
Figure 1.2
W1xL
=
L
1
W
respectively L
1
=L-
W2xL
W
Vehicles with 3 or more axles with a constant mass
distribution ratio on the two rear axles. For these
vehicles the ”ideal” values of the wheelbase and
centreline between the axles, resulting from mass
distribution, is determined by the Manufacturer.
Example to verify compliance of admitted masses on the axles
W= Payload + body
= Share of payload on front axle
W
1
= Share of payload on rear axles
W
2
= Share of payload on first rear axle
W
3
= Share of payloa d on second rear axle
W
4
= Distance of centre of gravity relative
L
1
calculated centreline
L= Calculated wheelbase (ideal)
= Calculated centreline (ideal)
L
2
A= Distance between rear axles
1-10
W
1
W
2
W
3=W2
W
4
WxL
=
=Wx
W2xL
=
x
L
A
1
(L - L1)
L
(A - L2)
A
2
Attention:
On vehicles with three or more axles, with
a variable mass distribution ratio on the two
rear axles depending on the load, the ”ideal”
values of wheelbase and centreline between
the axles will have to be calculated on the basis of the information given in the chassis cab
diagram, or in the specific documentation
specially prepared by IVECO. In this way, for
special versions (e.g. cranes on rear overhang) it will be possible to determine the correct positioning of the centre of gravity of the
equipment and payload on the basis of the actual load (see point 5.4 in section 5).
General specifications
Figure 1.3
4 axle vehicles with the same loading on both the
front and rear axles
Front axle
centreline
Example to determine the position of the centre of gravity of the payload plus body
W= Payload + body
= Share of payload on front axles
W
1
= Share of payload on rear axles (tandem)
W
2
= Distance of centre of gravity from centreline
L
1
of rear bogie
L= Actual wheelbase
respectively L
1
L
1
=L-
=
Rear axle (tandem)
centre line
W1xL
W
W2xL
W
General specifications
1-11
In order to apportion the payload on the axles, it must be uniformly distributed except when the shape of the
loading surface itself entails a different distribution of the load.
As for equipment, the actual location of the centre of gravity is considered.
When building bodies or containers, loading and unloading systems for the transported goods must be devised
which preclude excessive variations in the distribution of the load and/or excessive loads on the axles, also giving
the relevant instructions to the users.
The bodybuilder will also need to install suitable payload securing systems on the body so that transport can
be made with the utmost safety.
Figure 1.4
Uniform distribution of the loadNon-uniform distribution of the load due to the
Uniform distribution of the loadNon-uniform distribution of the load (beware of
lack of a rear overhang
load on axles and of minimum ratio)
1-12
General specifications
HeightoftheCentreofGravity
The height of the centre of gravity of the chassis cab is given in the technical documentation specific to each
model (chassis drawing).
For testing the vehicle complete with superstructure, the bodybuilder must check that the height of the centre
of gravity of the equipment including the payload, or of the entire vehicle when fully loaded, falls within the
maximum permitted values.
These limits are defined in compliance with the national or international regulations (e.g. EC Directive 71/320
as amended by the current braking directive regarding breaking) or requested by the Manufacturer to ensure
good handling of the vehicle (e.g. transverse stability of the moving vehicle).
In order to comply with the current EC Directive, IVECO provides information for the various models
(wheelbase and specific body) on computer, regarding:
-Height of centre of gravity of chassis cab (e.g. chassis cab diagram, braking data);
-Maximum height of centre of gravity of complete vehicle at full load
(e.g. national type-approval document);
-Braking capacity of each single axle (e.g. braking data).
Figure 1.5
Verification with full load:
(Wv . Hv) + (Ws . Hs)
Ht =
Wv = Chassis cab vehicle tare weight
Hv= Height of centre of gravity of chassis cab vehicle (laden condition)
Ws = Payload plus superstructure tare
Hs= Height of centre of gravity of body and payload in relation to ground
Wt = Vehicle mass when fully loaded
Ht= Height of centre of gravity of vehicle with full load
Wv + Ws
[(Wv + Ws) . Ht] − (Wv . Hv)
Hs =
Ws
To check the vehicle with its body but no payload, use above formula but for Ws use only the body tare weight
(The position for Hv will depend on the load and deflection of the suspension).
General specifications
1-13
The height of the centre of gravity indicated in table 1.1 represents values which are not to be exceeded for
each given equipment level. These values have been calculated only in terms of the transverse stability of the
vehicle and are applicable to a mid wheelbase. Any other possible restrictive specification, e.g. braking
regulation, should be taken into consideration.
The values given in table 1.1 refer to the superstructure with fixed payload. In versions where the payload tends
to move on side (e.g. suspended loads, fluid loads etc.) especially when turning, higher dynamic stress is
generated which makes the vehicle less stable. This must be taken into consideration when providing vehicle
operating instructions or for possible reduction in the height of the centre of gravity.
Using Stabiliser Bars
Supplementary stabilising or anti-roll bars, where available, spring reinforcements or the application of
rubber components (incompliance with point 2.7) may increase the height of the centre of gravity of the payload
which must be defined as each occasion arises. The modification must be carried out after careful consideration
has been given to the specifications of the version, to the wheelbase and to the distribution of the cross-stresses
acting on the suspension both at the front and at the rear of the vehicle. It must be borne in mind that it is often
advisable to modify the rear axle only since a modified front axle would give the driver a false sense of stability
making it more difficult to perceive the safety limits. Modification to the front axle may be made where the load
is positioned behind the cab (e.g. crane) or where the superstructures are very rigid (e.g. van conversion).
Exceeding the Limits
When transporting goods with an exceptionally high centre of gravity (e.g. machinery, indivisible cargo etc.)
from a technical point of view it is possible to exceed the values indicated in the table provided that the steering
system of the vehicle is suitably adapted to this condition (e.g. reduced speed, running path gradual variations,
etc.).
Modifications may only be carried out after approval has been received from IVECO.
1-14
General specifications
1.2.3Observing the Permitted Weights
All limits indicated in our documentation must be adhered to. The mass of the front axle is of particular
importance under varying load conditions, in order to ensure the correct steering characteristics on road
surfaces of all types.
Particular attention must therefore be paid to vehicles with a weight which is concentrated on the rear overhang
(e.g. cranes, tail-lifts, centre axle trailers) and to vehicles with a short wheelbase and a high centre of gravity
(e.g. silo vehicles, cement mixers).
When positioning the body and equipment, the loads must be correctly distributed transversally. For each
wheel a variation in the rated load (1/2 of the axial load) of 4% is permitted (e.g. admitted load on axle: 10,000
kg load admitted on each wheel: 4, 800 to 5,200 kg) provided that the tyres permit it, without impairing braking
or driving stability.
For vehicles with an added rear lift axle it must be remembered that, with the axle in the raised position, the
effective wheelbase is reduced, whereas the rear overhang is increased. It is therefore advisable that the centre
of gravity of the body and payload is located in front of the centre line of the driving axle. In addition to this
it is not advisable to equip a vehicle which has its load concentrated at the rear, with a lifting device. Apart from
different specifications for specific individual vehicles, the following may be taken to be the minimum values for
the front axle:
-20% of the total vehicle mass with uniformly distributed loads
-25% of the total vehicle mass for loads that are concentrated on the rear overhang.
The rear overhang of the body must be built in strict observance of the permitted axle loads, the limitations
in length, the positioning of the tow hook and of the underride guard stipulated by the relevant laws and
regulations.
Variations in the Permissible Mass
Special exceptions to the maximum permissible mass may be granted for particular applications for which,
however, precise limitations regarding the use will be imposed in addition to possible vehicle reinforcements.
Such exemptions, if they exceed the limits imposed by law, must be authorised by the Administrative Authority.
A reduction in admissable vehicle load (downrating) may require interventions on some parts, such as the
suspension. In these circumstances, the necessary indications may be supplied.
-Tare distribution on the axles (e.g. vehicles equipped with crane and body) including positions of the centre
of gravity of the payload.
-Proposals concerning the reinforcement of the vehicle components where necessary.
General specifications
1-15
Table 1.1
gypy(
MP260
Maximum heights in relation to the centre
1)
of gravity
of the payload and cornering stability
MODELSBASIC EQUIPMENT
ML 60; 60Pxx2450
ML 60Kxx2400
ML 65; 75; 80; 65P; 75P; 80Pxx2300
ML 65K; 75Kxx2250
ML 65Hxx2400
ML 80Kxx2350
ML 85Hxx2400
ML 95Wxx2750
ML 100; 100Pxx2200
ML 100Kxx2250
ML 100Wxx2470
ML 120; 120Pxx2400
ML 110EL ; /Pxx2200
ML 120Kxx2550
ML 120Hxx2550
ML 130xx2300
ML 130P; 130FPxx2400
ML 130K; 150Kxx2500
ML 135Wxx2750
ML 140Wxx2500
ML 150xx2350
ML 150P; 150FPxx2400
ML 150Hxx2600
ML 170; ML 180xx2550 ; 2400
ML 170P; ML 180; /Pxx2650 ; 2500
ML 170Kxx2600
ML 260KEx--2650
MP 180; 180Pxx2650
MP 180FPxx2590
MH / MP 190xx2720
MH / MP 190Pxx2750
MP 190FPxx2700
MP 190Hxx2720
MP 190Wxx2800
MP 240; 240TN; MH 260; TNxx-2740
MP 240P; PS; MH 260P; PSxxx2720
MP 240FP; FSxxx2690
MP 240PT; MH 260PTxxx2830
MP 240FTxxx2850
MP 260
with anti-roll bars
FrontRear
1212
x--2650
xSW-2650
Max. height (approx.) of centre
of gravity of payload (includ.
body or equipment) in relation
to the ground (mm)
1-16
General specifications
Table 1.1 (continued)
gypy(
Maximum heights in relation to the centre
1)
of gravity
of the payload and cornering stability
MODELSBASIC EQUIPMENT
with anti-roll bars
FrontRear
1212
MP 260Pxxx2720
MP 260FPxxx2680
MP 260Hxx-2780
MP 260Wxx-2890
MP 330Hxx-2600
MP 330Wxx-2620
MP 380Hxx-2510
MP 380Wxx-2520
MP 340Hx-x-2290
MP 410H/HBx-x-2510
Max. height (approx.) of centre
of gravity of payload (includ.
body or equipment) in relation
to the ground (mm)
Note:
1) = values referred to the transversal stability of the vehicle comply with further possible restrictions imposed b y the
regulations in force (e.g. braking system).
x = with standard anti-roll bar
-= without anti-roll bar
SW = anti-roll bar on request
General specifications
1-17
1.3Instructions for the Correct Functioning of the Parts of the Vehicle and
Accessibility for Maintenance
As a rule, when modifying or installing any type of equipment, nothing must be altered which prevents the
correct functioning of assemblies and parts of the vehicle under all operational conditions.
For example:
-Ready access to all parts requiring inspection or maintenance and periodic servicing must be provided. In
the case of closed body types suitable opening doors must be provided.
-For tilting cabs, adequate space permitting tilting must be assured. In the case of structures which involve
the space above the driver’s cab, adequate space for the passage of intake air must be guaranteed (see fig1.6).
Figure 1.6
1 Retain adequate room for tilting the driver’s cab
2 Retain the free space above the gearbox (for tractors with semitrailers consider the movement between tractor and semitrailer)
3 Cab rotational centre
4 Observe the minimum distance required by the specific documentation
-Service access to chassis/driveline components must be retained. For instance repairing the gearbox or
clutch must be possible without necessitating the removal of major components of the added structure.
-The cooling system (radiator cowling, radiator, air passages, cooling circuit etc.), fuel supply (pump position,
filters, pipe diameter, etc.) and the engine air intake must not be altered.
-The anti-noise panels must not be altered or moved in order to prevent changes in the approved noise levels
of the vehicle. Should it be necessary to make openings (e.g. for the longitudinal runner of the body to pass
through) these must be properlyclosed off using material with inflammability and soundproofing
characteristics equivalent to those used originally.
1-18
General specifications
-Adequate ventilation of the brakes and battery case (especially in the case of vans) must be guaranteed.
-The positioning of the mud-guards and wheel-arches must allow free movement of the rear wheels even
when chains are being used. Sufficient space must also be ensured with lifting axles. Some of our models have
3rd axle steering which also steers in the raised position; and it is necessary to leave space for this function
(see point 2.20).
-When vehicle body building has been completed the adjustment of the headlights must be checked for safety
and re-adjusted where necessary. In these circumstances it may be necessary to adjust the screw on the
headlights or to check the adjustment range of theadjusting device when the vehicle is laden. The adjustment
must be carried out in compliance with the instructions given in the Owner’s Manual in which the new values,
if any, will be included.
-In the case of parts which are supplied loose (e.g. spare wheel, chocks) it will be the responsibility of the
bodybuilder to position and secure them in an accessible and safe manner in compliance with possible
national laws.
1.4Legal Provisions and Prevention of Accidents
On completing the vehicle the bodybuilder/chassis converter must check the work (modifications, body +
equipment etc.) to ensure that the legal provisions required in the country of registration are observed (e.g.
weights, dimensions, braking, noise, emissions etc.). Information regarding these matters may be obtained from
the competent Authorities or the IVECO Area Network.
The vehicles manufactured at our plant (except some versions for extra-European countries) comply with the
EEC directives. Converted vehicles must also comply with these directives. The only permissible exception is
granted where local type approval differs from EEC homologation.
Prevention of Accidents
The structures and devices fitted to the vehicles must comply with the current regulations concerning the
prevention of accidents and safety regulations in force in the countries where the vehicle is to be used. All the
precautions dictated by technical awareness must be adopted to prevent malfunction and functional defects.
Compliance with these regulations will be the responsibility of the manufacturers of the structures and devices.
Warning
Components such as seats, upholstery, seals, protective panels etc, may constitute a potential fire risk if
exposed to sources of intense heat.
Remove these components before undertaking welding or flame-cutting work.
General specifications
1-19
1.5Choice of material to use: Ecology - Recycling
Increasingly greater attention should be p aid, at the study and design stage, to the choice of materials to
be used. T his is especially the case as regards the aspects connected with ecology and recycling in the light
of domestic and international regulations that are constantly being developed in the sector.
In this connection:
-Everyone must be aware of the prohibitions on using harmful or potentially hazardous materials, such as
ones containing asbestos, lead, halogen additives, fluorocarbons, etc.
-Use materials whose processing produces limited waste and that permit easy recycling after their first use.
-With composite synthetic materials, use components that are compatible with each other, envisaging also
their possible utilization with the addition of other salvaged components. Affix the markings required in
compliance with the current regulations.
1.6Quality System management
For some time IVECO has been promoting Quality System development and training for bodybuilders.
This is a requirement due not only to compliance with domestic and international regulations on product
liability, but also the growing demand for increasingly higher quality levels. The creation of new forms of
organization in the various sectors and the quest for increasingly more advanced levels of efficiency.
IVECO believes it expedient for bodybuilders to be equipped with an organization where the following are
defined and available:
-Organization charts for functions and responsibilities
-Quality system
-Quality goals
-Technical design documentation
-Process and control phases with relevant resources
-Product improvement plan, obtained also with corrective actions
-After sales service
-Staff training
-Manufacturer liability documentation.
1-20
General specifications
1.7Vehicle delivery
Before delivering the vehicle to the Customer check that:
-The equipment requested has been correctly fitted.
-The vehicle and equipment is completely ready for service and fully operational.
-The functionality and safety of the vehicle and/or equipment has been respected.
-Information/documentation concerning the equipment has been included.
-New data have been entered on the appropriate plates (where applicable)
Concerning the periodical checks on the vehicle, please remember the instructions for correct battery
maintenance referred to on the specific information sheets on the vehicle before delivery to the customer.
The bodybuilder will moreover need to confirm that the operations carried out are in compliance with the
latest bodybuilder instructions manual/documentation provided by IVECO and with the requirements of the
law.
Guarantee
A guarantee is provided for all our vehicles, under the terms and conditions set out in the relevant
documentation. An equivalent guarantee must be provided by the bodybuilder/chassis converter covering the
work carried out, by them.
General specifications
1-21
1-22
General specifications
2.CHASSIS
MODIFICATIONS
Chassis modifications
2-1
2-2
Chassis modifications
Index
2.Chassis Modifications
2.1General2-5
2.1.1General Specifications and Approval of the Company concerning Modifications
of the Chassis2-5
2.1.2Specific Precautions2-6
2.1.3Protection against Rust and Painting2-7
2.2Specific Instructions2-9
2.2.1Drilling the Chassis2-9
2.2.2Bolts and Rivets2-9
2.2.3Characteristics of the Materials to be Used when Modifying the Original Chassis2-10
2.2.4Welding the Chassis2-10
2.3Modifying the Wheelbase2-13
2.3.1General Specifications2-13
2.3.2Modifying the Drive Line2-17
2.4Modifying the Rear Overhang2-22
2.4.1Reducing the Overhang2-22
2.4.2Increasing the Overhang2-22
2.5Installing a Towing Device2-24
2.5.1General Specifications2-24
2.5.2Increasing the Towable Mass2-25
2.5.3Lowered Rear Cross-Member2-26
2.5.4Centre Axle Trailers (Rigid Towbar)2-28
2.6Installing a Supplementary Axle2-45
2.7Work on the Suspension2-55
2.7.1Changing a Mechanical Suspension into a Pneumatic o r Mixed Suspension2-55
2.8Modification of the Engine Air Intake and Exhaust Systems2-56
2.8.1Vertical Exhaust2-57
2.9Modifications of the Engine Cooling System2-58
2.10Installation of a Supplementary Heating System2-59
2.11Installing an Air Conditioning System2-60
2.12Cab Modifications2-61
2.12.1General Specifications2-61
2.12.2Roof Panel Modifications2-61
2.12.3Installation of a Spoiler or Top-sleeper2-62
2.12.4Crew Cabs2-62
Chassis modifications
2-3
2.13Changing the Size of the Tyres2-64
2.14Modifications to the Braking System2-65
2.14.1General Specifications2-65
2.14.2Brake Pipes2-65
2.14.3Vehicles with ABS Devices2-68
2.14.4Taking air from the System2-69
2.14.5Instructions for Adjusting the Load Apportioning Valve2-69
2.14.6Installing a Load Apportioning Valve on Vehicles not so Equipped2-71
2.15Electrical system: Modifications and Drawing-off Power2-72
2.15.1General Information2-72
2.15.2Additional equipment2-75
2.15.3Power Draw-off2-78
2.15.3.1EuroCargo Range;
EuroTech, Star, Trakker Range (Production until June 98)2-78
2.15.3.2EuroCargo T
ECTOR range2-82
2.15.3.2.1Connection for Engine switching off when a Person is standing on the Footboard
and the Reverse gear is engaged2-91
2.15.3.3EuroTrakker and EuroTech MH range with Cursor engine
EuroTech, Star, Trakker range (production started as of July 1998)2-92
2.15.4Additional Circuits2-96
2.15.5Harness Modifications due to Changes to Wheelbase or Overhang2-97
2.15.6Power Draw-off at a Voltage Different from that of the System2-97
2.15.7Battery Main Switch2-97
2.15.8Installing Side Marker Lamps2-97
2.16Repositioning Parts and Mounting Auxiliary Assemblies and Equipment2-102
2.17Transporting Dangerous Goods2-104
2.18Retarder Installation2-105
2.19Modifications to the Rear Underrun2-106
2.20Rear Mudguards and Wheel Boxes2-107
2.21Mudflaps2-108
2.22Side Guards2-108
2.23Chocks2-109
2-4
Chassis modifications
2.1General
2.1.1General Specifications and Approval of the Company concerning
Modifications of the Chassis
Any modifications must be carried out according to the criteria detailed in the following paragraphs.
Particular attention must be given to the following points:
-Welding to the bearing structures of the chassis is explicitly prohibited (with the exception of
the items described at points 2.2.4, 2.3, 2.4 and 2.6).
-Holes in the flanges of the side members are not permitted (except for the items described at point
3.1.2).
-Where riveted connections exist and can be modified as explained below, these can be replaced by
flanged-head screws and nuts of min. class 8.8 or by hex screws of the next greater diameter and self locking
nuts. Screws greater than M14 must not be used (max. diameter of hole 15 mm) unless otherwise specified.
-In cases where the original joints were detached and rejoined with bolts or where rivets are replaced with
bolts, the bolt torque must be checked after the vehicle has been driven approximately 500 to 1.000 kms.
IVECO Approval
The following modifications may only be performed following IVECO approval:
a) Modifications to the wheelbase following instructions given at points 2.2.3, 2.2.4, and 2.3.
b) Modifications to the rear overhang within the limitations imposed by weight and national legislation,
following instructions given at points 2.2.3, 2.2.4 and 2.4.
c) Work on the braking system (see point 2.14) and on the steering system (after appropriate checks).
d) Modification to the characteristics of the suspension (see point 2.7).
e) Changing mechanical suspension into a pneumatic or mixed suspension (see point 2.7.1.).
f) Modifications to the driver’s cab (see point 2.12).
g) Modifications to the exhaust system and to the engine air intake (see point 2.8).
h) Modifications to the engine cooling system (see point 2.9).
i) Modifications to the engine assembly and driving gear (see point 2.3.2).
k) Modifications to the front and rear axles
l) Installation of supplementary axles following the instructions given at point 2.6.
m) Installation of retarder brakes (see point 2.18).
n) Installation of power take-offs (in cases where authorisation is required, see paragraph 4).
o) Changing the dimensions of the tyres (see point 2.13).
As a general rule, to obtain official approval, the request must contain full documentation illustrating the intended
project which must reflect the general and specific specifications contained therein.
It is the responsibility of the bodybuilder to present the intended modification to the proper authorities and
to seek their approval whenever called upon to do so by national laws.
Chassis modifications
2-5
2.1.2 Specific Precautions
During the welding, drilling, grinding and cutting operations when working in the proximity of brake lines
and particularly if these are of plastic material or electric wiring, care must be taken to ensure their
protection. Where necessary they should be removed (follow the instructions given in paragraphs 2.2.3 and
2.15).
Figura 2.1
Regarding the electrical equipment remember to:
a) Take precautions concerning the alternator and the electrical/electronic components. In order to avoid
damaging the diode rectifier, never disconnect the batteries (or open the isolator) when the engine is
running.
If the vehicle has to be tow started make certain that the batteries are connected. Should it be necessary
to quick charge the batteries, disconnect them from the vehicle circuit.
In order to run the engine with external means and in order to avoid current peaks which might damage
the electric/electronic components, do not use the ”start” function in conjunction with external charge
devices if such devices are equipped with this function. Starting will have to be carried out only with the
external battery trolley ensuring correct polarity.
b) Checking the earth connections.
As a general rule the original earth connections of the vehicle must not be changed. If it is necessary to move
these connections or to implement further earth points use the existing holes on the chassis as far as
possible and:
-Remove, mechanically, and/or with an appropriate chemical product, the paint on the chassis side and
ontheterminalsidecreatingarestingplanefreefromindentationsorridges.
-Apply appropriate high conductivity paint between the cable terminal and the metal surface (e.g.
galvanizing paint IVECO Part number 459622 by PPG).
-Connect the earth cables within 5 minutes from the application of the paint.
Do not use the IVECO standardised M1 (battery earth connection) M2, M 8 (earth connection for starter
motor depending onthe driving position) points for the earth connectionsfor control switches (e.g. sensors
or low absorption devices): See IVECO Workshop manuals.
With regard to the electronic devices, avoid linking earth connections between the devices; only use single
wire earths with optimised lengths (as short as possible).
2-6
Chassis modifications
c) Electric wiring.
The wires of the electrical equipment must be connected by waterproof connections of the same type as
the original. The additional section of wire must be protected inside an appropriate sheath and suitably
attached by clips. The new wiring must not be positioned on the side of the electronic circuits already
existing on the vehicle.
For further information regarding the braking and electronic system, refer to chapter 2.14 and 2.15.
2.1.3Protection against Rust and Painting
All parts of the vehicle (chassis, driver’s cab, body etc.) which have been subject to modification must be
protected against oxidation and corrosion.
Protection and painting operations must be carried out with due care on all the parts concerned.
In particular the frame, cab and various parts exposed to atmospheric agents and sunlight must be treated with
a cycle which includes:
Ironphosphor - degreasing, anti-corrosion, sealing, primer coat and final coat (the enamel type
primer can be replaced with powdered paint, the cab body excluded).
Miscellaneous parts (boxes, protective grills etc.) with complex forms (with boxed parts, joints, overlaps and
areas not accessible using the traditional spray application) which are attached to the frame must be treated
with a cycle which includes:
Ironphosphor - degreasing, electrophoresis or immersion anti-corrosion, enamel or powdered
paint.
When joining surfaces by welding and when the electrophoretic stage is not used, it is extremely important
to protect the contact surfaces with the electrically weldable paints.
For those parts which are not directly in contact with atmospheric agents (e.g. inside the cab) reduced cycles
are acceptable.
Ironphosphor - degreasing, powdered paints or phosphor - degreasing, electrophoresis or
phosphor - degreasing, anti-corrosion.
The phosphor - degreasing process may be replaced by degreasingwith solvents and wash primer
(5 to 10 µm).
Other important operations included are: protection of the open or semi-open boxed parts using oil-wax
products by injection using suitable probes, sealing of the joints and overlaps of the areas subject to abrasive
action (wheel arches, under body, etc.) using specific product (elastomers, acrylics, etc.) after the anti-corrosion
protection.
Parts mounted on the outside of the cab (brackets and bolts in general) must be of stainless steel or protected
with ”Dacromet”. The coupling elements (hinges, handles etc.) used on the frame and/or body (floor panels,
tanks etc) must be protected with ”Dacromet” or with 12 µm min. galvanising. The same quality of the parts
used on the cab must in all cases be guaranteed.
Chassis modifications
2-7
Precautions
Suitable precautions must be taken to protect those parts whose conversion and operation could be
damaged by paints such as:
-Rubber or plastic hoses for the air and hydraulic installations.
-Gaskets, parts in rubber or plastic.
-Flanges of the transmission shafts or power take-offs.
-Radiators.
-Shock absorber and hydraulic or air cylinder rods.
-Drainage and bleeder valves (mechanical components, air tanks, cold starting heater plug pre-heating tanks etc.).
-Fuel sediment filter.
-Nameplates and logos.
Engines with electric and electronic components
-On all the engine and vehicle wiring harness, including earth contacts.
-On all connectors on the sensor/actuator side and wiring harness side.
-On all sensors/actuators, on flywheel, on flywheel revs sensor support bracket.
-On the pipes (plastic and metal) of all the diesel fuel circuit.
-On the complete diesel fuel filter base.
-On the control unit and its respective base.
-On the area inside the sound-proof cover (injectors, rail, pipes).
-On the common rail pump complete with regulator.
-On the vehicle’s electric pump.
-On the tank.
-On the front belts and relevant pulleys
-On the power-steering pump and its respective piping.
If the wheels are removed protect the contact surfaces on the drums and hubs, avoid increasing the thickness
and especially avoid the build-up of paint on the connecting flanges of the wheel disks and resting points of the
fixing nuts. Ensure that the disc brakes are adequately protected.
The electronic components and modules must be removed.
When the painting operation is to be completed by oven drying (max. temp. 80ºC), all parts which may be
damaged by exposure to heat must be removed.
When modifing the cab the application of noise deadening and insulating materials must be included inside the
cab and under the floor to eliminate vibrations, contain noise levels and to restore the original heat insulation
levels.
2-8
Chassis modifications
2.2Specific Instructions
2.2.1Drilling the Chassis
When it is necessary to mount assemblies or auxiliary units on the chassis, as a general rule, the existing
holes made at the factory should be used.
Under no circumstances should the flanges of the sidemember of the vehicle be drilled unless in
compliance with the indications given in point 3.1.2.
In those cases (installation of shelves, brackets etc.) where it is necessary to drill new holes, they must be drilled
in the vertical web of the side member and must be carefully deburred and reamed.
Position and Size
The new holes must not be made in areas of high stress (such as supports for springs) and at variance with
the cross-section of the side member.
The diameter of the holes must be proportional to the thickness of the steel. Under no circumstances must
this exceed 15 mm unless otherwise specified. The distance from the centre of the hole to the edges of the
side member must not be below 40 mm. The centres of the holes must never be located at a distance of less
than 45 mm from each other or in relation to the existing holes. The holes must be staggered as shown in figure
2.2. When relocating spring supports or cross members, the same drilling arrangements must be preserved.
Figure 2.2
2.2.2.Bolts and Rivets
In general, fixings of the same type and class designed for similar fixings of the original vehicle should be used.
Use class 10.9 bolts for high-stress fixings (e.g. spring supports, bar connections, shock absorbers etc.). When
space permits it use flanged head screws and nuts.
Chassis modifications
2-9
2.2.3Characteristics of the Materials to be Used when Modifying
the Original Chassis
For the modification of the vehicle’s chassis and for the reinforcements applied directly to the side members,
the material used must correspond both in quality and thickness to that of the original chassis. If material of
the specified thickness is not available standard material of the next greater thickness (e.g. 7 mm instead of 6.7
mm)canbeused.Thematerialtobeusedmustmeettheseminimumstandards.
Vehicles with a weight rating equal to or lower than ML 180, including ML 260 KE (EuroCargo):
Chassis made of high yield steelFeE420 (QSt E 420 TM-BS1499 part I grade 46/40)
Tensile strengthR
Yield pointR 0.2
StretchingA 5
≥ 530 N/mm
≥ 420 N/mm
≥ 21%
2
(53 kg/mm2)
2
(42 kg/mm2)
Vehicles with a weight rating equal to or greater than MP 180 (EuroTech/EuroStar/EuroTrakker):
Chassis made of high yield steelFeE490 (QSt E 500TM-BS1449 HS 50/45)
Tensile strengthR
Yield pointR 0,2
≥ 610 N/mm
≥ 490 N/mm
2
(61 kg/mm2)
2
(49 kg/mm2)
StretchingA 5≥ 19%
As an alternative, only for extending of the rear overhang, Fe510D (QSt 52-3-BS4360, grade 50C) with the
following characteristics may be used:
For the dimensions and thicknesses, see the information given in the relevant documentation.
2.2.4Welding the Chassis
The welding operations may be carried out only by specialist, trained personnel using
equipment that is suitable to ensure high quality workmanship (see specifications EN
287).
Welding is permitted:
-for joining of the side members if they are lengthened or shortened.
-for the application of reinforcing L section flitch on a side member that is to be modified as detailed below
(see Fig. 2.5).
For vehicles equipped with electronic devices (e.g. ABS, EDC, ECAS, etc.) disconnect the connectors of the
control units (see wiring diagram in the relevant documentation); see their positioning on the vehicle in section
5 (point 5.2). Should close welding be required, remove the control unit from its position.
During welding earth the welding machine directly to the piece that is to be welded in order to protect the
electrical equipment (alternator, batteries). Ensure that the negative pole of the battery has been disconnected.
2-10
Chassis modifications
Plastic pipes must be protected from heat sources and splashes of material during welding. If necessary these
parts should be removed.
The surfaces of the leaf springs and air springs must be protected against weld splashes during welding. Do
not allow the electrodes or conductors to come into contact with the spring.
As part of the procedure it will be necessary to remove the paint and deoxidise the parts of the chassis that
are affected by the welding operation as well as those parts which may have to be covered by possible
reinforcements. When work has been completed the modified part must be protected with adequate
rustproofing (see point 2.1.3.).
The instructions given below should be followed to ensure that welding is carried out correctly.
a) Cut the side members with a diagonal or vertical cut. (We recommend that the diagonal cut be used
particularly for the section between the wheelbase) Cuts are not permitted in areas in which the profile
ofthesidememberaswellasthechassiswidthchangeor in those where there is a high concentration of
stresses (e.g. spring brackets). The cuts must not be made through the holes present in the side member
(see Fig. 2.3.).
Figure 2.3
NO
NO
YES
YES
b) on the inner side of the side member give the parts that are to be joined a V-shaped chamfer of 60° along
theentirelengthtobewelded(seeFig.2.4).
c) archweld in stretches using carefully dried basic electrodes. The recommended electrodes are:
for FeE420 (BS 1449 HS 46/40): DIN 1913 - E 51 B 1023
FeE490 (BS 1449 HS 50/45): DIN 8529 - EY 4687 Mn 1 Ni B H5
Diameter of the electrode is 2.5 mm, current intensity approx. 90A (max. 40A for each millimetre of
diameter of the electrode).
Using MIG-MAG welding use a welding rod with the same characteristics as the material to be welded
(diameter 1 to 1.2 mm).
Recommended welding rod:DIN 8559 - SG3 M2 5243
gas DIN 32526-M21 or DIN EN 439
For the FeE490 (BS 1449 HS 50/45) material when used with low temperatures, the following are
recommended:
PrEN 440 G7 AWS A 5.28 - ER 80S - Ni 1
gas DIN EN439-M21
Avoid current overloading. Welding must be free from marginal cuts and waste material.
d) Repeat the operation on the reverse side by welding as detailed in point c).
e) Allow the side members to cool slowly and uniformly. Cooling by air, water or other means is not
permitted.
f) Remove excess material resulting from the welding operations by grinding.
Chassis modifications
2-11
Figure 2.4
g) On the inner side reinforcing L-section flitches should be applied. These should be made of steel and have
the same characteristics as the steel used for the chassis. The minimum dimensions are given in Fig. 2.5.
The reinforcements may only be fixed to the vertical web of the side member using welding beads, plug
welds, bolts or rivets (Huck rivets may also be used).
The cross-section and the length of the weld bead, the number and distribution of the plug welds, bolts or
rivets must be adequate to transmit the bending and shearing moment of the section.
Figure 2.5
a ~= 0.3 H
b ~= H (min 175 mm)
S ~= (0.8 to 1) S1
Closing of existing holes
If, when making new holes, the existing holes are found to be too close (see Fig. 2.2) these may be closed
up by welding. To ensure the success of this operation the outer edge of the hole should be chamfered and
copper plate used for the inner part.
For holes with a diameter of over 20 mm, chamfered plugs may be used, welded on both sides.
2-12
Chassis modifications
2.3Modifying the Wheelbase
MT180
t
p
t
S:1-1
3
8000110A:
2,4,6-1
2
2.3.1General Specifications
As a rule, for each vehicle, modification to the wheelbase must be carried out on the standard wheelbase
above or closer to the new wheelbase required.
The measurements given in the written authorisations will apply in all cases particularly for extensions made
to the longest standard wheelbase.
On vehicles with a parallel chassis and constant-section side members, the wheelbase should be modified by
repositioning the rear axle (or axles) when the internal reinforcements and their connections to the chassis
permit it. The suspensions supports must also be repositioned ensuring that they are positioned where there
are crossbars in compliance with the points detailed in 2.2.1.
In other cases the chassis may be cut following the instructions given in point 2.2.4.
Whenever permitted by the body size, wheelbases should be made equal to those planned in our production.
This enables the original transmission shafts and previously defined crossmember positions to be used. When
extending a wheelbase beyond the production longest planned, the vehicle used must have the longest
production wheelbase to ensure the correct thickness side members are used. Particular care must be taken
to comply with the limits set by national regulations particularly with regard to the limits for overall dimensions
(where specified).
Consequences for steering
The lengthening of the wheelbase, depending on its extent, can affect the steering characteristics. Whenever
national regulations require it, the limits on the overall dimensions must be observed as well as the limits
concerning the effort applied on the steering wheel and the relevant operation times (e.g. ECE - R 79/01
standard). Table 2.1 shows the permitted wheelbase lengthening values for a standard steering system, the
maximum permitted load on the front axle and the specified tyre type.
Should longer wheelbase dimensions be needed, for special versions, it will be necessary to envisage various
devices aimed at improving the steering characteristics such as a reduction in the maximum permitted load on
the front axle or the installation of wheels and tyres with shorter kingpin offset values. The adoption of an
additional pump and a dual circuit power steering unit, if not immediately available, will require authorisation
and must only be installed by an authorised workshop.
Table 2.1.
Maximum permitted wheelbase lengthening depending on the load on the front axle and tyre
dimensions (ECE - R79/01 regulation or EC Directive 96/2)
ModelsMax. load on front axle
ML 60-100Standard-Standard and optional5006300
ML 120-150-170Standard-Standard and optional5006700
ML 60-180Tector Range-Standard and optional4656570
MT 180
MT 190
MH 190
MP 180
MP 190
ML 260 KE7100-Standard and optional5004190
MH 260/PS8000
MH 260/P; PT; TN8000
MP 240/P; FP
MP 240/FT; PT
MP 240; 240/TN
MP 260
MP 240/FS; PS8000110
1)
For tyre type see page 2-14.
(observe tyre carrying
capacity) (kg)
7500-S
7500100
8000119
8000110
8000110
Kingpin
offset
(mm)
120
89
72S: 1
120
Permitted tyres
S: 1-13
A: 2, 4, 6-9
Sp:2,4,6-11
S: 6-15
A: 2, 4, 6-12
Sp:2,4,6-12
S: 1-13
A: 2, 4, 6-12
Sp:2,4,6-12
S: 1-15
A: 2, 4, 6-12
Sp:2,4,6-12
S: 1-11
A: 2, 4
Sp:2,4
S: 1-15
A: 2, 4, 6-12
Sp:2,4,6-12
S: 1-15
A: 2, 4, 6-12
Sp:2,4,6-12
S: 1-13
A: 2, 4, 6-12
Sp:2,4,6-12
andard and o
1)
ional500/5306700
Steering wheel
dia. (mm)
4656210
465
530
500
5306300
5305100
5005100
500
530
500
530
500
530
Max wheelbase value
between 1st steering axle
and 1st driving axle
(mm)
5100
6300
5100
6100
4800
5100
4200
5100
Chassis modifications
2-13
Tyre type
Tyrecarryin
g
Type SizeKingpin offset (mm)
Rim
Front dead axleFront driving axle
SASpSASp
112.00 R 2424-8.572--105--8000
213 R 22.522.5x9.00 7684861081161187500/8000
312.00 R 2020x8.577--109--7500/8250
4315/80 R 22.522.5x9.00 7886881101181207500/8000
511.00 R 2020-8.580--111--6500/6700
612 R 22.522.5x8.25 8291931131221246700/7100
7315/70 R 22.522.5x9.00 8391931141221247100/7500
8295/80 R 22.522.5x8.25 8493951151241266700/7100
9305/70 R 22.522.5x8.25 8897991181271296700/7100
1011 R 22.522.5x7.50 88103991191341306300
11275/80 R 22.522.5x7.50 891041001201351316300
12275/70 R 22.522.5x7.50 931081051241391356000/6300
1310.00 R 2020-7.593--113--6000
1414.00 R 2020-10.0W 109--142--9000/10000
15385/65 R 22.522.5x11.75 110--141--8250/9000
1618 R 22.522.5x14.00 130--162--11200
17425/65 R 22.522.5x13.00 132--164--10300
Tyre carrying
capacity
S = Steel wheels
A = Alcoa aluminium wheels
Sp = Speedline aluminium wheels
Chassis Stress Level
When lengthening a wheelbase, in addition to local reinforcement on the side member joint, the bodybuilder
must provide sufficient reinforcements to achieve the section moduli of the side member section no lower than
that designed by IVECO for the same wheelbase or for next size up. Alternatively, when permitted by local
regulations, larger subframe sections can be used.
When prescribed by national regulations the bodybuilder must check that the stress limits are not exceeded.
In any event such stress must be no greater than that of a chassis with the original wheelbase assuming that
the load is evenly distributed and taking the chassis to be a beam resting on the spring hanger brackets.
When extending out from the longest original wheelbase the reinforcements must depend on the length of the
extension, the type of body built and the use to which the vehicle is to be put.
2-14
Chassis modifications
Approval
The alteration of the wheelbase for the 4x2 versions is permitted without specific approval by IVECO in
the following cases:
-if the wheelbase is to be lengthened and the new value is still within the standard range of length with the
same side member section. These dimensions can be found in the relevant technical documentation or in
the table from 3.9 to 3.10.
-if the wheelbase is to be shortened without falling below the standard minimum values established for each
model.
Provided the chassis converter gives sufficient guarantees from the technological and control point of view
(qualified personnel, adequate operating processes, etc.).
For the 6x2, 6x4 and 8x4 versions the wheelbase may only be modified following specific approval by IVECO.
This also applies to the 4x4 and 6x6 versions (all wheel drive) in which the position of the transfer box must
be maintained in relation to the front axle.
The conversion must be carried out in compliance with these instructions and the appropriate adjustments (e.g.
LAV adjustment) or adaptations made (e.g. change in the layout of the exhaust pipe) and taking those
precautions (e.g. adherence to the minimum rear axle load with unladen vehicle) which are normally taken by
IVECO for the corresponding original wheelbases.
Cross Members
The necessity of applying one or more cross members depends on the extent of extension, the location of
the transmission shaft support, the welding area, the introduction points of the forces produced by the body
and the condition under which the vehicle is to be used.
Any supplementary cross members must have the same features as those already existing (flexural strength,
torsional strength, quality of the material, connection to the side members, etc). Fig. 2.6 shows an example of
the application on the models of class 80 or higher of the On-Road Range. A cross member is mandatory for
any extension over 600 mm.
As a general rule the distance between the two cross members must not be greater than 1,000 to 1,200 mm.
The minimum distance between the two cross members particularly for off-road vehicles must not be less than
600 mm. The light cross member supporting the transmission is excluded from this limitation.
Figure 2.6
Chassis modifications
2-15
Recommended Procedure
To ensure the success of the operations proceed as follows:
-Arrange the vehicle so that the chassis is perfectly level, using the appropriate stands.
-Remove the transmission shafts, brake lines, electrical wires and any devices that may prevent the work from
being carried out efficiently.
-Identify the reference points on the chassis (e.g. pilot holes, suspension supports).
-Mark the reference points with a light line of punch marks on the top flange on both side members after
ensuring that their joining line is perfectly at right-angles to the longitudinal axis of the vehicle.
-When re-positioning the spring hanger brackets, identify the new position using the reference marks made
previously.
Check that the new measurements are identical between the left and right sides. Differences no greater than
2 mm should emerge from diagonal checking of the lengths less than 1,500 mm.
Unless another tool is available, make new holes by using the supports and gussets of the cross members
as a template.
Fix the supports and cross members with rivets or bolts. If using bolts, fix the supports by reaming the holes
and using class 10.9 calibratedbolts with nuts equipped with a device that prevents them from working loose.
When space permits it use flanged-head screws and nuts.
-If cutting the chassis, make a second line of reference points so that the area affected by the modification
is included between these and the previous points (in any event ensure a distance of not less than 1500 mm.
measured when the work has been completed). Inside these two reference lines make points to mark out
the area of the cut then proceed as indicated in point 2.2.4.
Before welding, ensure that the side members, including any added portion, are perfectly aligned and take
measurements on both sides and diagonally to check, as previously described. Fit the reinforcements as
instructed at Point 2.2.4.
Further indications
-Protect the surfaces from oxidation as described in point 2.1.3.
-Restore the electrical and braking systems as described in points 2.14 and 2.15.
For vehicles with anti-lock brake systems (ABS) follow the instructions given in point 2.14.3.
-For work on the drive line follow the instructions given in point 2.3.2.
2-16
Chassis modifications
2.3.2 Modifying the Drive Line
Following the modification of the wheelbase, work on the transmission as a general rule, is carried out on
the basis of the transmission of a similar vehicle with approximately the same wheelbase. The maximum value
of the inclinations of the propeller shafts used for standard production vehicles is to be retained. This rule must
also be applied when any modifications to the suspension and rear drive axles are made.
In cases of particular difficulty, the assistance of the company may be sought. A diagram giving the length and
inclination of the proposed new transmission must accompany the request.
The purpose of the specifications contained in this manual is to ensure the proper functioning of the
transmission, to limit its noise and to avoid the build-up of stress transmitted from the engine assembly. In no
way does this diminish the responsibility of the bodybuilder for the work he has completed.
Permitted lengths
The maximum operating lengths obtainable for both the intermediate shaft sections and the sliding shafts
”LG” or ”LZ” (see fig.2.7) can be determined according to the external diameter of the tube existing on the
vehicle and the maximum operating rotational speed (see formula). These are specified in table 2.2.
For the propeller shaft length specified in Table 2.2. when the tube diameter is not sufficient, a new shaft section
with the same characteristics as the existing shafts must be used. As an alternative, in some cases the
transmission shaft with a larger diameter tube can be used. The tube diameter required can be determined
in compliance with the required length and the maximum rotational speed, directly from table 2.2.
Figure 2.7
Intermediate
Total length
LZ
Sliding
Total length
LG
Chassis modifications
2-17
The maximum propeller shaft speed is determined on the basis of the following formula (the necessary data
Outer
(mm
)
may be derived from the vehicle specifications and from the data plates on the engine, gearbox or transfer case).
n
max
=
n
G
iGxi
V
n
= Max. prop. shaft speed (rpm)
g
= Max. engine speed (r.p.m.) (see table 4.4)
n
max
= Gearbox ratio at top speed
i
G
= Ratio of power drive transmission in road gear
i
V
(only for shafts downstream of transfer case)
The greater thickness of the tube depends on the class, i.e. on the torque that the original shaft has to transmit
and on the design of the driveline (torque, ratios of kinematic chain, power axle load).
A reference value for the thickness of the tube of a general validity cannot be given. When, for example, a tube
of a larger diameter is to be used, its thickness should theoretically be reduced until the torsional strength of
the original tube is achieved. It should however be noted that, to determine the thickness of t he tube, the
following points are to be taken into account: the size of themaleelementofthefork,thepossiblenecessity
of adapters and the sizes of the tubes available.
Therefore the thickness of the tube should be agreed upon as each occasion arises with the workshops
authorised by the manufacturers of the transmission shaft depending on its dimensions (i.e. size of the universal
joint).
The minimum operating length (from flange to flange) must not fall below 800 mm for the sliding sections and
700 mm for the intermediate sections.
Inthecaseofdrivelinewhichconsistofseveralsegments, the individual shafts must all be approximately
of the same length. As a general rule, the difference in length between a non sliding and a splined shaft (see Fig.
2.8) must not exceed 600 mm. The difference in length between the shafts must not be more than 400 mm.
A margin of at least 25 mm must be left so that the sliding joint can travel when the splined shaft is closed. When
fully extended the shaft sliding sleeve should cover the splined stub for a length that should be about twice the
diameter of the splined stub itself.
When the required length of the drive line exceeds the permissible length, an additional driven shaft must be
provided as illustrated in Fig. 2.8.
Figure 2.8
from
to
1 Engine, clutch, gearbox axis
2 Intermediate shaft (non sliding)
3 Intermediate shaft support
4 Propeller shaft with sliding end
5 Inclination of rear axle case (static load)
6 Inclination of rear axle case (max. compression)
7 Inclination of rear axle case (unladen)
8 Intermediate shaft and axle case axis must have the same inclination
The intermediate shaft and the inclination of the rear axle case must be aligned accurately.
The difference in their inclination relative to the engine-clutch-gearbox axis must not vary more than 1°. This
may be achieved by placing a wedge between the rear axle case and the spring or, in vehicles equipped with
pneumatic suspension and in those with three axles and centre spring, by adjusting the torque arms of the rear
axle. The inclination of the rear axle must, however, not be greater than 5.5°.
Chassis modifications
2-19
When, with a loaded vehicle, the rear axle flange is at a level which is lower than that of the gearbox flange,
care must be taken to ensure that the inclination of the differential housing and of the driven shaft are greater
than the inclination of the engine-gearbox axis. On the other hand, if, with a loaded vehicle, the rear axle flange
is at a level which is higher than that of the gearbox flange, the inclination of the differential housing and of the
driven shaft must be less than the inclination of the engine-gearbox axis.
When the lengthening of the wheelbase is substantial, it may become necessary to employ a supplementary
intermediate shaft as shown in fig. 2.9. In this case the same inclination must be maintained between the
engine-gearbox axis, the second intermediate shaft and the axis of the differential housing.
44.2
5 Propeller shaft with splined end
6 Inclination of rear axle case (static load)
7 Inclination of rear axle case (max. compression)
8 Inclination of rear axle case (unladen)
9 Gearbox, 2nd intermediate shaft and rear axle case axis must have same inclination.
The elastic supports must consist of supporting plates with a thickness of at least 5 mm in the case of vehicle
destined for road use and of at least 7 mm in the case of yard use as indicated in Fig. 2.10 and should be fitted
with cross members with characteristics consistent with the original characteristics.
When reducing the wheelbase it is recommended that theintermediateshaftsberemovedifthelengthofthe
splined shaft is less than approximately 800 mm.
2-20
Chassis modifications
Figure 2.10
1 Intermediate shaft
2 Support bracket
3 Backing plate
4 Support of intermediate shaft
If the drive line consists of a single shaft the inclination of the axle housing must be the same as the inclination
of the engine-gearbox axis.
When modifying the wheelbase of vehicles with all-wheel drive, onlythe drive line ”downstream” of the transfer
case can be modified, In this case the specifications given above concern the inclination of the transfer case
instead of the engine-gearbox assembly.
The same holds true also for vehicles with separate gearbox. In addition to this, as a general rule, the wheelbase
of such vehicles cannot be reduced beyond the measurement of the shorter wheelbase contemplated for
standard production (dumpers for example).
The use of original drive line from IVECO is recommended for these modifications. Should this not be possible
2
however, hardened steel tubes with a yield point of not less than 420 N/mm
(42 kg/mm2) may be used.
Modifications to the universal joints are not permitted.
Whenever the transmission or part thereof, is modified, each modified section must be subjected to careful
dynamic balancing.
Important
Since transmission is important to vehicle driving safety, it should be borne in mind that any modification
toitmustbearmaximumoperationalguarantees.Onlyveryspecialisedandtransmission
manufacturer-certified companies should therefore be employed to carry out work of this kind.
Chassis modifications
2-21
2.4Modifying the Rear Overhang
In modifying the rear overhang it must be borne in mind that such modification entails changes in the
distribution of the payload on the axles relative to the loads established by IVECO (see point 1.2). The
limitations established by national laws must also be respected as well as the maximum distance from the rear
edge of the body and the ground clearance prescribed for the tow hook and the underrun bar. The distance
from the extremity of the chassis to the rear edge of the body must not, as a general rule, exceed 350 to 400
mm.
Should the bolted rear cross member be re-positioned, the same standard type of connections should be
maintained (i.e. number of screws, dimensions, class of resistance).
When re-positioning rear cross members originally fastened by rivets, these can be replaced by flanged nuts
and bolts with same diameter or by class 8.8 hexagonal-headed screws with the next largest diameter. Use
self-locking nuts (do not use bolts with a diameter larger than M14).
When the installation of a tow hook is planned an adequate distance (approximately 350 mm) must be left from
the rear cross member to the next nearest cross member for mounting and removing the tow hook wherever
necessary.
If the modifications are carried out competently and in compliance with the specifications contained in this
manual, the towable weight originally established may be retained. In any case responsibility for the work rests
with those who have carried it out.
Authorisation
The extension of the overhang at the rear of the chassis employing body overhang values up to 60% of the
wheelbase and shortening down to the minimum serial value of each model require no specific approval by
IVECO on condition that the operations are carried out in compliance with these instructions.
2.4.1Reducing the Overhang
When reducing the length of the rear overhang of the chassis (e.g. in the case of tippers) the last cross
member must be moved forward.
If, when reducing the length of the overhang, the rear cross member is found to be located too near to an
existing cross member, the latter must be removed if it does not affect the suspension supports.
2.4.2Increasing the Overhang
Various methods of increasing the length are given in Figs, 2.11 and 2.12.
The connection of the added section is to be carried out in compliance with the specifications given in point
2.2.4.
The frame may also be cut straight. The minimum dimensions of the reinforcements that are to be applied to
the modified section are indicated in Fig. 2.5.
Fig. 2.11 shows a typical method of extension for increases of 300 to 350 mm. In this case the reinforcing L-bars,
which also serve to connect the cross member and the chassis frame, must be of the same thickness and width
as the original gusset plate. The connection of the cross member and the plates, originally achieved with rivets,
may be made with class 8.8 bolts with the next larger diameter.
2-22
Chassis modifications
In those cases where the joint between the cross member and the gusset plate is made by means of a weld,
it is permissible to join the gusset plate to the reinforcement by welding (see fig 2.11).
When the increase exceeds 350 mm, Fig. 2.12 shows the procedure to be used.
Figure 2.11
1 Added portion
2 Reinforcing runner
3 Reinforcing runner (alternative solution)
4 Original rear cross member
Figure 2.12
1 Added portion
2 Reinforcing runner
3 Original rear cross member
4 Supplementary cross member (if necessary)
Chassis modifications
2-23
When the extension reaches a certain dimension, it will be necessary to examine on a case by case basis, the
feasibility of installing a supplementary cross member to give the frame sufficient torsional rigidity. Adding a
supplementary cross member with the same properties as the standard production cross member is necessary
whenever the distance between two cross members is greater than 1,200 mm.
2.5Installing a Towing Device
2.5.1General Specifications
Without prior authorisation, the installation of a tow-hook is permissible only on those cross members
which are intended for that use and on those vehicles which IVECO has intended for towing a trailer.
The subsequent installation of a tow hook in vehicles for which the installation of a tow hook was not originally
contemplated, must be authorised by IVECO.
In addition to the permissible towing weight, the authorisation will specify all other possible specifications that
are to be adhered to such as the use of the vehicle, the transmission ratio, the type of braking system as well
as possible specifications concerning reinforcements to be applied to the rear cross member or the necessity
for employing specially intended cross members.
In trailers with one or more axles close together (centre axle trailers), considering the stress resulting in
particular from the vertical dynamic load to which the rear cross member is subjected, the instructions given
in point 2.5.4 must be taken into account.
The tow hook must be suitable for the permissible load and be of a type approved by National Requirements.
Since tow hooks are important to vehicle driving safety (in some countries they must be
specifically certified) they must not be modified in any way.
When mounting the tow hook to the cross member, the specifications of the hook manufacturer as well as
the limitations imposed by current standards - such as minimum space required for the brake and electrical
connections the maximum distance between the swivel hook axis and the rear edge of the body - must be
respected.
This may vary depending on local regulations. In the European Community a maximum of 420 mm can be
reached. If higher values are required, check the EC Directive for the conditions to be able to accomplish this.
Should the dimensions of the hook coupling flange not match the holes on the rear cross member of the vehicle,
in some case drilling may be authorised on the cross member after mounting adequate reinforcements.
Ball Hooks
When fitting a ball hook IVECO will supply on request, information regarding the points at which the hook
structure can be connected to the chassis.
The carrier assembly must conform to current legislative norms and the work carried out will be the
responsibility of the bodybuilder. Upon request, IVECO will supply designs for the construction of carrier
assemblies specifically planned by IVECO.
2-24
Chassis modifications
Should assembly of a ball-type hook require modification to the underrun bar, such modification must not affect
the original stiffness and resistance specifications (local government regulations where these exist should be
complied with).
The bodybuilder must, upon request, submit the required documentation to prove compliance with the legal
regulations.
Choosing a Hook
When selecting the appropriatehook and for the use of reinforcements (where necessary) for the rear cross
member, the effect of the horizontal forces produced by the mass of the tractor and trailer must be taken into
account in accordance with the following formulas:
D = 9.81 x
TxR
(T + R) x 1000)
R=
T x D x 1000
(T x 9.81) - (1000 x D)
D = Representative value of the hook class (kN)
T = Maximummassoftractor,inkg.
R = Maximum mass of trailer, in kg.
2.5.2Increasing the Towable Mass
For those vehicles which IVECO regards as suitable for towing a trailer, a request may be submitted to
evaluate the possibility of authorising a towable mass exceeding that which is normally permitted.
Such authorisation will include the conditions that must be complied with and, where necessary, specifications
concerning modifications and work to be carried out on the vehicle.
Among these possible reinforcements to the standard equipment cross member (fig 2.16), instructions concerning
the installation of reinforced cross members if available and specifications concerning the braking system (e.g. the
addition of an air compressor with a greater capacity) will be included.
The tow hook must be suitable for the new use. Its connecting flange must match that of the cross member.
To fasten the cross member to the chassis frame, the same drilling scheme existing on the gusset plate should
be followed.
Flanged head screws and nuts or hex head screws of minimum class 8.8 of the next larger diameter with
self-locking nuts should be used.
Chassis modifications
2-25
2.5.3Lowered Rear Cross Member
If the type of trailer used requires that the tow hook be positioned lower than originally intended, IVECO
may issue authorisation for the original cross member to be lowered or for an additional cross member (of
the original type) to be fitted in a lower position. Figs. 2.13 and 2.14 give some examples of how this is done.
The installation of the new cross member in its new position must be carried out in the same manner as
originally, using the same type (diameter and class) of bolt.
Figure 2.13
1 Original rear cross member
2 Gusset
3Upside-downgusset
4 Connecting angle piece
The thickness of the outer reinforcing angles must not be less than the thickness of the side members of the
vehicle. They must cover a length which is at least 2.5 times the height of the side member itself (maximum 600
mm) and be made of material with the properties indicated in point 3.1.1. The angles are to be attached to the
web of the side members using all the bolts joining the cross member to the frame, integrating them with the
other bolts so that, as a result of their number and location, they will take into account the greater moment
transmitted. As a general rule, when the cross member is lowered by an amount equivalent to the height of
the side member, the number of bolts is increased by about 40%.
When an additional cross member is installed (see Fig. 2.14) a central joining plate with athickness
commensurate with that of the cross members, must be employed.
A device to prevent the bolts from loosening must be adopted for the joints.
2-26
Chassis modifications
Figure 2.14
Version for chassis with long overhangs
Version for chassis with short overhangs
SPACE FOR REAR
SPRING SUPPORT
1 Original rear cross member
2 Connecting angle piece
3 Connecting plate
4Gussetplate
5 Pressed steel channel sections (same size as chassis)
Assurance should be given that the movements between the tow bar and vehicle conform to current
regulations. As a general rule, the original towable mass can be confirmed by IVECO. In any event the
responsibility for the work carried out will rest with the bodybuilder.
The vehicle must be presented for inspection if local government regulations require it.
Fig. 2.13 illustrates one example of partial lowering of the cross member. Where the upper gusset plates of
the cross member is joined to it, ex-factory, with bolts, the plates can be inverted in the new positions in order
to allow the original holes in the side members to be used.
Chassis modifications
2-27
Fig. 2.14 shows an example of a lowered supplementary cross member.
esosoage()(oocass
)
autowabeass(g
)
p
p
)
120x55(G135op
p.G3)40
0
113
0
450
0
(G150G5950
247
0
950
0
G
5
100
0
296
0
12000
160x100G6
100
0
404
0
18000
)
3
3
3
When it is necessary to use this type of construction in vehicles with a short overhang (e.g. tipper) the external
connection angles must be suitably adapted at the rear suspension support. This may require dismantling of the
supports of the auxiliary leaf spring and its subsequent re-installation, when permitted by local regulations, or
the application of the version shown in figure 2.14. Should the brackets of the underrun bar be modified,
following the lowering of the rear cross member, the new version will be equivalent to the original in terms
of attachment, strength and stiffness and the positioning of the lights checked for compliance with the standards
(local standards where applicable).
2.5.4 Centre Axle Trailers (Rigid Towbar)
The use of trailers with centre axles (rigid tow bar trailers with single or tandem axles), with respect to
articulated tow bar trailers, entails an increase in bendingstressontherearchassisoverhangaswellasan
increased torsional stress of the rear towing cross member resulting from the vertical static and dynamic loads
which the tow bar exerts on the hook (for example when braking or on bumpy roads).
On those vehicles on which the towing of trailers is permissible within the values established for each model
by IVECO, the mass that may be towed with the centre axle trailer and the vertical loads on the cross member
indicated in table 2.3 may be authorised on the basis of the dimensions of the flange located on the vehicle cross
member.
In addition to this, where the overhang is relatively long, it may be necessary to fit an auxiliary frame with section
irons larger than those normally planned (see table 2.4).
If central axle trailers are to be used, the connection of chassis frame to subframe will be carried out from the
rear overhang to the front support on the rear suspension with cleat plates or by strengthening the existing
connections with shear-resistant reinforcing. For the vehicles with weight range from 65E to 150E having
bodywork longitudinal runners with thickness smaller than the value required in these instructions, the cleat
plates shall be further fitted beyond the wheelbase centreline.
The values indicated in table 2.3 however, are subject to confirmation on a case by case basis subject to the
conditions which will be specified in the authorisation, such as the use of the vehicle, the adoption of a suitable
braking system, the installation of a cross member with a greater capacity or reinforced, or of appropriate tow
hooks etc.
Table 2.3
Dimensions of flange (mm) (hook class)Max. vertical loads permitted on hook (kg)Maximum towable mass (kg)
StaticTotal load*
120x55(G135 o
140x80 (G140 opp. G4)90023409000
160x100 G6
* Indicative values according to standard ISO/TC22/SC15/WG4 Annex A adopting the formula: Fv = 3 . C . 0.6 + S
1 Permissible for vehicles of class ≥ 80E
2 Feasible with reinforced cross member and suitable tow hook
3 Feasible on some models of the heavy range with reinforced rear cross member and suitable tow hook
81 G5
700G61
.G3
40011304500
1
650
2
1000
3
1000
3
1000
1000
(static+dynamic)
1
1690
2
2960
3
4040
3
4400
5120
for centre-axle trailers
1
6500
2
12000
3
18000
3
20000
24000
2-28
Chassis modifications
The value of the maximum vertical load (static + dynamic load transmitted by the trailer to the towing hook)
is determined with the following ISO formula:
Fv = a ⋅ x
2/l2
⋅ C ⋅ 0,6 + S
Fv = Max vertica l load (static + dynamic) transmitted by the trailer to the tow hook (kN)
a= Vertical acceleration in the drawbar/towing hook coupling area; depending on the rear
suspension of the tractor for semitrailer, use the following values:
2
- a=1.8m/sec
- a=2.4m/sec
for vehicles with pneumatic suspension (or equivalent)
2
for vehicles with other suspension types
x= Total length in mms of the loading area of the trailer (m).
l= Length of the trailer wheelbase (distance between drawbar towing eye centre and axle
centre or trailer axle centre line) in m.
C = Total mass of the trailer (in tons) the S static support load excluded.
S= Static support load (kN)
0,6 = Deceleration factor
Figure 2.15
Chassis reinforcement for central axle trailers adopting the
combined reinforcement solution (Fig. 3.4)
1 Combined reinforcement
2 Shear resistant connections
3 Auxiliary frame longitudinal runner
4 Vertical load on tow hook
Chassis modifications
2-29
Table 2.4
W
heel
Rear
Longitudinal runner profiles of the subframe for central axle trailers
MODELS
(Chassis section) (mm)
ML 60(180,5x65x4)
ML 60/P(180,5x65x4)
ML 65(180,5x65x4)
ML 65/P(180,5x65x4)
ML 65H(182,5x65x5)
ML 75(180,5x65x4)
ML 75/P(180,5x65x4)
ML 80(203x65x4)
ML 80/P
ML 80/FP
ML 85H(203x65x4)
ML 95W
ML 100W
ML 100(203x65x4)
ML 100/P(205x65x5)
ML 110EL
ML 120EL
ML 110EL
ML 120EL
ML 110EL/P
ML 120(250x70x5)
ML 120/P
ML 120/FP
(182,5x65x5)
(182,5x65x5)
(182,5x65x5)
(182,5x65x5)
(182,5x65x5)
(182,5x65x5)
(205x65x5)
(203x65x4)
(205x65x5)
(205x65x5)
(250x70x5)»3240
(205x65x5)
6)
(205x65x5)
6)
(207x65x6)
6)
(205x65x5)
(207x65x6)
(252x70x6)
(253,4X70X6,7)
(255,4X70X7,7)
(250x7x5)
(252x70x6)
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base
(mm)
2700
3105
3330
3690
4185
4455
4815
3690
4185
4455
4815
2700
3105
3330
3690
4185
4455
4815
3690
4185
4455
4815
2700
3105
3690
4185
3105
3330
3690
4185
4455
4815
3690
4185
4455
4815
2700
3105
3330
3690
4185
4455
4815
3690
4185
4455
4815
3105
3690
4185
4455
3690CC
2700
3105
3330
3690
4185
4455
4815
4185
4455
4815
3105
3330
3690
4185
4455
4815
3690
4185
4455
4815
3105
3690
4185
4455
4815
5175
5670
6570
5175
5670
6570
4185
4455
4815
5175
5670
6570
Cab
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
C
C
C+L
C+L
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
C
C+L
C+L
C+L
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
C+L
C+L
C+L
-
-
-
-
-
-
overhang
(mm)
1290
1313
1830
1830
2145
2280
2505
1830
2145
2280
2505
1290
1313
1830
1830
2145
2280
2505
1830
2145
2280
2505
1290
1313
1830
2145
1313
1830
1830
2145
2280
2505
1830
2145
2280
2505
1313
1313
1830
1830
2145
2210
2505
1830
2145
2210
2505
1313
1830
2145
2280
1042
1358
1313
1313
1830
1830
2145
2280
2505
2145
2280
2505
1313
1830
1830
2145
2280
2505
1830
2145
2280
2505
1313
1740
2055
2190
2460
2685
3000
3495
2685
3000
3495
2055
2190
2460
2685
3000
3495
Trailer load (R) & static drawbar load (S) of the central axle trailer (kg)
R ≤ 4 500
S ≤ 400
Minimum value of subframe section modulus Wx (cm3) as a function of the yie ld point of the
material (N/mm2)
Minimum value of subframe section modulus Wx (cm3) as a function of the yie ld point of the material (N/mm2)
Fe360=240Fe510=360
A
A
A
A
A
74
A
A
74
A
74
105
A
105
208
105
208
245
A
A
A
A
A
A
A
A
A
A
105
105
R ≤ 12 000
S ≤ 1 000
A
A
A
A
A
57
A
A
A
57
A
74
A
A
A
A
A
74
A
A
A
74
A
135
A
A
A
135
74
208
A
135
74
208
89
286
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
135
A
135
A
A
A
A
A
A
A
A
A
A
A
A
A
A
74
A
74
105
A
A
A
A
A
A
A
A
A
A
A
A
R ≤ 14 000
S ≤ 1 000
A
A
74
A
74
89
A
A
89
A
89
135
A
135
245
135
245
286
A
A
A
A
A
A
A
A
A
A
135
135
A
A
A
A
A
A
A
A
A
A
A
A
A
A
74
A
74
135
A
A
A
A
A
A
A
A
A
A
A
A
R ≤ 16 000
S ≤ 1 000
A
A
74
A
74
105
A
A
105
A
105
150
A
135
245
135
245
317
A
A
A
A
A
A
A
A
A
A
135
135
A
A
A
A
A
A
A
A
A
A
A
A
A
A
74
A
74
135
A
A
A
A
A
A
A
A
A
A
A
A
R ≤ 18 000
S ≤ 1 000
A
A
A
A
74
A
A
A
74
A
135
A
A
A
57
A
135
A
57
A
135
A
150
A
A
A
150
A
245
89
150
A
245
89
317
135
A
A
A
A
A
A
A
A
A
A
A
A
46
A
46
A
A
A
A
A
150
A
150
A
4)
R ≤ 20 000
S ≤ 1 000
A
A
89
A
89
135
A
74
135
74
135
173
A
150
2145
150
245
343
A
A
A
A
A
A
74
74
AA
A
150
150
A
A
A
A
A
A
A
A
A
A
A
57
A
A
89
A
89
135
A
A
A
A
A
A
A
A
A
A
A
A
4)
R ≤ 22 000
S ≤ 1 000
A
A
A
A
105
A
A
A
105
A
150
A
AA
A
74
A
135
A
74
A
135
A
173
74
A
A
150
A
286
105
150
A
286
105
343
150
A
A
A
A
A
A
A
A
AA
A
A
A
74
A
74
A
A
A
A
A
150
A
150
A
4)
R ≤ 24 000
S ≤ 1 000
A
A
105
A
105
150
A
74
150
74
150
208
A
150
286
150
286
374
A
A
A
A
A
A
74
74
A
A
150
150
A
A
A
A
A
A
A
A
A
A
A
74
A
46
105
46
105
150
A
A
A
A
A
A
A
A
A
A
46
46
4)
Notes: see page 2-41.
2-40
Chassis modifications
Table for selection of runner profiles (see Table 2.4)
(seeFig.2.15)
Recommended section
(or other section with equal
Section modulus Wx (cm3)
1680x50x4135200x80x7
1980x50x5150200x80x8
2180x60x5173220x80x8
31100x60x5208250x80x8
36100x60x6245250x100x8
46120x60x6286280x100x8
57140x60x6317300x100x8
74140x70x7343320x100x8
89160x70x7374340x100x8
105180x70x7406360x100x8
119200x80x6474400x100x8
A = The chassis runner profile designed for the relevant body is sufficient ( e.g. table 3.1 for normal bodies)
C = Normal (short) cab
L=Longcab
E = To be checked case by case
1) = Use runners with greater section modulus when the body requires it (e.g. table 3.1)
2) = For modelsof class ML60, ML 65 and ML75, possible onlyafter fitting a suitablefinal crossmember andan appropriate towingdevice (modification
of chassis end).
3) = For models of class ML 95W, ML 100W, ML 120, ML 130, 135W, ML 140W and ML 150, possible only if fitting a sturdier final cross member
and an appropriate towing device. For models ML 150 E27, ML 170 and ML 180, possible up to 9,000 kg using a standard cross member.
4) = For towing central axle trailers featuring high overall mass, particularly in the case of vehicles fitted with a long rear overhang, we recommend
that a proper rear cross member be installed in a lowered and forward position (next to the rear suspension rear mountings) in consideration
of the high stress exerted on the chassis and the dynamic forces affecting the tractor (load reduction on the front axle).
5) = Should the height of the runner profile be reduced using shear resistant connections, combined section runner profiles can be adopted instead
of the specified channel profiles (moment of resistance indicated on table 2.4). Combined section runner pro files can be used (see table below)
on condition that flange width and thickness dimensions are not smaller than the corresponding values tabulated on the runner profile section
table.
These are instructions of a general nature applying to the materials covered by this manual. Materials with higher mechanical specifications call
for the measurement of the overall chassis and subframe bending moment.
However, we recommend that minimum specified values of reinforcement sections for the different types of equipment be observed (for
example, see table 3.1 for standard bodies).
6) = In the MLL version, use a section with W min no less than 57 cm
moment of inertia and resistance)
(C-shaped section) (mm)
5)
Section modulus Wx (cm3)
3
.
Recommended section
(or other section with equal
moment of inertia and resistance)
(C-shaped section) (mm)
Material yield point (N/mm2)≤ 320≤ 320≤ 240≤ 240≤ 360≤ 360
Max. runner profile height
reduction (mm):
Combined reinforcements length
(see Fig. 2.15)
LV:
L
:
H
Example: Combined section as an
alternative to the channel section
C250x80x8 (mm)
Actual height reduction (mm):
The continuity of combined reinforcement runners can be interrupted only in special cases and is subject to authorisation. Similarly, when it is difficult
to apply an external reinforcing L section (items F and G figure 3.4) - owing to the presence of suspension mountings or air spring connection brackets
- and the recessing to be performed could excessively reduce the section’s resisting capacity, the adopted solution will require special authorisation.
4060100120100120
0,5.L
U
0,6.L
U
210x80x8190x80x8150x80x8
4052859792104
0,5.L
0,6.L
U
U
0,8L
U
0,95L
U
+ straight
section 15x80
0,85L
U
1,0.L
U
130x80x8
+ straight
section15x80
0,8.L
U
0,95.L
U
150x80x8
+ angle section
0,85.L
1,0.L
130x80x8
+ angle section
U
U
Chassis modifications
2-41
Central axle trailers: towing cross member in lowered and forward positions
(short coupling)
Vehicles designed to tow central axle trailers for which a final cross member located in a lowered or forward
position (next to the rear suspension rear mountings or air springs) is evisaged, do not require particular chassis
reinforcing devices. For the subframe, the runner profile dimensions indicated for the different types of
equipmen t (e.g. see table 3.1 standard bodies) will be sufficient. The bodybuilder will accurately work out the
size and position of the chassis connection structure (see items 2.21 and 2.5.3 and 2.15.3) and make use of a
suitable cross member and an appropriate towing hook.
The tow hook position will be such to permit any movement between tractor and trailer drawbar according
to the various conditions of use, to comply with the required safety margins and the standards and legal
regulations in force (where applicable). In these cases the standard underrun bar cannot be used, and the
bodybuilder will investigate the possible permitted departures from specifications or the specific solutions to
adopt (e.g. underrun bar of the tilt type).
Reinforcement of Standard Rear Cross Member
When it is necessary to reinforce the standard cross member and when original cross members are not
available, the bodybuilder will provide suitable reinforcements for which he shall be responsible.
These reinforcements may consist of C-sections mounted on the inside of the cross member. Care must be
taken to ensure that the connections between the cross member and the side members are also reinforced
following the procedures recommended below, whenever stronger enforcements are required:
2-42
Chassis modifications
1) The mounting of a channel section on the inside of the cross member and joining it to the vertical web of
the side member or to the following cross member of the chassis, if it is situated in close proximity, in
compliance with the procedures illustrated in Fig. 2.16.
Figure 2.16
1 Original cross member
2 Reinforcing rail
3 Connecting angle pieces or plates
2) Mounting a box section of suitable dimensions underneath the cross member, anchored at
the extremities to the vertical web of the side members and joined at the centre of the cross member as
shown in Fig. 2.17.
In vehicles with a short rear overhang, and when auxiliary frame used (e.g. tippers or vehicles having the
underrun bar device located below chassis longitudinal member lower flange), the box-section may be
mounted on the inside of the sections of the auxiliary frame above the cross member and connected to
it by means of a plate, as shown in fig. 2.14.
Should box-section assembly require modification to underrun bar plates the original requirements for
fastening, resistance and stiffness must be met (comply with local government regulations if any).
Chassis modifications
2-43
Figure 2.17
1 Original rear cross member
2Boxsection
3 Connecting plate
4 Ribbing plate
Tow hooks for Central Axle Trailers
The use of central axle trailers implies the use of tow hooks suitable for this purpose.
The values of the trailer loads and of the permissible vertical loads are contained in the technical documentation
of the manufacturer of the tow hook or on the production data plate (e.g. DIN 74 051 and DIN 74 052).
There are also tow hooks with special type approval, whose values are greater than the ones mentioned in the
above standards. These hooks may in any case be subjected to restrictions depending on the trailers used (e.g.
drawbar length). In addition to this they can imply that the rear cross member should be further reinforced
and a subframe runner of larger size be fitted.
Remarks about the Payload
It should be ascertained that the static drawbar load does not cause the allowable load on the rear axle or
axles to be exceeded and that the required minimum load acting on the front axle is adhered to (see point 1.2.1).
2-44
Chassis modifications
2.6Installing a Supplementary Axle
General Specifications
On certain models IVECO authorises, upon request, the installation of a supplementary axle and,
consequently, an increase in the total mass of the vehicle.
The modification must respect the mass limitations and the conditions imposed by IVECO as well as all other
conditions that may be imposed by national laws and such that are necessary to ensure the safety and proper
functioning of the vehicle.
Diagrams of the installation procedure may be submitted for inspection. These proposals must indicate the
parts necessary to connect the axle to the chassis as well as the reinforcements to, and modifications of the
chassis.
The specifications given in points 2.2 and 2.3 are to be followed for all modifications of the chassis.
In view of the increased stresses due to the increase in permissible load, and in consideration of the different
phases of the dynamic stresses in operation as a result of the different reactions on the chassis when the axle
is added, it is necessary to provide appropriate reinforcements to the chassis.
These reinforcements must in all cases satisfy all provisions of local applicable laws. The chassis that has thus
been modified must not be subject to flexural stresses greater than those of the original chassis in the
corresponding sections.
Figure 2.18
1 Bracket
2Plate
3 Screws, rivets or dia. 20 to 30 mm holes to be filled with welding.
Chassis modifications
2-45
Chassis Frame Reinforcement
Fig. 2.18 illustrates possible ways of modifying the chassis. The reinforcements must be continuous and must
span the length of the entire frame of the vehicle up to the driver’s cab. For their attachment to the side member
- when using L-bars - class 8.8 rivets or reinforcement bolts must be used and their diameter and distribution
must be such to enable the section iron to provide the required strength.
Where an auxiliary frame is required as reinforcement (see point 3.1), the body mounting brackets on the
chassis (if any) should be used for the attachment. An alternative method of attachment is shown in section
3.1.2 and those that follow it.
We recommend using a shear resistant connection in the area of the rear overhang up to approximately the
mid wheelbase (in any case up to no more than 2 m from the front axle) (see fig. 2.19).
The fitting of reinforcing plates directly onto the flanges of the side members, using holes filled with welded
material is not permitted. This is to avoid affecting the strength of the original sections caused by poor welding.
This procedure is only permitted in special cases with specific IVECO authorization when there are proven
difficulties in subsequent body applications.
The reinforcement on the chassis can be omitted provided the following static stress values are not exceeded:
Models
ML 60 ÷ ML 170; ML 260KE12080
MP 180 ÷ MP 410H150100
Static stress admitted on chassis (N/mm2)
on roadoff road
Any limitations, imposed by national laws must be complied with.
If the fitting of such reinforcement is unavoidable, then because of the deterioration of the characteristics of
the material following welding, in measuring the stressinthevarioussectionsitisnecessarytoassumea
reductioninthecharacteristicsofthe material by approximately 15%.
As a general rule the thickness of the reinforcing plate must not exceed that of the flange of the original chassis.
The mounting must be carried out by skilled personnel and the bodybuilder will be responsible for any damage
to the frame resulting from poor workmanship.
Installing a Rear Supplementary Axle
The installation of a rear supplementary axle generally implies that the chassis overhang should be
lengthened, the extension must be carried out in compliance with the specifications given in point 2.4.2. relating
to the modifications of the chassis, leaving the reinforcements mentioned above unaffected.
When an additional axle is added to the overhang with a section depth smaller than the depth within the
wheelbase area the adjustment of the section to give a higher value could be a solution towards reducing the
stress arising from the conversion.
2-46
Chassis modifications
Fig. 2.19 shows an example of the installation of a rear axle with an extension of the rear overhang.
Figure 2.19
1 Added supplementary axle
2 Extension to the overhang
3 Reinforcements for the modification of the chassis
4 Connections
5 Reinforcing runner
Chassis modifications
2-47
Application of the third rear axle for EuroCargo TECTOR
For models EuroCargo Tector ML150E.. and ML180E.., option 4667 (arrangement for application of the
third rear axle) is available. This provides vehicles built with specific components (e.g. four-channel ABS control
unit, axle combined brake cylinder, ABS electropneumatic valve, etc.).
Installation of a third axle to vehicles not built with option 4667 must be carried out according to the indications
of the diagrams below:
DIAGRAM — BRAKING SYSTEMS WITH OPTION 4667
(It is recommended that the axle solenoid valves are inserted in such a way that one solenoid valve controls
the right wheel of the driving axle and additional axle, and the other controls the left side)
1. Quick-discharge valve or proportional reduction valve 1:1,5 (optional) — 2. Axle membrane brake cylinder (type 18
with R 19.5 tyres; type 20 with R22.5 — R20 tyres — 3. Knorr SB6 axle disc brake, ∅ 377 mm, braking surface: 301 cm
per wheel — 4. ABS electropneumatic valve — 5. Self-limited, Knorr DX65 7.6 bar brake control Duplex distributor (**)
— 6. Parking brake safety valve (optional) — 7. Self-limited, 7.5 bar parking brake control hand distributor — 8. 6.5 bar low
pressure indicator switch — 9. Single-control servodistributor — 10. Quick-discharge valve (optional) or single-control
servodistributor (optional) — 11. Combined brake cylinder (type 14/7300 with R 19.5 tyres; type 16/7900 with R22.5
— R20 tyres — 12. Rear axle drum brake - ∅ 360 mm, width: 170 mm, braking surface: 988 cm
jaw control wedge: 12° - 13. Services safety valve (optional) — 14. Axle air tank (15 l) — 15. Rear axle air tank (15 l) —
16. Manual condensate drain valve — 17. A.P.U. (Drier with 11 bar regulator — Four-way 7.5/6.5 bar protection valve)
Knorr ZB45 (**) LA81 (**) AE46 (**) — 18. Single-cylinder compressor, 225/359 cm3compressor revs/engine ratio —
19. Pressure control takeoff — 20. Knorr anti-lock electronic control unit (types0 486 104 or B 486 104 072 — 21.Electric
pressure gauge — 22. Pneumatic pressure gauge for 6.5 bar low pressure indicator switches — 23. Stop lights — 24. Parking
brake luminous indicator — A. To the pneumatic suspension system — B. Services.
(**) The numeric characters that come after the code refer to features not essential under braking directives.
1. Quick-discharge valve or proportional reduction valve 1:1,5 (optional) — 2. Axle membrane brake cylinder (type 18
with R 19.5 tyres; type 20 with R22.5 — R20 tyres — 3. Knorr SB6 axle disc brake, ∅ 377 mm, braking surface: 301 cm
per wheel — 4. ABS electropneumatic valve — 5. Self-limited, Knorr DX65 7.6 bar brake control Duplex distributor (**)
— 6. Back-pressure valve — 7. Parking brake safety valve (optional) — 8. Parking brake control hand distributor (optional)
— 9. 6.5 bar low pressure indicator switch — 10. Trailer brake control servodistributor, Knorr AC597 (**) WABCO 937
009 (**) pred. 0.2 bar — 11. Combined brake cylinder (type 14/7300 with R 19.5 tyres; type 16/7900 with R22.5 — R20
tyres — 12.Rear axle drum brake - ∅ 360 mm, width: 170 mm, brakingsurface: 988 cm
2
per wheel, full angle of jawcontrol
wedge: 12° — 13. ISO trailersemicoupling —14. Single-control servodistributor — 15. Pressure control takeoff— 16. Trailer
pressure reductor, 8.5 bar — 17. Services safety valve (optional) — 18. Low pressure indicator switch, 6.5 bar (optional)
— 19. Trailer + springs air tank (15 l) — 20. Axle air tank (20 l) — 21. Rear axle air tank (20 l) — 22. Manual condensate
drain valve — 23. A.P.U. (Drier with 11 bar regulator — Four-way 7.5/6.5 bar protection valve) Knorr ZB45 (**) LA81
(**) AE46 (**) — 24. Single-cylinder compressor, 225/359 cm
3
compressor revs/engine ratio — 25. Pressure control takeoff — 26. Knorr anti-lock electronic control unit (types 0 486 104 or B 486 104 072) — 27. Trailer services low pressure
luminous indicator (optional) — 28. Electric pressure gauge — 29. Low pressure indicator switch pneumatic pressure
switch, 6.5 bar — 30. Stop lights — 31. Parking brake luminous indicator — A. To the pneumatic suspension system — B.
Services.
(**) The numeric characters that come after the code refer to features not essential under braking directives.
—3.KnorrSB6axlediscbrake,∅ 436 mm, braking surface: 392 ÷ 408 cm
per wheel — 4. ABS electropneumatic valve
— 5. Self-limited, Knorr DX65 7.6 bar brake control Duplex distributor (**) — 6. Parking brake safety valve (optional) —
7. Self-limited,7.5 bar parking brake control hand distributor— 8. 6.5 bar low pressure indicator switch — 9. Single-control
2
servodistributor — 10. Rear axle drum brake - ∅ 381 mm, width: 178 mm, brakingsurface: 1,400 cm
per wheel, full angle
of jaw control wedge: 12° — 11. Rear axle combined brake cylinder, type 12/720 — 12. Services safety valve (optional)
— 13. Axle air tank (20 l) — 14. Rear axle air tank (20 l) — 15. Manual condensate drain valve — 16. A.P.U. (Drier with 11
bar regulator — Four-way 7.5/6.5 bar protection valve) Knorr ZB45 (**) LA81 (**) AE46 (**) — 17. Single-cylinder compressor, 225/359 cm
3
compressor revs/engine ratio — 18. Pressure control takeoff — 19. Knorr anti-lock electronic control unit (types 0 486 104 or B 486 104 072 — 20. Electric pressure gauge — 21. Low pressure indicator switch pneumatic
pressure switch, 6.5 bar — 22. Stop lights — 23. Parking brake luminous indicator — A. To the pneumatic suspension system
— B. Services.
(**) The numeric characters that come after the code refer to features not essential under braking directives.
1. Quick-discharge valve or proportional reduction valve 1:1,5 (optional) — 2. Axle membrane brake cylinder, type 22
2
—3.KnorrSB6axlediscbrake,∅ 436 mm, braking surface: 392 ÷ 408 cm
2
mm, braking surface: 384 cm
per wheel — 4. ABS electropneumatic valve — 5. Self-limited, Knorr DX65 7.6 bar brake
per wheel; Bendix axle disc brake, ∅ 430
control Duplex distributor (**) — 6. Back-pressure valve — 7. Parking brake safety valve (optional) — 8. Parking brake control handdistributor (limit.8.5 bar) — 9. 6.5 bar lowpressure indicator switch— 10. Trailerbrake control servodistributor,
Knorr AC597 (**) WABCO 937 009 (**) pred. 0.5 bar — 11. Rear axle drum brake - ∅ 381 mm, width: 178 mm, braking
surface: 1,400 cm
2
per wheel, full angleof jaw control wedge: 12° — 12. ISO trailer semicoupling — 13. Rear axle combined
brake cylinder, type 12/20 — 14. Single-control servodistributor — 15. Trailer pressure reductor, 8.5 bar — 16. Services
safety valve (optional) — 17. Low pressure indicator switch, 6.5 bar (optional) — 18. Trailer + springs air tank (15 l) — 19.
Axle air tank (20 l) — 20. Rear axle air tank (20 l) — 21. Manual condensate drain valve — 22. A.P.U. (Drier with 11 bar
regulator — Four-way 7.5/6.5bar protection valve) KnorrZB45 (**) LA81 (**) AE46 (**) —23. Single-cylindercompressor,
225/359 cm
3
compressor revs/engine ratio — 24. Pressure control takeoff — 25. Knorr anti-lock electronic control unit
(types 0 486 104 or B 486 104 072) — 26. Trailer serviceslow pressure luminous indicator (optional)— 27. Electricpressure gauge — 28. Low pressure indicator switch pneumatic pressure switch, 6.5 bar — 29. Stop lights — 30. Parking brake
luminous indicator — A. To the pneumatic suspension system — B. Services.
(**) The numeric characters that come after the code refer to features not essential under braking directives.
Chassis modifications
2-51
Installing an Intermediate Supplementary Axle
The installation of an additional axle in a forward (intermediate) position relative to the drive axle may
require a possible reduction in the rear overhang (see point 2.4.1.) in order to obtain the proper distribution
of the weights (see Fig. 2.24).
Figure 2.24
1 Added supplementary axle
2 Reinforcing runner
3 Connections
4 Reduction in the rear overhang
Steering Axles
Steering axles can be installed both intermediately and at the rear. They can be of the self-steering or
force-steering types and be designed and installed in such a way that the required dependability and road safety
are guaranteed. The self-steering axles will be fitted with a device controlled from the driver’s seat which is
able to render them rigid when reversing.
The installation of an axle whose force-steering is obtained by means of the original steering system of the
vehicle requires specific authorisation from IVECO in relation to the suitability of the original components for
the conversion in question. In this case, it will be necessary for diagrams of the supplementary system to be
submitted for our inspection.
Components and Suspension
Manufacturing quality of all components used (axle, suspension, braking units, systems etc.) must be ensured
in order to guarantee driving safety and good vehicle operation.
Particular care and attention must be paid to the designing and construction of the suspension in consideration
of its importance for the proper performance and handling of the vehicle on the road.
The designed suspension may be either of the mechanical leaf-spring type, pneumatic with air actuated springs
or of a mixed type. Whatever type is used it must not negatively affect the handling characteristics of the vehicle
and its components in terms of driving quality, comfort, road holding, working angle of the transmission and
its working space in the case of an intermediate supplementary axle.
2-52
Chassis modifications
The use of a compensating suspension, in particular off-road vehicles whether constant total or partial, is to
be preferred because of its ability to maintain the load distribution on the two rear axles. Thus ensuring that
both axles are able to react to both static and dynamic loads in the manner contemplated by the builders and
in compliance with the regulations in force where applicable (e.g. axle misalignment).
Where the additional axle has its own independent suspension, the suspension characteristics must be
proportional to those of the original rear suspension in relation to the static loads applied to the two axles.
Stabilisers
When pneumatic suspension is used for the added axle, depending on the solution adopted, it may be further
necessary to fit a antiroll bar in particular when a body with a high centre of gravity is used.
Similar devices must be adopted with mixed suspension on supplementary axle installations to ensure stability
when tipper bodies are fitted and it is important that the specifications detailed in section 3.4. are adopted.
Connection to the Chassis Frame
The connections of the added axle to the chassis must be such as to be able to withstand all longitudinal
and transverse stress forces without transmitting them to the drive axle.
At the points in which the forces are introduced (spring supports, air spring brackets etc.), appropriate cross
members or suitable frame reinforcements must be provided.
Ensure that the added axle is at right angles and aligned properly in relation to the longitudinal axis of the vehicle
and the live axle. Check using the appropriate equipment available in the market.
Braking System
The braking system, considering its importance relative to the active safety of the
vehicle, must be extremely well developed and constructed.
Braking units, hoses and joints of the same type as on the original vehicle must be used.
Whenever possible the auxiliary axle should be equipped with the same brake components as those provided
for the front axle.
Use flexible pipes to form the connection between the fixed parts (chassis) and moving parts (axles).
The braking torque must be proportional to the static and dynamic loads in order to provide an even
distribution of the braking action to all the axles of the vehicle.
The total braking capacity of the modified vehicle must, as a general rule, be proportional to that of the original
vehicle, allowing for the different total mass that is now applicable. The performance of the braking system
(service, emergency and parking) must in all cases satisfy the current government regulations in terms of
deceleration, behaviour when hot, response time, efficiency of engine braking and so forth.
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2-53
If the Technical Control Authority demands that the technical documentation regarding the braking system be
submitted (e.g. adhesion curves, compatibility range diagram) this must be provided by the company in charge
of the conversion or the the manufacturer of the auxiliary axle.
Upon request, technical documentation with characteristics and attainable performances of the braking system
of the original vehicle may be made available.
For the construction of the braking circuit for the additional axle it is advisable to employ equipment and circuits
specially provided for each single model by the Manufacturer of the equipment in use on the original vehicles.
These circuits also determine the dimensions of the tubing to be used and the required capacity of the air
cylinders. When the additional axle is equipped with independent suspension, a good solution is to design an
independent circuit with adequate load apportioning valve, to be protected by a system pressure valve and
controlled by the brake circuits of the front and rear axle through a relay valve. It should be borne in mind that
the solution must not alter the balance of response times and pressures in the original circuits.
Arrangements are also permitted whereby the direct connection is achieved between the braking sections of
the added axle and that of the live axle. It should be ascertained that the capacity of the air reservoir is adequate
to the size of the additional brake cylinders. If necessary an additional air reservoir should be installed.
Current government regulations regarding emergency and parking brakes must be respected. We recommend
that the parking brake be constructed to act on the added axle as well.
Warning
For general instructions concerning both the braking system and the anti-lock brake system (ABS) for those
vehicles equipped with such systems, refer to point 2.14.
For the electrical system, follow the instructions given at point 2.15.
Raise Device
The additional axle may be equipped with a raise device and may also be used in specific cases where
permitted by government regulations, to increase the adhesion of the drive axle to the ground under certain
conditions (starting uphill, slippery or snow/ice covered roads) provided that:
-this modification is made conditional to the issue by IVECO of a permit in which the maximum permitted
load on the overloaded axle is specified.
-the device is used only for driving short distances for the uses stated above, and at the maximum speed set
down on the specific authorization.
Some national regulations permit the use of the raise device at normal speeds provided that the homologated
maximum load established for the drive axle is not exceeded.
In such cases the indications given in point 1.2.2 should be heeded concerning the centre of gravity of the body
plus the payload.
Approval of and Responsibility for the Operations Carried Out
Following conversion, the vehicle will be submitted to local authority technical control for
approval (e.g. single inspection or type approval).
The authorisation given by IVECO to install an auxiliary axle and the passing of the approval inspection do not
free the bodybuilder/converter from responsibility for the conversion in question, or its effect on the vehicle
For the added assemblies, the required service or maintenance operations with relevant schedule, consistent
with the operations and relevant schedule planned for the original vehicle must be defined and entered in the
specific documentation.
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Chassis modifications
2.7Work on the Suspension
Company authorisation must be obtained to re-work the suspension systems and springs (e.g.
additional spring leaves, different cambering etc.) since these are important components for the
operationofthevehicle.
As a general rule no modification of the parabolic springs is permitted. On vehicles equipped with these springs,
installation of elastic rubber components may be authorised for special versions or uses in order to increase
the stiffness of the suspension. In very specific cases, and for specific uses, the possibility may be evaluated of
adding an extra leaf to the parabolic spring. This operation should be carried out by a specialised firm following
approval by IVECO.
The use on the same axle of one parabolic spring and one trapezoidal spring is not allowed.
In vehicles equipped with load apportioning valve (LAV) for the braking system, modification of the rear
suspension requires adjustment of the compensator (see point 2.14.5).
2.7.1Changing a Mechanical Suspension into a Pneumatic or Mixed Suspension
Modifications of this kind are generally authorised for the rear axle only. Modification proposals presented
by bodybuilders to the Company may be examined upon submission.
The responsibility for thedimensions of the air actuated springs and theirinstallation, for the counteracting bars,
the effectiveness of the suspension and their effect on the behaviour of the vehicle and the pneumatic supply
system rests solely with the firm that has carried out the modification. Suspension and anchoring components
are very important to vehicle safety so that the firm carrying out the modification must undertake the necessary
design and testing.
On vehicles which are equipped with a load apportioning valve , this must be replaced with a pneumatically
controlled LAV actuated by the pressure of the air in the springs. It must be calibrated in order to create the
same braking performance in relation to the load on the axle, as that on the original vehicle. The bodybuilder
must ensure that the respective values are indicated on the plate made for that purpose.
The auxiliary air tank for the suspension must be connected to the circuit of the vehicle in compliance with the
specifications given in point 2.14.4.
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2-55
2.8Modification of the Engine Air Intake and Exhaust Systems
Modification which would alter the characteristics of the air intake and exhaust systems may not be carried
out without prior authorisation.
Any work done must not alter the existing vacuum values of the intake or the exhaust back pressure.
The routing of the tubing must be as even as possible. Bends must not have an angle of over 90° and the radii
should not be lower than 2.5 times the external diameter. Avoid kinks and use cross-sections which are no
smaller than those corresponding to the original system. Any connections on the intake duct must guarantee
resistance of the tube to penetration by water or dust.
Sufficient clearance should be maintained (min. 150 mm) between the exhaust pipe and the electrical system,
plastic hoses, the spare wheel etc. Lower values (e.g. 80 mm) may be permitted if suitable sheet metal shielding
is used. Further reductions require the use of heat insulation and t he substitution of the plastic tubes with steel
pipes.
Any work done on the exhaust system of the vehicle requires that the vehicle be homologated again with regard
to noise and smoke wherever government regulations require it.
The air intake must be positioned to avoid the intake of hot air from the engine and/or of dusty air or snow
and rain. The apertures for the intake of air which may have to be made in the bodies of vans, must have a
working surface of not less than two and a half times that of the master hose located upstream of the filter.
These apertures (e.g. openings in the grill) must be of such a dimension that they do not become obstructed
.
It is not permissible to modify or substitute the original air filter or exhaust system without prior consent from
IVECO. Modifications to the equipment (fuel injection pump, regulator, injectors etc.) are not permissible as
this may alter the correct functioning of the engine and adversely affect the emissions of gases from the exhaust.
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Chassis modifications
2.8.1Vertical Exhaust
Apart from the general matters discussed in the above point, ensure that:
-The exhaust is far enough away from the inlet area.
-A suitable supporting structure duly braced and fixed to the vehicle chassis, is made for the vertical section
of the pipe.
-A section of flexible hose is fitted to free the silencer elastically from the rest of the added pipe.
- Arrangementsaremadetopreventthedirectentry of water into the end part of the pipe.
-Fig. 2.25 shows two examples of possible systems: one with a silencer in the area of the chassis frame and
the other with a silencer in a vertical position behind the cab.
Figure 2.25
On vehicles fitted with a vertical silencer (typically used on four axle vehicles) the silencer support bracket
should be bolted to the chassis using the nuts provided on the bracket. On models with 12.00R24 tyres the
spacing between the fixings on the bracket is greater and both fixings must be used. Where the sidemember
is less than 190mm in depth the upper connection must be made using a bracket bolted to the subframe.
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2-57
2.9Modifications of the Engine Cooling System
As a general rule, the proper functioning of the cooling system designed by IVECO, especially in connection
with the radiator, the free surface of the radiator and hoses (dimensions and layout) must not be tampered
with. Whenever modifications must be made which entail work on the cooling system (e.g. modification to the
driver’s cab), the following points must be considered:
-The useful area for the passage of air for the cooling of the radiator must not be less than that which is
available on vehicles with the standard cab. Maximum venting of air from the engine compartment must be
ensured and care must be taken - possibly using shields or baffles - to avoid stagnant air pockets or back
flow of air. The performance of the fan must not be altered as this affects the original design.
-If it is necessaryto re-position the hoses this must be done without affectingthe complete filling of the system
(which must occur at a continuous flow of 8 to 10litres/min. without forming blockages at the mouth) or
the normal flow of water. The maximum stabilising temperature of the water must not bealtered even under
the most severe operating conditions.
-Hoses must be located so that air pockets are not formed (i.e. avoiding siphonings and providing appropriate
bleeding points) that could hinder the circulation of water. Check therefore, that the p riming of the water
must not pump, when the engine is first started and subsequently running at the lowest speed, is
instantaneous even when the circuit is not pressurised. Accelerate briefly if necessary. In addition to this
check that the delivery pressure of the water pump, when the engine is running under no load and at
maximum RPM, is not lower than 1 bar.
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Chassis modifications
2.10 Installation of a Supplementary Heating System
When the installation of a supplementary heating system is deemed necessary, it is advisable to use the types
recommended by IVECO.
For vehicles on which IVECO has not anticipated the use of supplementary heaters, the installation should be
carried out in compliance with the supplier’s instructions (i.e. heater arrangement, piping, electrical system etc.)
and following the directions given below.
All national rules and regulations relevant to the matter should be adhered to (i.e. inspections, particular
installation for dangerous cargo transportation etc.). The supplementary heating system must not make use
of the equipment which is specific to the vehicle which is subject to approval if the use is liable to impair or alter
the performance of the equipment.
Furthermore:
-Ensure correct operation of the vehicle components and equipment (i.e. cooling system).
-Check the electrical system to ensure that the battery capacity and alternator output is sufficient for the
higher current requirements (see point 2.15). Provide the new circuitry with a protection fuse.
-Connect the intake of the newly added fuel system to the reservoir connected to the engine fuel return line.
Direct feed from the vehicle fuel tank is permitted only if this is independent from the engine fuel system
and the new circuit is perfectly leakproof.
-Trace pipe and cable paths, the location of brackets and hoses bearing in mind that the overall dimensions
and heat affect the various units on the chassis. Avoid runsand arrangements that could lead to hazards when
the vehicle is running. Use shields or armouring if necessary.
-When, installing a water heater, original vehicle heating and engine cooling circuits are involved (see point
2.9), it is advisable to follow the instructions listed below to ensure reliability of the heating system and safe
operation of the original system:
- specify in detail the connecting points of the newly added system to the original one. Agreements with
the company may be obtained if necessary;
- determin a rational arrangement for piping, avoid neckings and siphonings;
- install proper venting valve (bleeding points) to ensure proper filling of the system;
- supplementary plugs should be installed to ensure draining of the system, if necessary;
- proper insulation should be used to prevent heat dissipation.
-When air heaters are used and when the installation is to be made directly in the cab, make sure that the
engine exhaust system does not touch the added installation (to prevent contamination) and have the
correct warm air distribution by avoiding direct air flows.
-The complete installation should be designed to ensure good accessibility for quick and easy servicing.
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2.11 Installing an Air-Conditioning System
When the installation of an air conditioning system is deemed necessary, it is advisable to use the types
recommended by IVECO.
If this procedure is not applicable, the installation must be carried out in accordance with the supplier’s
instructions and the following points:
-The installation must not interferewiththecorrectoperationofthevehicle components and of equipment
which may be connected with the installation.
-Check the electrical system to ensure that the battery capacity and alternator output is sufficient for the
higher current requirements (see point 2.15). Provide the new circuitry with a protection fuse.
-With the agreement of IVECO, establish a method for installing the compressor, if fitted on the engine (see
point 4.5).
-Trace pipe and cable paths, the location of brackets and hoses bearing in mind that the overall dimensions
and heat affect the various units on the chassis. Avoid runsand arrangements that could lead to hazards when
the vehicle is running. Use shields or armouring if necessary.
-The complete installation should be designed to ensure good accessibility for quick and easy servicing. At
vehicle delivery, the bodybuilder will supply all service and maintenance instructions which are deemed
necessary.
Furthermore, according to the system operations:
a) Equipment installed inside the cab
-The condenser should not impair the original engine cooling system features (reduction in the radiating area
oftheengineradiator).
-The best arrangement is for the condenser not to be combined with the engine radiator but in a separate
compartment, suitably ventilated.
-The arrangement of the evaporator-blower unit in the cab (if not anticipated by IVECO) should be designed
to make sure that the accessibility control and operating equipment is not impaired.
b) Equipment fitted on the cab roof
-When the equipment (condenser, evaporator, blower) is fitted on the cab roof, make sure that its mass is
not higher than that permitted for roof installation.Furthermore, the bodybuilder should providefor proper
reinforcement to the roof frame if necessary, in relation to the mass of the unit and the extent of the
modification introduced (see point 2.12.).
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Chassis modifications
2.12 Cab Modifications
2.12.1General Specifications
Any work on the driver’s cab must be authorised previously by IVECO.
Modifications must not prevent operation of the control devices located in the area affected by the
modifications (e.g. pedals, linkages, switches, pipes etc) or alter the strength of the load- bearing elements
(uprights, reinforcement sections etc.). Due care must be taken when carrying out work that may affect the
cooling system and air inlet pipes of the engine.
The variations in the weight of the cab as well as its different depth must be considered when positioning the
payload, in order to ensure correct distribution of the permitted weights on the axles (see point 1.2).
For o perations that require the removal of sound deadening panels or internal protective elements (panelling,
padding) restrict the removal to the absolute minimum, taking care to restore the protective elements to their
original condition, ensuring the previous operating capability.
Controls and equipment (power take-off engagement control, external operating cylinder control etc.) may
be fitted in the cab provided that:
-They are positioned rationally, properly and are easily accessible to the driver.
-Safety, control and warning devices are fitted which meet the requirements of use and safety of the vehicle
and its equipment as well as the requirements of national legislation.
Ensure that the pipes and wires are correctly positioned particularly when the cab is tilted. Use the necessary
fixings taking care to observe the appropriate distances from the engine, heat sources and moving parts.
Provide the necessary protection from corrosion for all modifications to the structure (see point 2.1.3.).
Ensure that the seals are fitted correctly and apply sealant to those areas which require it.
Ensure that a perfect seal is provided against the infiltration of water, dust and fumes.
The b odybuilder must check that after modification, the cab satisfies legal requirements regarding both the
inside and outside of the vehicle.
2.12.2 Roof Panel Modifications
Installation and modification work to achieve specific refurbishments must be carried out with great care
to safeguard the strength of the cab and ensure that its operation and protection are maintained.
When fitting assemblies or systems onto the roof (e.g. air conditioning systems, spoilers, top- sleepers), check
that the weight of the appliance does not exceed that permitted for the cab. These limits will be provided upon
request depending on the assembly or system to be fitted.
The cabs are provided with anchorage points along the roof sides (8 points for normal cabs, 10 points for crew
cabs) having threaded holes M8X1 protected by appropriate plastic plugs.
Should it be necessary to make an opening to form a roof compartment, ensure that:
-The connection radii are not less than 50 mm.
-Do not modify any ribs that may be present.
-Do not change the curvature of the roof.
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2-61
2.12.3 Installation of a Spoiler or a Top-sleeper
Upon request, the various versions designed by IVECO can be delivered with relevant instructions for
installation. It is recommended that these versions are used as they are specifically checked.
The installation of other versions will be carried out in the same way as prescribed for the original ones by using
the anchorage points placed on the roof sides resting on devices of adequate dimensions. Moreover, the
instructions of the manufactures of the add-on assemblies are also to be met.
Their positioning must not impair the correct operation of the engine air intake system when this is placed
behind the cab.
Whenever national regulations require it, these installations will be inspected by the responsible agencies.
2.12.4 Crew Cabs
When making crew cabs, cabs for special vehicles, for municipal use, fire fighting etc. check whether the cab’s
suspension requires uprating due to the increase in weight, also taking into account any extra seating
arrangements made. Before work of this type can be started on tilting cabs, IVECO’s approval is required to
confirm whether the original suspension, tilting and locking devices are suitable.
As a rule, solutions equivalent to those designed by IVECO for similar versions may be adopted.
In order to help preserve the integrity and rigidity of the cab, we recommend that, as far as possible, the rear
structures are kept intact. The cut may be made at the side, taking care that the door opening remains intact.
The bodybuilder must make the necessary connections to the load- bearing structure, comprising the
longitudinal runners and uprights and connect the new floor to the existing structure. Provide inspection panels
if necessary.
Take particular care when preparing the surface of the elements to be welded by applying a zinc primer, taking
the necessary precautions to ensure that the primed surface is properly prepared for subsequent painting (see
point 2.1.3).
Whenever the cab has to remain of the tilting type, the following points will be taken into consideration
depending on the increase in cab weight:
-Modify the hydraulic tilting devices.
-Restore the cab locking devices.
-Decrease the tilting angle.
-Adapt the suspension.
For the cab tilting system, a cylinder of greater capacity with relevant resting devices can be installed or a
supplementary one fitted taking care to maintain the required clearance from the adjacent components.
The area affected by the thrust of the hydraulic devices must be such to avoid an excessive concentration of
stress. For this purpose ensure that:
-The lifting points are positioned as far back as possible.
-There are suitable anchorage points both on the cab floor and vehicle chassis.
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Chassis modifications
If the tilting cab exceeds the upper point of equilibrium, ensure that the added hydraulic device enables the cab
to be held in the end-of travel, if it does not, fit a safety cable.
Adopt the necessary measures to ensure that the cab locks properly on lowering.
The original cab safety lock and warning light arrangement must remain unaltered.
The cab suspension system must be adjusted to suit the added weight and new dimensions. This must be done
rationally without affecting the normal movements of the cab.
When working out a suitable cab suspension system, the following points must be observed:
-The cab’s attitude, designed for the standard vehicle, must not be altered.
-The added part with its weight must not affect the original portion of the cab with its suspension.
-Ensure normal oscillation of the cab along the vertical, longitudinal and transverse plane.
If the cab has to be converted to a fixed cab, use similar suspension systems as those used on tilting cabs. Take
care to provide a removable cowling, hatches and panels to enable inspection and maintenance work on the
parts underneath.
To ease workshop operations we recommend that a rear anchorage point be provided for lifting, or that it
should be possible to fit a safety bar.
A cab modification may affect components such as the air inlet and filter. Using standard parts fitted to other
models such as sleeper cab variants may offer a good solution and enable legal requirements to be met.
Precautions
Modifications of this type influence the operation and safety of the vehicle (suspension, tilting operations)
which means that they must be carried out carefully and undertaking all the necessary steps to ensure safety.
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2-63
2.13 Changing the Size of the Tyres
IVECO’s approval must be sought prior to replacing the tyres with others of a different size of load capacity
from those which were approved at the time the vehicle was homologated.
Changing the size of the tyres may involve replacing the wheels with others of a correspondingly greater loading
capacity. In this case check whether the spare wheel carrier needs to be changed.
Mounting tyres of different sizes or types of construction on the same axle is prohibited.
Changing the size of the tyres may affect the ground clearance of the rear underrun guard, therefore the
compliance with the national legal requirements must be verified. Its supporting brackets, where necessary,
may be replaced with other appropriate, type-approved brackets.
The use of larger tyres always necessitates verification of the safety margins for the mechanical parts, wheel
arches etc., under all dynamic conditions of steering and bump travel. In certain cases the use of wider tyres
may entail a check on the axles to assess the space required for the suspension components and the length
of wheel studs etc.
Inthecaseofheavyvehicles,caremustbetakentoremain within the limits set for overall width by the various
government regulations.
The use of tyres with a different outside diameter affects the performance of the vehicle in terms of speed,
maximum gradability, pulling force, braking power etc. The tachograph must be recalibrated by an authorised
workshop. The load capacity and the relative reference speed must always be compatible with the performance
of the vehicle. When the tyres with a load capacity or speed limit are chosen for a given vehicle, the permissible
loads of the vehicle or its performance, must be reduced accordingly. On the other hand, the use of tyres with
a greater load capacity does not automatically increase the maximum permissible mass on the axles.
The size and load capacity of the tyres are established on the basis of international and national norms (ETRTO,
DIN, CUNA etc.) and are listed in the manuals of the respective tyre manufacturers.
Specific performance characteristics may be established by government regulations for special use in the case
of fire-fighting vehicles, vehicles for winter duty, airport tankers, buses etc.. Whenever so required by
government regulations the vehicle must be presented to the respective government agency for inspection of
the parts that have been replaced and entry of the respective modifications in the vehicle documents.
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Chassis modifications
2.14 Modifications to the Braking System
2.14.1 General Specifications
The braking system and its components are very important to traffic safety and
vehicle dependability.
Modification to equipment such as governor, brake and control valves, brake
cylinders, load apportioning valve etc. are not permitted as these parts are held to
be safety elements.
Any modification to the braking system (modifying pipes, adjusting or replacing the load apportioning valve,
fitting additional operating cylinders etc.) requires our authorisation. This does not apply to the installation
of an air drier carried out by IVECO.
For new equipment we recommend the same make as those fitted to the original vehicle.
When required by national regulations, the vehicle must be submitted for testing to the respective authority.
In the event of the regulating valves, air drier etc., being moved, reinstate the same type of installation as
originally envisaged, verifying correct operation. In addition, operations carried out on the air drier must not
affect cooling of the air supplied by the compressor.
EuroCargo T
ECTOR vehicles
Repositioning the Brake Fluid Reservoir is permitted provided it is not moved more than 200mm from its
original position and also its vertical position on the sidemember remains the same.
2.14.2 Brake Pipes
When the wheelbase or rear overhang of the chassis are modified, the brake pipes concerned must be
replaced by a single length of new pipe. Where this is not possible the connectors used must be of the same
type as those used originally on the vehicle. When replacing observe the minimum internal dimensions of the
existing pipes.
Pipes must never be welded.
The new pipes must have the same characteristics and be of the same material as those used originally on the
vehicle. The installation must be carried out so that the piping is protected and the correct function of the
system ensured.
For the supply and fitting of material we recommend that you contact our Service Centres or specialised
workshops.
Metal Pipes
For the hydraulic system pipes and those between the air compressor and adjustment units, any additions
and replacements must be as follows:
-Brake pipes (material, size, connectors): according to ISO 4038 Standard
-Compressor pipes (material, size, connectors): according to DIN 3901
-Curvature radii (referred to pipe centreline): minimum 2 x outer dia.
When fitting new pipes or replacing others, plastic must not be used for the following:
-in areas where the temperature inside/outside the pipe could exceed 80°C (e.g. closer than 100 mm to the
engine exhaust system).
-between fixed and moving parts, in this case special hoses are to be used
-on the hydraulic lines.
During modification the following must be observed:
-Material and dimensions: Standard DIN 74324 (Iveco Standard 18-0400, 18-2715)
(max. operating pressure 11 bars)
-Radii of curvature: min. 6 x outer dia.
(referred to the pipe centreline)
Preparation and installation (Iveco Standard 17-2403)
Cut the pipe at right angles (max. permissible variation 15°) using thecorrect tools to avoid flaws which could
impair tightness.
Mark the portion of the length L (see Fig. 2.26) to be inserted in the connector with indelible ink or adhesive
tape to ensure tightness. Mark thepipe to avoid confusion while it is being installed for subsequent
modifications.
Figure 2.26
End of stroke
mark
dmm
Marking
10
12
16
Lmm
6
8
19,8
20,5
24
25
27,1
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Chassis modifications
As a rule quick coupling connectors should be used. We recommend that the same makes present on the
original vehicle be used. When necessary (e.g. near bends), connectors with metal inserts may be used. Before
inserting the pipe into the connector the latter must be screwed into its threaded seat on the component (e.g.
pneumatic valve) adopting the tightening torques indicated below.
ThreadTightening torque (Nm ± 10%)
M 12 X 1.,5 mm
M14X1.5mm
M16X1.5mm
M22X1.5mm
24
28
35
40
Insert the portion of the length L, previously marked, of the pipe into the connector applying force for 30 to 120
N depending on the dimension of the pipe.
The replacement of the components (valves etc.) is made possible since the coupling and connector may be
internally rotated while screwing or unscrewing.
Precautions
Should piping be replaced, use new connectors. After opening, connectors must not be
reused.
Installation
New pipes must be thoroughly cleaned inside before use (e.g. by blowing through with compressed air).
Pipes must be fixed in their correct position. The fixing elements must go right round the pipe. They may be
of plastic, metal or rubber.
Observe adequate distances b etween the various fixing elements. As a rule a maximum distance of 500 mm
for plastic pipes and 600 mm for metal pipes is applicable.
For plastic pipes, in order to prevent distortion and tension on the connectors when fitting them, take the
necessary precautions when working out on the run and fitting the fixing elements onto the chassis. Flawless
fitting of the fixing element will ensure that the pipes do not rub against the fixed parts of the chassis.
Observe the necessary safety distances from moving parts and heat sources.
When a pipe has to pass through the chassis frame (side or cross members) appropriate precautions must be
taken to avoid damage.
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2-67
A solution which can be used such as a bulkhead connection for a straight or angled run is given in the diagram
below.
Figure 2.27
1Pipe
2 Bulkhead connector
3 Chassis
Important
After completing any work either on the system or the equipment, the braking system must be checked to
ensure its efficiency.
For air systems, build up the pressure to its maximum value. Check for leaks in the areas affected by the work
carried out.
To ensure that the connections have been made correctly, the air reservoir for one axle may be discharged.
This check can be performed by reading the on-board gauge and, by working the brake pedal, by checking the
pressure in the remaining brake section (or sections).
In hydraulic circuits, on completing the work, the normal air bleeding operation must be performed.
2.14.3 Vehicles with ABS Devices
When modifying the wheelbase on vehicles with systems fitted with ABS anti-locking devices (automatic
adjustment of the braking force), the original position of the adjustment modulators in relation to the rear
wheel axle must be maintained. The electrical wires between the sensors on the rear axle and the control unit
and between the unit and modulators must be modified accordingly by using new wires or extensions with
appropriate connectors should there be insufficient length in the originals. Brake pipes upstream of the
modulators must be similarly modified. In systems where the adjustment devices act only on the live axle, keep
the original position of the control assembly (sensor, unit, modulator), in relation to the rear wheel axle,
unchanged.
When fitting an additional axle on vehicles with a Category 1 ABS system (adjustment on all wheels), the braking
force on the added axle must be suitably adjusted. Given the various types of axles available on the market,
featuring different solutions for the suspension, braking systems etc., it is not possible to provide the necessary
general information. The solution to be adopted therefore, must be assessed for each individual case by
consulting IVECO and the supplier of the ABS system.
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Chassis modifications
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