Vigia NM 444 HL User manual

A01.01886-8 REV.: 001A01.01886-8 REV.: 001
Automatic Tires
Pressure System
NM 444 HL
Technical ManualTechnical Manual

A01.01886-8 REV: 001 VALIDITY: 28.11.22
GENERAL INFORMATION
Protection of the Environment:
It is very important to be aware, for this we suggest situate the waste according to the local
laws.
SYMBOLS
In this manual, symbols are used to represent di󰀨erent types of information. Each of them is described
below with its correct use:
Important: Failure to comply with these indications may cause in improper handling of the
VIGIA System, causing injury or property damage. Make sure to read these explanations.
Very Important: Failure to comply with these indications may cause damage to people or
things and compromise the operation of the system. Make sure to read these explanations.
Note/Explanation/Observation: Indicates additional information about the use of the
System, its functions and instructions on how to resolve errors.

A01.01886-8 REV: 001 VALIDITY: 28.11.22
TABLE OF CONTENTS
GENERAL INFORMATION ............................................................................. 2
SECTION 1: INTRODUCTION ........................................................................ 3
1.1: PURPOSE AND SCOPE OF THE MANUAL ........................................................3
SECTION 2: ELECTRONIC TIRE CALIBRATOR ........................................... 3
2.1: FUNCTION ...........................................................................................................3
2.2: APPLICATION .......................................................................................................3
SECTION 3: MAIN COMPONENTS ................................................................ 4
3.1: ROTOR SUPPORT ..............................................................................................4
3.2: ROTOR ................................................................................................................5
3.3: INFLATION CONNECTORS FOR TIRES .............................................................6
3.4: IRD VALVE ............................................................................................................7
3.5: ELEMENT TORQUE, ROTOR VALVE ..................................................................8
3.6: BODY COUPLINGS ..............................................................................................8
3.7: CONNECTION BETWEEN BODY COUPLING AND ROTOR ............................12
3.8: NM AIR FILTER ..................................................................................................16
3.9: BLOCKING VALVE ............................................................................................16
3.10: NM 444 CONTROL PANEL ..............................................................................17
3.11: INFLATION MODULE .......................................................................................19
3.12: DEPRESSURIZER MODULE ...........................................................................20
3.13: 2/3 WAY NETWORK SHUNT TO DEPRESSURIZER MODULE ......................20
SECTION 4: TIRE CONNECTIONS .............................................................. 21
4.1: PNEUMATIC DIAGRAM .....................................................................................21
4.2: AIR INTAKE ........................................................................................................27
4.3: AUTOMATIC AIR PURGE VALVE .......................................................................27
SECTION 5: ELECTRICAL CONNECTIONS ............................................... 28
5.1: ELECTRICAL INSTALLATION ............................................................................28
SECTION 6: FUNCTIONING ......................................................................... 29

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6.1: OPERATION .......................................................................................................30
6.2: CHANGES OF STATES ......................................................................................33
6.3: REGULATION OF THE SYSTEM FOR THE CALIBRATION OF TIRES ............35
6.4: INDICATIONS OF LOSSES, DEPENDING ON THE INPUT PRESSURE WITH
REGARD TO THE CALIBRATION PRESSURE ........................................................37
SECTION 7: MAINTENANCE ....................................................................... 38
7.1: AIR FILTER ........................................................................................................38
7.2: DOWNWARD DUCT SYSTEM ...........................................................................38
7.3: HOW TO DETERMINE THE SOURCE OF THE LOSS ......................................38
SECTION 8: FAULT CODES ......................................................................... 39
ATTACHED 1 ................................................................................................. 42
9.1: AUTOMATIC AIR PURGE VALVE .......................................................................42
ATTACHED 2 ................................................................................................. 46
10.1: HOW TO DETERMINE THE CORRECT PRESSURE .....................................46
10.2: SUGGESTED MINIMUM PRESSURE TABLE .................................................47
10.3: TIRES NOMENCLATURE AND ALAPA TABLE OF 2021 .................................49
10.4: CHECK LIST CONTROL ..................................................................................55

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SECTION 1: INTRODUCTIONSECTION 1: INTRODUCTION
Using the wrong tire pressures has a signicant
negative impact on a vehicle's operational ability,
from increased tire wear and fuel consumption
to soil compaction and increased driver fatigue.
Driving with the proper tire pressures for load,
speed and road conditions, maximizes vehicle
mobility and performance in demanding terrain
and conditions, reduces overall operating costs,
improves fuel consumption, increases traction
and safety.
1.1: PURPOSE AND SCOPE OF THE
MANUAL
This manual explains how to install and repair
the VIGIA NM 444 ELECTRONIC TIRE
CALIBRATOR, but also includes a basic overview
of system components and operation. It also
provides the necessary information on installation,
full system operation, and troubleshooting.
SECTION 2: ELECTRONIC TIRESECTION 2: ELECTRONIC TIRE
CALIBRATORCALIBRATOR
2.1: FUNCTION
The system allows you to calibrate the tires to a
preset maximum or minimum cold pressure, per
circuit, optimizing the tire pressure with respect
to the load and speed of your vehicle.
2.2: APPLICATION
The VIGIA NM 444 System is particularly useful
when installed on heavy transport vehicles and
especially those that are exposed to di󰀨erent
types of roads (including o󰀨-road) and conditions
of use including agriculture, livestock, forestry,
transportation fuel, mining and construction.
Very Important: The NM 444 System
can be installed in any unit that has
an air compressor and a power
supply voltage of 12 to 24 V., but its
correct operation will depend on:
• The capacity of the unit's air com-
pressor.
• The number of tires to be con-
trolled in the two pressure states.
• The pressure values at which it is
required to calibrate the tires.
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SECTION 3: MAIN COMPONENTS
Functions and features of the main system components are described below. The following image shows
the approximate location of each component.
3.1: ROTOR SUPPORT
3.1.1: SPECIFIC SUPPORTS FOR FRONT AND
SIMPLE AUXILIARY AXLES
This element is used in units that, on the steering
and/or auxiliary axle, have an iron or aluminum
disc rim.
3.1.1.1: Installation procedure
a) Remove two nuts diametrically opposed.
b) Put the corresponding mounting.
c) Tight correctly the nuts.
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Very Important: If the rim is made
of aluminum and the hub of the unit
has iron rim bolts, replace them with
longer bolts.
3.1.2: UNIVERSAL ROTOR SUPPORT FOR
DUAL AXLES (WITHOUT REDUCING HUB)
These brackets are used in dual axles without
reduction hub that have an iron or aluminum disc
rim.
3.1.2.1: Installation procedure
a) Remove four nuts diametrically opposed, two
for side.
b) Put the corresponding mounting.
c) Tight correctly the nuts.
Very Important: If the rim is made
of aluminum and the hub of the unit
has iron rim bolts, replace them with
longer bolts.
3.1.3: UNIVERSAL ROTOR SUPPORT FOR
DUAL AXLES (WITH REDUCING HUB)
These brackets are used in dual axles with
reduction hub that have an iron or aluminum disc
rim.
3.1.3.1: Installation procedure
a) Replace the bolts or nuts indicated for each
brand and model with the studs provided.
b) Put the corresponding mounting.
c) Tight correctly the nuts.
Very Important: Do not use aluminum
rotor supports.dllllllllllebido a podrían
no soportar e--
3.2: ROTOR
Its function is to allow air to pass from a stationary
point on the truck body to the rotating tyres.
3.2.1: INSTALLATION PROCEDURE
No matter the mounting used, the rotor must be
tightened with a moderate torque of approximately
6 ft-lbs. or 8 Nm.
Explanation: The rotor output ter-
minals must be oriented towards the
ination valves, to prevent the ination
connectors from rubbing against the
hub or the rim.
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3.3: INFLATION CONNECTORS FOR TIRES
Its metallic ends are free (they do not have a valve)
and allow the passage of air in both directions
(from the rotor to the tire and vice versa).
For its application in external tires of dual axles, it
must be complemented with "U" or "L" connectors.
3.3.1: INSTALLATION PROCEDURE
a) Correctly clean, with a tap, the external thread
of the original valve.
b) Remove the internal stem of such valve.
Very Important: If the original valve
of the internal tire has an extension, it
must be removed to avoid possible air
leaks or breaks in the original valve.
Explanation: To thread the valve con-
nector to the internal dual tire, use a
steel reinforced arm. To adjust, use
the INFLATION VALVE WRENCH.
c) Screw on the VIGIA connector, gently tightening
a torque from 2 to 3 lbs. per ft. (2.7 to 4 Nm) with
a wrench.
Very Important: The VIGIA valves
must not rub against the rims and/ or
wheel hubs.
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3.4: IRD VALVE
As indicated by its initials, it allows ination, retains
air when disconnecting a tire or depressurizing the
network, and allows deation when switching from
Loaded to Unloaded state.
3.4.1: CONNECTING THE VALVES TO THE
ROTOR
Note: On front axles with a decorative
ring, make two holes in its wing and
place rubber grommets to prevent the
edge of the metal sheet from dama-
ging the Push-lok hose.
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3.5: ELEMENT TORQUE, ROTOR VALVE
14 Nm
8 Nm
de 25 a 31 Nm
2.5 a 4 Nm
3.6: BODY COUPLINGS
VIGIA o󰀨ers di󰀨erent models of body couplings.
These couplings include a supplement that can
be placed either inside or outside the body, fender
or other mounting part, according to the molding
they have.
3.6.1: INSTALLATION PROCEDURE
VIGIA o󰀨ers several models of body coupling
mountings designed to prevent extending beyond
the vehicle’s body or to avoid perforating fenders,
body or cabin. Make sure the tyre does not rub
against the mounting, even in extreme situations.
3.6.1.1: Steering axles
3.6.1.1.1 Units with cabin and/or fenders with
internal reinforcement (or wing)
a) Align the steering wheels parallel to the body.
b) Hold a plumb line from the fenders, so as the
vertical line passes through the center of the rotor.
c) Make a mark on the fender or bodywork 50 to
90 mm (2") backwards from the vertical plumb.
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