Air Weigh LoadMax User manual

LoadMaxx™On-Board Scales
TRACTOR SCALE SYSTEM
Self-Weighing Truck and Trailer Scales™
Calibration and
Operations Manual
for Tractors with a Hydraulic Lift
MODEL 5809
PN: 901-0121-000 R4

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Table of Contents
LoadMaxx™ On-Board Scales.....................................................1
MODEL NUMBER NOTE ...............................................................5
I. LOADMAXX TRACTOR SCALE SYSTEM OVERVIEW...........5
I.A. Scale Display Overview ......................................................7
II. CALIBRATION ..........................................................................7
II.A. Preliminary Considerations ................................................8
II.B. CALIBRATING THE TRACTOR SCALE OVERVIEW .......9
II.D. MANUAL CALIBRATION PROCEDURE...........................9
II.D.1. CALIBRATING EMPTY WEIGHTS ..........................10
II.D.2. CALIBRATING HEAVY WEIGHTS...........................11
II.E. Calibration by Direct Entry of RATIO and OFFSET.........12
III. OPERATIONS ........................................................................12
IV. FUNCTIONAL OPERATIONS ...............................................12
IV.A. Weight Displays..............................................................12
IV.B. How-To-Weigh instructions.............................................13
IV.C. Creating a PIN................................................................14
IV.D. Alarm Function ...............................................................14
IV.D.1. Alarm Function Programming Procedure................15
IV.D.1.a. ALARM WEIGHTS...............................................15
IV.D.1.b. TURNING THE ALARM FEATURE ON OR OFF15
IV.D.2. Using Alarm 2 For Steer Axle Underweight ............16
IV.E. LANGUAGES .................................................................16
IV.F. DISPLAY BACKLIGHT AND SET-UP ............................16
IV.G. LARGE CHARACTER DISPLAY....................................17
V. QUICK REFERENCE MENU DIRECTORY............................18
VI. MENU OPERATIONS AND DEFINITIONS ...........................19
WEIGHTS DISPLAYS ..............................................................19
MAIN MENU.........................................................................19
WEIGHTS.............................................................................19

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ALARMS...............................................................................19
PRINT, SETUP MENU.........................................................19
PRINT MENU.......................................................................19
SYSTEM SETUP MENU......................................................19
CALIBRATION .....................................................................19
SYS CONFIG .......................................................................19
SET PIN # ............................................................................19
SYS CONFIG MENU............................................................19
DISPLY SETUP....................................................................19
SCALE TYPE.......................................................................20
DISPLY SETUP MENU........................................................20
WEIGHT SETUP MENU ......................................................20
LBS / KGS............................................................................20
2 OR 3 LINES.......................................................................20
FILTER FREQ......................................................................20
SHOW / HIDE.......................................................................20
BACKLIGHT.........................................................................20
SCALE TYPE MENU............................................................20
MODEL NUMBER................................................................20
DATA/REPORT....................................................................20
MORE OPTIONS .................................................................21
CAN PROTOCOL.................................................................21
INCLINOMETR.....................................................................21
SHOW / HIDE MENU...........................................................21
SHOW GVW.........................................................................21
SHOW STEER.....................................................................21
SHOW HELP........................................................................21
SYSTM STATUS..................................................................21
DIAGNOSTICS: ALARM WEIGHTS MENU........................22
ALRM WEIGHTS..................................................................22

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TEST ALARM.......................................................................22
DIAGNOSTICS: COMLINKS MENU...................................22
A/D READINGS....................................................................22
CALIB DATA ........................................................................22
COMLINK ID ........................................................................22
VII. SYSTEM TROUBLE SHOOTING.........................................23
VII.A. INCORRECT WEIGHT READINGS..............................24
VIII. MAINTENANCE...................................................................25
IX. CUSTOMER SUPPORT.........................................................25
X. Index of Application Notes...................................................26
Limited Warranty.........................................................................27
Procedure for Warranty Claims.................................................28

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In the LoadMaxx Cab Display menus for the 5809 configuration,
the word “DRIVE” and its abbreviations, such as “DRV,” refer to
the hydraulic lift system, which is over the tractor drive axles.
Therefore this manual also occasionally refers to the hydraulic lift
as drive axles or axle group.
MODEL NUMBER NOTE
This guide is intended for use with the sensor configuration represented
by model number 5809.
Configuration
Lift
Trailer
5809
Hydraulic
Drop & Hook: Trailer weight
is available when a trailer
equipped with a calibrated
Air-Weigh scale is attached to
the tractor.
I. LOADMAXX TRACTOR SCALE SYSTEM OVERVIEW
The LoadMaxx on-board scale converts tractor and trailer suspension
loads or hydraulic lift load to an accurate on-ground weight. Once
calibrated correctly, as described in this manual, the scale will display
accurate weights for any load.
The scale will display the actual on-ground weight for the hydraulic lift axle
group to within 300 pounds (140 kgs), given a stable hydraulic system.
For the hydraulic lift, an axle group is defined as the set of axles
supporting the lift.
For any trailer air suspensions, an axle group is similarly defined by the
Height Control Valves (HCV), or leveling valves, on the air suspension.
For instance, a tandem drive axle suspension typically has only one HCV,
so the two drive axles are referred to as a single axle group and the
weight displayed will be for the total tandem weight.
The LoadMaxx scale display can show up to eight axle groups on one
tractor/trailer combination. Once the LoadMaxx is calibrated for weight, it

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is not necessary to recalibrate unless the suspension characteristics
change. For details see “Troubleshooting”.
For best accuracy, calibrate and weigh on a level surface.
To calibrate or weigh the hydraulic lift, you must lift the front of
the trailer slightly to pressurize the hydraulic system. Briefly
release the PTO pressure to stabilize the hydraulic pressure.
Select an easily repeatable weighing position where the trailer
body is raised 6-12 inches.
If calibrating a trailer, release the trailer brakes, to release
suspension binding. Calibrating or observing spring or air
suspension weight readings with the brakes engaged will result
in inaccuracy.
Air-Weigh recommends that the suspension of a vehicle
equipped with air-suspension dump valves be momentarily
exhausted and re-inflated before calibrating or weighing. 5-10
seconds of air dump is normally sufficient. This will improve
repeatability and accuracy.
Any tractor equipped with a LoadMaxx Tractor Scale will automatically
display trailer weight data from Air-Weigh equipped trailers. No re-
calibration or trailer ID entry is required. No special tractor-trailer
connection is necessary, because the Air-Weigh Trailer Scale transmits
weight data over the vehicle’s existing 7-wire cord (J-560). This is a true
drop and hook application.

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I.A. Scale Display Overview
Before using your Air-Weigh Tractor
Scale, it is necessary to calibrate it.
Before starting that process it’s a
good idea to become familiar with the
Scale Display.
Below is a definition of the use of
each button. The function and use of
these buttons remain the same
throughout all operations of the
scale.
I.B. Front Panel Buttons
1. When the Scale Display backlight is off, the first button push turns on the
backlight, with no other effect.
2. Depressing the ESC key (with the backlight lit) changes the Weights
Display to the Main Menu, depicted above. It changes all other menus
and displays to the previous screen. If you are entering a number,
depressing the ESC key clears the numeric entry without changing the
scale’s value.
3. The cursor location on the 5800 is indicated by the blinking line. In the
Scale Display images below, an orange highlight indicates the cursor
location.
4. To change the cursor location, or to set a numeric value, depress the up
or down arrow keys ▲ or ▼.
5. The instruction “Select [some menu item]” will appear frequently in the
text that follows. To select a menu item, depress the ENTER key after
setting the cursor to the specified line, that is, after making the specified
line start blinking.
6. To enter a numeric value, depress the ENTER key after setting the value
to the desired number.
II. CALIBRATION
There are two methods of calibrating the LoadMaxx Tractor Scale. The
usual method is by entering the EMPTY weights into the scale system
when the vehicle is empty, and entering the HEAVY weights into the scale
system when the vehicle is fully loaded. You can also calibrate Air-Weigh
Trailer Scales through the same menu sequence, by using the Tractor
Scale Display keypad.

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When selecting this calibration method, you MUST enter empty weights
when the vehicle is empty and heavy weights when the vehicle is loaded
heavy. Failing to do so will result in inaccurate weight readings.
Alternatively, for those with hydraulic lift systems or suspensions on
several vehicles, it may be more convenient to enter the RATIO and
OFFSET calibration data directly, if these are known.
Use only one of these methods (the usual method, or alternatively, direct
ratio and offset entry) to calibrate the scale.
Once calibrated, if a lift or suspension weight is always incorrect by the
same amount on the empty and heavy weights, it is easy to adjust the
scale to correct it by using the ADJUST function.
II.A. Preliminary Considerations
The accuracy of the LoadMaxx Tractor Scale depends on the accuracy of
the certified scale used to calibrate or check-weigh. Ensure that the in-
ground scale is reliable, recently certified and in good repair. It is
preferable to obtain all weight tickets from the same certified scale. This
ensures comparative accuracy. Segmented scales, those that provide
individual axle group weights, are preferred. When segmented scales are
not available, take extra precaution in calculating weights.
For the best calibration results, the tractor and trailer should be:
Parked on level ground
Full tank of fuel
Tractor brakes released
Engine running
Front of the trailer raised slightly to pressurize the hydraulic
system.
Once the LoadMaxx Tractor Scale is calibrated, it is not necessary to re-
calibrate unless the suspension or hydraulic lift system characteristics
change.
Assigning a PIN number during the system set-up process will protect the
calibration procedure from tampering. Normally a PIN number is not
assigned until AFTER the scale has been calibrated. Air-Weigh Trailer
Scales also have a PIN lock-out to prevent tampering when the trailer is
parked, however any Air-Weigh equipped tractor will still have access to
the Trailer Scale’s calibration function through the in-cab truck scale. See
Section IV.B for PIN information.

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II.B. CALIBRATING THE TRACTOR SCALE OVERVIEW
For Manual Calibration, the EMPTY and HEAVY axle weights must be
entered by the user. When calibrating using this method, the EMPTY
weights must be entered while the vehicle is empty, and the HEAVY
weights must be entered while the vehicle is fully loaded. Failure to
calibrate scales when vehicle is actually empty and when it has a true
heavy load will result in inaccurate weights.
Air-Weigh recommends that both empty and full weights be taken on the
same reliable, certified scale, preferably a segmented scale that will
provide axle weights.
The order of calibration is not important; however, both EMPTY and
HEAVY weights must be properly entered before the weight display is
accurate. Once the calibration procedure is properly completed one time,
the EMPTY or HEAVY weights can be updated or re-calibrated
individually.
Visit our YouTube channel to view our online installation and
calibration videos: http://www.youtube.com/user/AirWeigh
II.D. MANUAL CALIBRATION PROCEDURE
Remember, EMPTY or HEAVY weight calibrations can be entered in
any order, but the HEAVY weights must be entered while the trailer
is loaded, and the EMPTY weights must be entered while the trailer
is EMPTY. Additionally, the scale must have both EMPTY and
HEAVY weights entered before calibration is complete and accurate
weights are displayed.
The following two pages give step-by-step procedures for entering the
EMPTY and HEAVY calibrations, respectively.

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II.D.1. CALIBRATING EMPTY WEIGHTS
1. Press <ESC> one or more times until the Main Menu appears, with VIEW
WEIGHTS blinking.
2. Select PRINT,SETUP, leading to next menu.
3. Select SYSTEM SETUP, leading to next menu.
4. Select CALIBRATION, leading to next menu.
5. Select MANUAL CALIBRATION, leading to next menu.
6. Select EMPTY WEIGHT, leading to next menu.
7. The screen pauses for three seconds with the display, “ENTER EMPTY –
VEHICLE MUST BE EMPTY” before proceeding automatically to the next
menu.
8. On the PICK AXL menu, select one of the offered axle groups: STR
(Steer), DRV (Drive), TRL (if only one trailer) or TRA (Trailer A if more
than one trailer) and TB (Trailer B). The display may also allow choice
from C (Trailer C) up to G (Trailer G). Select DRV for the hydraulic lift.
If PIN is needed for access, enter it at this time.
(See Section IV.C for PIN setup instructions)
9. Using the up/down arrows <>, scroll to the proper empty weight
identified from a certified scale ticket, then depress <ENTER>. The
screen will briefly show Accepted to indicate its acceptance of the Empty
Weight.
10. If one or more trailers are attached, repeat the above steps for the for the
trailer(s). Press <ESC> to return to the PICK AXL menu and choose
another axle for entering its Empty Weight calibration.
11. Some older tractor and trailer software versions will not allow trailer weight
calibration through the tractor scale if the trailer scale has a PIN#.
These must be programmed through the trailer scale or the PIN
temporarily disabled to allow access through the tractor scale.