Right Weigh 250 Series User manual

ONBOARD LOAD SCALE
EXTERIOR ANALOG |250 Series

WELCOME
2
Thank you for choosing to drive more and scale less! Here at Right
Weigh, we are commied to making our products simple to install
and easy to use. We understand that installaon can vary between
vehicles and yours may not be described in this manual. In any
event, our technical support team is ready to answer your
quesons!
[phone]
[phone] - Toll Free (USA ONLY)
[phone] - Australia & New Zealand
[email protected]
[email protected] - Australia & New Zealand
www.rwls.com/how-to-calibrate-install/
rightweigh.com.au - Australia & New Zealand
FOLLOW US!
IMPORTANT!
Please read instrucons COMPLETELY and thoroughly before installaon.
Right Weigh, Inc. is not responsible or liable for product failure or vehicle
damage due to improper installaon. The installaon requirements are
outlined in this manual and should be followed thoroughly to avoid inaccuracy
or damage to the product.
It is also important to be aware of vehicle manufacturer policies before making
modificaons to the vehicle. Right Weigh, Inc. is not liable or responsible for
issues regarding warranes with other manufacturers. This is the responsibility
of the customer. If you are unsure about how these installaon pracces apply
to your vehicle, please contact your vehicle or component manufacturer.

Parts Requried
Specificaons & Overview
Scale Installaon
Calibraon and Operaon
Troubleshoong
Warranty Statement
Return Policy & Repairs
4
5
6
8
9
10
11
CONTENTS
3

PARTS REQUIRED
4
1/4” Air Line
The amount of air line needed depends on
the mounng locaon of the gauge
PARTS INCLUDED:
Street Tee Fing
The thread size and type should match
the thread size and type of the vehicle
suspension
Male NPT Tube for 1/4” Air Line
The thread size and type should match
the thread size and type of the vehicle
suspension
1/4” Straight Air Line Fing (Female)
ADDITIONAL PARTS REQUIRED:
Parts sold separately in 101-SK kit:

SPECIFICATIONS & OVERVIEW
5
The 250 series is designed for use on an axle group with a single height control
valve suspension system. Within this series, there are different products
designed for different axle group configuraons. Before installaon, make sure
you have the proper gauge for your applicaon:
If you have the wrong gauge for your applicaon, please call our technical
support listed on page 2.
Gauge - Pounds (LBS) Gauge - Kilograms (KGS)Suspension
Single Axle
Tandem Axle
Tri Axle
250-30-LM
250-30-FF
250-54-LM
250-54-FF
*250-HKANT40K-LM
*250-HKANT40K-FF
250-64-LM
250-64-FF
*For use with Hendrickson VANTRAAX HKANT 40K or ULTRAA-K UTKNT
40K air suspension only
250-16KG-LM
250-16KG-FF
250-25KG-LM
250-25KG-FF
250-30KG-LM
250-30KG-FF
LOWER MOUNT
FLANGE MOUNT
3.5”
1.48”
2.21” 2.7”
0.40” 1.69”
0.70”
2.69” 0.27” 1.00”
3.48”
0.83”

6
The 250 series gauge is designed to mbe mounted on the exterior of the truck or
trailer. The following steps will walk you through how to correctly mount and
install the gauge. Be sure to choose a locaon that is easily accessible and safe
from potenal damage (forkli posts, re caps, etc.)
DO NOT mount the scale directly to the chassis or any other main
beam unless it is approved by the vehicle manufacturer. Doing so
may void the warranty with the vehicle manufacturer.
CHOOSE GAUGE LOCATION
VENT GAUGE
2
1
Choose a locaon to mount the gauge that is easily accessible and safe from
potenal damage (forkli posts, re caps, etc.). DO NOT mount the gauge yet.
!
SCALE INSTALLATION
FRONT FLANGE:
Cut a mounng hole of diameter 2 5/8”, or replace an exisng
flange mounted PSI gauge.
DO NOT drill or cut mounng holes in the main chassis or any
other part of the vehicle’s main framework unless it is approved by
the manufacturer. Drilling holes wihtout approval may void your
warranty with the vehicle manufacturer.
!
NOTE:
Right Weigh, Inc. sells a separate mounng bracket (250-BR) that
accomodates both the flange mount and the lower mount gauges. Please
contact Right Weigh, Inc. on page 2 for more informaon.
Open the gauge vent prior to mounng.
The vent is located on the top of the
gauge. Move the yellow pointer to the
open posion.
HEX FITTING
MOUNT GAUGE
3
The gauge must be mounted vercally. DO
NOT mount at an angle or sieways. Always
install (or remove) the gauge using a
wrench on the hex fing. DO NOT
aempt to ghten (or loosen) by turning
the housing or any other part of the gauge.

7
AIR UP SUSPENSION SYSTEM TO
CHECK FOR LEAKS
8
SCALE INSTALLATION
DUMP AIR FROM SUSPENSION SYSTEM
4
INSTALL NEW STREET TEE FITTING
5
Install a new 1/4” air line and fing into the remaining
port on the tee.
Air Bag
Air Bag
Street tee
tting
Air Bag
ROUTE AIR LINE TO GAUGE
7
Route the new 1/4” air line from the tee fing assembly to the gauge.
Secure air line with zip es. Insert the air line into the push-to-connect
fing on the back of the gauge. DO NOT ROTATE THE AIR FITTING!
Insert a street tee fing into the top of the air bag that
matches the thread size of the vehicle suspension.
Reinstall the suspension air line and fing into the
street tee.
6
INSTALL NEW 1/4” AIR LINE
Remove the suspension air line fing from the top of
one of the air bags.
PLACE CALIBRATION / OPERATING
INSTRUCTIONS STICKER
9
Place Calibraon / Operaon Instrucons scker provided on the vehicle in
a locaon that is close to the gauge.

8
1: The vehicle must be fully loaded. For best results, calibrate with a loaded
weight within 1500lbs or 750kgs of your typical axle group weight (DO NOT
calibrate empty!)
2: Using a cerfied in-ground scale, obtain a loaded weight for the axle group
aached to the gauge.
3: Park on a level surface. Shi the transmission to neutral and set the parking
brakes.
4: Chock the wheels to prevent unexpected vehicle movment.
5: Release the parking brakes.
6: Make sure the Height Control Valve (HCV) has fully inflated the air bags. If
needed, briefly dump the air from the suspension and allow the HCV to refill
the system.
7: Using a flathead screwdriver, turn the calibraon screw on the dial face unl
the gauge matches the cerfied axle group weight.
CALIBRATION AND OPERATION
CALIBRATION
SCREW
1: Park on a level surface. Shi the transmission to neutral and set the parking
brakes.
2: Chock the wheels to prevent unexpected vehicle movment. Release the
parking brakes.
3: Make sure the Height Control Valve (HCV) has fully inflated the air bags. If
needed, briefly dump the air from the suspension and allow the HCV to refill
the system.
4: View the load scale to determine the on-the-ground axle group weight.
CALIBRATING
OPERATING AND WEIGHING

TROUBLESHOOTING
9
ERRATIC / INACCURATE READINGS
Below is a list of problems we have seen with a simple fix. If you don’t see
your problem listed here or our troubleshoong doesn’t fix your problem,
call Right Weigh Tech Support listed on page 2 for further assistance!
PROBLEM WITH THE GAUGE?
The vehicle is not parked on a level surface:
Parking on sloped or banked surfaces will cause the vehicle weight
distribuon to shi between the axle groups.
There is a significant air leak in the suspension system:
This could cause the HCV to refill the suspension at regular intervals to
maintain the vehicle’s ride height. If there is a significant leak, the gauge
display will slowly decrease in value and then quickly increase in value when
the HCV refills the suspension system.
The vehicle’s brakes are on:
When the vehicle brakes are set, they could apply addional pressure or
torque on the suspension airbags. This will cause the suspension to have a
different air pressure than what is actually needed to hold up the given
weight.
The vehicle is parked on an uneven or rough surface:
If one or more of the vehicle’s wheels are in a pothole, that could result in
addional pressure or torque on the suspension airbags. This will cause the
suspension to have a different air pressure than what is actually needed to
hold up the given weight.
The Height Control Valve (HCV) is malfunconing or broken:
If the HCV is not funconing correctly, the air pressure applied to the
suspension system could be inconsistent and/or errac. To test for an HCV
problem, acquire a weight reading from the Right Weigh gauge and write it
down (refer to gauge operang instrucons for proper procedure). Drive the
vehicle around the block and return to the same locaon. Acquire a second
reading from the Right Weigh gauge. If the two readings are significantly
different, then the HCV might be malfunconing.

Right Weigh is commied to providing quality products that funcon as
intended, and we always stand behind our workmanship. Our industry
leading warranty is our best effort to express this commitment. Products manufactured
or sold by Right Weigh, Inc. are warraned to be free from significant defects in material
and workmanship 3 years from date of purchase. During this me, and within the
boundaries set forth in this warranty statement, Right Weigh, Inc. will, at its sole
discreon, correct the product problem or replace the product.
This warranty shall not apply to product problems resulng from: (1) Improper applica-
on, installaon, incorrect wiring, or operaon outside of the approved specificaons of
the product. (2) Accidents, faulty suspension parts or power surges (3) Inadequate
maintenance or preparaon by the buyer or user (4) Abuse, misuse, or unauthorized
modificaon. (5) Acts of God, lightning strike, floods, fire, earthquake, etc.
Right Weigh, Inc. assumes no responsibility or liability for any loss or damages resulng
from use of Right Weigh, Inc. products.
In no event shall Right Weigh, Inc. be liable for direct, indirect, special, incidental or
consequenal damages (including loss of profits or loss of me) resulng from the
performance of a Right Weigh, Inc. product. In all cases, Right Weigh, Inc. liability will be
limited to the original cost of the product in queson. Right Weigh, Inc. reserves the
right to make improvements in design, construcon, and appearance of products
without noce.
WARRANTY
10