Right Weigh 310-PP Series User manual

ONBOARD LOAD SCALE
EXTERIOR ANALOG |310-PP 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)
[email protected]
www.rwls.com/how-to-calibrate-install/
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

These parts are included in the 310-RK (Retail Kit) products and are sold
separately in the 101-SK kit:
PARTS REQUIRED
4
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
Male Elbow Tube Fing for 1/4” Air Line
Tubing size to match the male straight air line
fing. 1/4“ NPT to match the thread size of
the fing at the boom of the load scale
1/4” Air Line
The amount of air line needed depends on
the mounng locaon of the gauge

SPECIFICATIONS & OVERVIEW
5
87 mm
7-¼”
184 mm
208 mm
Technical Specificaons
Operang/Storage Temperature: -40° F to +185° F (-40° C to +85° C)
Enclosure: Black Polypropylene
Gauge Size: 3.5”
114 mm
114 mm
406 mm
The 310-PP 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
310-30-PP
310-54-PP
*310-HKANT40K-PP
**310-54-RK
310-80-PP
310-16KG-PP
310-25KG-PP
310-30KG-PP
*For use with Hendrickson VANTRAAX HKANT 40K or ULTRAA-K UTKNT 40K air
suspension only
**Packaged kit including air line installaon components

6
The 310 Series gauge comes in a protecve box with a mounng bracket and
hardware. The following steps will walk you through how to correctly mount and
install the scale. 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.
MOUNT SCALE
DUMP AIR FROM SUSPENSION SYSTEM
2
1
Choose a locaon to mount the
scale that is easily accessible and
safe from potenal damage (forkli
posts, re caps, etc.). Mount the
bracket in the chosen locaon using
two bolts to secure it. Install the
gauge box to the bracket using
supplied hardware.
SCALE INSTALLATION
Make sure to use BOTH supplied mounng bolts to secure the
bracket to the vehicle. Using only one bolt can result in a cracked
bracket and the scale falling off the vehicle.
!
!

7
INSTALL NEW 1/4” AIR LINE & FITTING
4
Install a new 1/4” air line and fing
into the remaining port on the tee.
Remove the suspension air line fing from the top of one of the air bags.
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. For more informaon on the parts needed for air line
installaon, see page 4.
Air Bag
Street tee
tting
Air Bag
Air Bag
ROUTE AIR LINE TO GAUGE
5
Route the new 1/4” air line from the tee fing assembly to the gauge.
Secure air line with zip es. Install male elbow tube fing onto the
boom of the gauge. Insert the air line into the fing and ghten the
tube nut securely.
AIR UP SUSPENSION SYSTEM
6
Check for leaks and that all fing connecons are secure.
Pull red push/pull valve to check that air pressure is geng to the gauge.
SCALE INSTALLATION
TEE INTO AIR SUSPENSION
3

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: Pull the red push/pull valve so that it is in the fully open posion.
8: 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: Pull the red push/pull valve so that it is in the fully open posion. View the
load scale to determine the on-the-ground axle group weight.
5: Push the push/pull valve so that it is in the full closed posion.
CALIBRATING
OPERATING AND WEIGHING
PUSH/PULL
VALVE

TROUBLESHOOTING
9
PROBLEM CAUSE SOLUTION
Errac / Inaccurate
Weight Readings
The vehicle is not parked on
a level surface
Park on level concrete ground.
Parking on sloped or banked
surfaces will cause the vehicle weight distribuon to shi
between the axle groups. Addionally, 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 air bags. This will cause the
suspension to have a different air pressure than what is normally
needed to hold up the given weight.
The vehicle’s brakes are on
Release the parking brakes when weighing and/or calibrang.
When the vehicle brakes are set, they could apply addional
pressure or torque on the suspension air bags. This will cause the
suspension to have a different air pressure than what is normally
needed to hold up the given weight.
There is a significant air leak
in the suspension system
Check air lines for leaks. Having a leak 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 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

RETURN POLICY & REPAIRS
11
Return Policy and Authorizaon
Before returning any product, please obtain a Return Merchandise Authorizaon number (RMA#)
by calling Customer Service at 503-628-0838 or e-mailing [email protected]. Include the RMA#
and informaon regarding the reason for the return with the returned product. Shipping costs for
returns must be prepaid by the customer. For your protecon, items must be carefully packed to
prevent damage in shipment and insured against possible damage or loss. Right Weigh, Inc. will not
be responsible for damage resulng from careless or insufficient packing or loss in transit.
An RMA# must be obtained by the original purchaser before any product can be returned. Only
new, unused products may be returned. Installed, used, damaged, modified or customized products
can not be returned for credit. Credit will be issued to the original purchaser aer evaluaon by
Right Weigh, Inc.
Repairs/Replacements
An RMA# must be obtained before any product can be returned. Right Weigh, Inc. will evaluate
returned products at no charge. If Right Weigh, Inc. determines that the returned product is under
warranty it will repair the product or parts thereof at no charge, or if unrepairable, replace it with
the same or funconally equivalent product whenever possible. Right Weigh, Inc. will return the
product at its expense via a shipping method (carrier to be at sole discreon of Right Weigh, Inc.)
equal to or faster than the method used by the customer. Products or parts thereof not covered by
warranty will be repaired or replaced at customer expense upon authorizaon by the customer.
Right Weigh, Inc. will return the repaired product at customer expense via a shipping method
(carrier to be at sole discreon of Right Weigh, Inc.) equal to or faster than the method used by the
customer.

For addional support contact:
Right Weigh, Inc.
[phone]
[phone] - Toll Free (USA ONLY)
www.rwls.com
[email protected]
©2015-2020 Right Weigh, Inc. All rights reserved.
Right Weigh, Inc.
Hillsboro, Oregon USA
PP-003-0000 Revision G
September 2020