RIGHT WEIGH 310-M3 Series Onboard Load Scale User Manual

: June 3, 2024
: Right Weigh

Table of Contents

RIGHT WEIGH 310-M3 Series Onboard Load Scale
PARTS REQUIRED
SPECIFICATIONS & OVERVIEW
SPECIFICATIONS & OVERVIEW
INSTALL
CALIBRATE
OPERATE & WEIGH
TROUBLESHOOT A PROBLEM
WARRANTY & RETURN POLICY
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

RIGHT WEIGH 310-M3 Series Onboard Load Scale

WELCOME
Thank you for choosing to drive more and scale less! Here at Right Weigh, we are committed to making our products simple to install and easy to use. If your vehicle conﬁguration is not described in this manual, our technical support team is ready to answer your questions!

IMPORTANT!
Please read the instructions COMPLETELY and thoroughly before installation. Right Weigh, Inc. is not responsible or liable for product failure or vehicle damage due to improper installation. The installation 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 modiﬁcations to the vehicle. Right Weigh, Inc. is not liable or responsible for issues regarding warranties with other manufacturers. This is the responsibility of the customer. If you are unsure about how these installation practices apply to your vehicle, please contact your vehicle or component manufacturer.

PARTS REQUIRED

These parts are sold separately in the 103-SK kit (two of these kits will be required for complete installation):

Male Branch Tee
The tube size should match the existing suspension airline

1/4” Tube to Female NPT
The thread size and type should match the thread size and type of the male branch tee

1/4” NPT to 1/4” Tube Elbow
1/4“ NPT to match the thread at the bottom of the load scale

1/4” Air Line
The amount of airline needed depends on the mounting location of the gauge

SPECIFICATIONS & OVERVIEW

Technical Speciﬁcations

Operating/Storage Temperature: -40° F to +185° F (-40° C to +85° C)
Enclosure: Black Polypropylene
Gauge Size: 3.5”

SPECIFICATIONS & OVERVIEW

The 310-M3 series is designed for use on an air suspension axle group with two height control valves. Within this series, there are diﬀerent products designed for diﬀerent axle group conﬁgurations. Before installation, make sure you have the proper gauge for your application:

Suspension	Gauge – Kilograms (KGS)
Single Axle	310-16KG- M3
Tandem Axle	310-25KG- M3
Tri Axle	310-30KG- M3

***B310-30KG- M3**

For use with large airbags (340mm or larger)

INSTALL

The 310-M3 Series gauge averages the pressure from two airbags on an axle group with two height control valves to give a single axle group weight. This product comes in a protective box and the following steps will walk
you through how to correctly mount and install the scale.

MOUNT SCALE
Choose a location to mount the scale that is easily accessible and safe from potential damage (forklift posts, tire 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.
DUMP AIR FROM THE SUSPENSION SYSTEM
CUT EXISTING AIRLINE
Cut the airline going to one of the airbags in the suspension group to be monitored.
ASSEMBLE TEE FITTING
Choose a tee ﬁtting that matches the size of the existing airline, then install a female NPT tube ﬁtting onto the tee as shown. Use teﬂon tape or equivalent to seal threads, and tighten them securely.
INSTALL TEE FITTING
Insert the cut ends of the existing airline and the new 1/4” airline into the tee ﬁtting assembly as shown. Tighten all three tube nuts securely.
REPEAT STEPS 3-5
Repeat steps 3-5 on an airbag attached to the second height control valve.
ROUTE AIR LINE TO GAUGE
Route the new 1/4” air line from both tee ﬁtting assemblies to the gauge. Secure airline with zip ties.
INSTALL GAUGE FITTINGS
Install and tighten one elbow ﬁtting into one of the ﬁttings on the bottom of the gauge. Install the adapter ﬁtting included onto the other ﬁtting on the bottom of the gauge and install the other elbow ﬁtting underneath as shown. Install airline from each airbag into the ﬁttings and tighten completely.
AIR-UP SUSPENSION SYSTEM
Check for leaks and that all ﬁtting connections are secure. Pull the red push/pull valve to check that air pressure is getting to the gauge.

CALIBRATE

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!)
Using a certiﬁed in-ground scale, obtain a loaded weight for the axle group attached to the gauge.
Park on a level surface. Shift the transmission to neutral and set the parking brakes.
Chock the wheels to prevent unexpected vehicle movement.
Release the parking brakes.
Make sure the Height Control Valves (HCVs) have fully inﬂated the airbags. If needed, brieﬂy dump the air from the suspension and allow the HCVs to reﬁll the system.
Pull the red push/pull valve so that it is in the fully open position.
Using a ﬂathead screwdriver, turn the calibration screw on the dial face until the gauge matches the certiﬁed axle group weight.

OPERATE & WEIGH

Park on a level surface. Shift the transmission to neutral and set the parking brakes.
Chock the wheels to prevent unexpected vehicle movement. Release the parking brakes.
Make sure the Height Control Valves (HCVs) have fully inﬂated the airbags. If needed, brieﬂy dump the air from the suspension and allow the HCVs to reﬁll the system.
Pull the red push/pull valve so that it is in the fully open position. View the load scale to determine the on-the-ground axle group weight.
Push the push/pull valve so that it is in the fully closed position.

TROUBLESHOOT A PROBLEM

PROBLEM	CAUSE	SOLUTION

Erratic / 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 distribution to shift between the axle groups. Additionally, if one or more of the vehicle’s wheels are in a pothole, that could result in additional 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 calibrating. When the

vehicle brakes are set, they could apply additional 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 malfunctioning or broken| If the HCV is not functioning correctly, the air pressure applied to the suspension system could be inconsistent and/or erratic. To test for an HCV problem, acquire a weight reading from the Right Weigh gauge and write it down (refer to gauge operating instructions for proper procedure). Drive the vehicle around the block and return to the same location. Acquire a second reading from the Right Weigh gauge. If the two readings are signiﬁcantly diﬀerent, then the HCV might be malfunctioning.

WARRANTY & RETURN POLICY

Right Weigh is committed to providing quality products that function 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 warrantied to be free from signiﬁcant defects in material and workmanship 3 years from date of purchase. During this time, and within the boundaries set forth in this warranty statement, Right Weigh, Inc. will, at its sole discretion, correct the product problem or replace the product.

This warranty shall not apply to product problems resulting from (1) Improper application, installation, incorrect wiring, or operation outside of the approved speciﬁcations of the product. (2) Accidents, faulty suspension parts or power surges (3) Inadequate maintenance or preparation by the buyer or user (4) Abuse, misuse, or unauthorized modiﬁcation. (5) Acts of God, lightning strikes, ﬂoods, ﬁre, earthquakes, etc. Right Weigh, Inc. assumes no responsibility or liability for any loss or damages resulting from use of Right Weigh, Inc. products.

In no event shall Right Weigh, Inc. be liable for direct, indirect, special, incidental or consequential damages (including loss of proﬁts or loss of time) resulting 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 question. Right Weigh, Inc. reserves the right to make improvements in the design, construction, and appearance of products without notice

Return Policy and Authorization
Before returning any product, please obtain a Return Merchandise Authorization number (RMA#) by calling Customer Service at 503-628-0838 or emailing support@rwls.com. Include the RMA# and information regarding the reason for the return with the returned product. Shipping costs for returns must be prepaid by the customer. For your protection, 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 resulting 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 after evaluation 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 functionally equivalent product whenever possible. Right Weigh, Inc. will return the product at its expense via a shipping method (carrier to be at the sole discretion 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 authorization by the customer. Right Weigh, Inc. will return the repaired product at the customer’s expense via a shipping method (carrier to be at the sole discretion of Right Weigh, Inc.) equal to or faster than the method used by the customer.

SCAN HERE FOR ADDITIONAL RESOURCES AND VIDEOS

https://rightweigh.com.au/manuals-resources/.

Right Weigh, Inc.
Hillsboro, Oregon USA.