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Summary of Contents for Air Weigh iWeigh
- Page 1 ® Installation Guide For Trailers Air & Mechanical Suspensions Air-Weigh Customer Support: 888-459-3247 PN 901-0186-000 R1 12/16/24...
- Page 2 Table of Contents Scale Overview.................2 Air-Weigh App................2 Mounting the Scale................3 Mounting Best Practices............3 Mounting the Scale..............4 Connecting Power to the Scale............5 Installation for Air Suspensions............6 Installation Overview..............6 Tools needed - Air Suspensions..........6 Installing the Air Line and Brass T Fitting........7 Installation for Mechanical Suspensions........8 Installation Overview..............8 Tools needed - Mechanical Suspensions......10...
- Page 3 Scale is an on-board weighing system for air-ride and ® spring ride suspensions on trucks, tractors and trailers. The sensors in the iWeigh scale measure the air pressure change or axle flex ® and converts this into a displayed weight that can be viewed on the optional external display or on the Air-Weigh app.
- Page 4 The front face of the iWeigh scale should face towards the tractor. ®...
- Page 5 Drill tapping holes where you have marked and install the installation bracket and scale to the vehicle. As a best practice, the front face of the iWeigh scale should face ®...
- Page 6 ABS system. Locate the ABS system harness. Trace the ABS harness to where the T-breakout connection will be connected. Recommended iWeigh mounting location will be approximately 3 ® feet from T-breakout inside the channel of trailer framing.
- Page 7 Installation for Air Suspensions The scale works using sensors that measure air pressure changes in the trailer’s suspension; it then converts those numbers into weight. The weight is displayed on the trailer display and displays weight per axle group. Weights are accurate to within 300 pounds (140 kilograms) and are displayed in 20-pound or 20-kilogram increments.
- Page 8 7. Slide the air line onto the T fitting as far as it will go. 8. Securely tighten the end cap. Check that the air lines are secure. 9. Route the blue air line to the installaed iWeigh location. Cut ®...
- Page 9 Installation for Mechanical Suspensions Installation Overview Listed below are the components of the scale that you will install: • Sensor interface and extension cables • Deflection sensors (x2) • Brackets (x2) Note: When installing this kit on a three axle trailer, the first sensor is to be installed on the forward facing side of the center axle and the second sensor is to be installed on the forward facing side of the rear axle.
- Page 10 Note: Use the bracket template that has been provided with your trailer kit and follow directions on the template to double check that the bracket will fit. Note: Bracket is installed on the front and rear axles for tandem trailers and on the middle and rear axles for tri-axle trailers.
- Page 11 Tools Required - Mechanical Suspensions You will need the following tools to install the scale and deflection sensors on a trailer with a mechanical suspension. • Standard wrench set or adjustable wrench • Drill with ¼-inch drill bit, or larger if flush mounted •...
- Page 12 Welding the Deflection Sensor Brackets Note: Air-Weigh takes no responsibility for damage or failure of the trailer axle due to improper welding or failure to follow these instructions. 1. Find and mark the center of the trailer axle(s), front and rear for tandems or middle and rear for tri-axles, on the forward facing surface(s).
- Page 13 3. Using a permanent marker, mark the inside circumference of the bracket slots on the axle. 4. Remove the C-clamp and bracket. Remove the paint on the axles to bare metal where indicated by the marker. Make sure there is no paint remaining where the bracket will be welded.
- Page 14 7. Using a MIG or ARC welder, tack-weld the left and right ends of each slot and then weld the entire length of the slot. Do not weld in any other location. Tack weld at these 4 locations After tack welding, make a 1/4 fillet weld around the entire perimeter of both slots 8.
- Page 15 Installing the Deflection Sensors Repeat the below steps for both front and rear deflection sensor install. Note: 1. Use two bolts, nuts and washers to install the deflection sensor inside each bracket. 2. Insert the deflection sensor into the sensor bracket with the engraved lettering facing up and its cable extending toward the side of the trailer where you will route the sensor extension cable from the trailer scale display.
- Page 16 Routing the Axle Sensor Extension Cables 1. Starting at the trailer display, connect the SHORTER sensor extension cable to Port 1 on the sensor interface cable. 2. Connect the LONGER sensor extension cable to Port 2 on the sensor interface cable. 3.
- Page 17 Setting the A/D Values At this point, you have installed both trailer’s axle sensors and routed extension cables. You will next adjust the deflection sensors to read weight correctly by setting the A/D values. A/D refers to the analog-to- digital conversion of the sensor reading. This step will require the use of either the app or the Deflection Sensor Test box (P/N 1001).
- Page 18 Adjusting the A/D Reading The sensor values should range from 750-1250 during install and after the break-in period a reading of 500-1500 is acceptable when empty. Note: When tightening the bolts, ALWAYS torque the nut, NOT the bolt head. The bolt head should be in the bolt head holder, which is built into the bracket.
- Page 19 Final Sensor Torque 1. Torque both nuts to 120 ft/lbs. 2. Apply supplied Loctite to the exposed threads of the bolts. 3. Perform a final check to A/D values using the readings from the trailer scale in the app, not from the A/D Box. If A/D readings are not within range, repeat the Adjusting the A/D reading steps.
- Page 20 Download the Air-Weigh App Download the Air-Weigh app. The home screen will show all Air-Weigh iWeigh and QuickWeigh ® ® scales within broadcast range. Prior to naming your scale, it will show as QuickWeigh or iWeigh and the serial number of your ®...
- Page 21 Using the Air-Weigh App The home screen will show all Air-Weigh iWeigh and QuickWeigh ® ® scales within broadcast range. Prior to naming your scale, it will show as QuickWeigh or iWeigh and the serial number of your ® ®...
- Page 22 Limited Warranty Air-Weigh warrants (the “Limited Warranty”) that the Products will be free from defects in material and workmanship under normal use and service with proper maintenance for the following time periods: (a) for new Scale kits, the Limited Warranty period will be 3 years; (b) for new parts and accessories sold separately, the Limited Warranty period will be 1 year;...
- Page 23 Procedure For Warranty Claims ALL customers should first contact Air-Weigh Customer Support Department at (888) 459-3247 for questions regarding the use, operation, repair or return of any Air-Weigh product. In the event Air-Weigh requests to examine the product prior to disposition OR for repair or replacement, Air-Weigh requires a Return Material Authorization (RMA) number be issued before the item is returned.
- Page 24 1720 Willow Creek Circle • Eugene, OR 97402-9152 USA P.O. Box 24308 • Eugene, OR 97402-0437 USA Telephone (888) 459-3444 Customer Support (888) 459-3247 • Fax (541) 431-3121 www.Air-Weigh.com PN 901-0186-000 R1 12/16/24...
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