MAXpeedingRods Air Spring Kit Installation Guide

Air Spring Bag Kit List

Mounting Brackets

• 2 x Upper mounting bracket (Left and right)
• 2 x Lower mounting bracket (Left and right)
• 2 x Fastening bracket
• 1 x Inflation valve bracket

Air Spring Bag and Air Line

• 2 x Air spring bag
• 1 x Air line φ6*1 (7M)

All Hardware Kits

• 4 x Carriage bolt 3/8-16UNC*102
• 4 x Hex head bolt 3/8-16UNC*38
• 2 x Hex head screw 3/8-16UNC*19
• 4 x Flat washer M8
• 2 x U-bolt 3/8-16*55-165*120
• 4 x Thick washer φ37*φ10*4
• 2 x 90° Air fitting G1/4-46 (male)
• 2 x Inflation valve
• 1 x Carriage bolt 3/8-16UNC*90
• 16 x Hex flange nut 3/8-16UNC
• 2 x Hex flange bolt 3/8-16*20
• 2 x Zip tie (8*460)
• 6 x Zip tie (190*5)
• 2 x Thermal sleeve (φ10*190mm)
• 1 x Heat shield

Pre-Installation Notice

• This product will not increase the load capacity of your vehicle.
• Do not exceed the manufacturer's recommended weight limit.
• The installation process may require drilling; professional installation is recommended to ensure personal safety.
• All modifications must be installed by qualified personnel and in compliance with your local modification regulations.

Installation Guide

Step 1: Prepare the Vehicle

Raise the vehicle and support it using safety stands so that the axle can be safely dropped away from the frame. The air spring assemblies can then be put into position between the leaf spring and frame. Remove the rear wheels.

Loosen and remove the jounce bumper from the frame.

Remove the brake line bracket on the left side only. Keep the bolt for later installation.

Step 2: Assemble the Air Spring Unit

Assemble the air spring bag with the upper and lower mounting brackets. The upper bracket (1) attaches to the frame, and the lower bracket (2) attaches to the axle. The heat shield is installed on the passenger side only.

Sub-step: Attach Lower Bracket

Install the lower mounting bracket (2) to the axle using the U-bolt (14). Tighten nuts.

Install the fastening bracket (3) to the axle with the carriage bolt (8). Tighten the flange nut (13). A 16 carriage bolt may be needed on the left side.

Sub-step: Attach Upper Bracket

Attach the upper mounting bracket (1) to the frame with bolts, washers (15), and nuts (13). Finally, tighten all bolts.

Step 3: Mount the Assembly on the Axle

Place the assembled air spring unit onto the axle.

Diagram Description: Diagram depicting the placement of the air spring assembly onto the truck's rear axle. The vehicle frame, leaf spring, and axle are shown. The air spring unit is positioned between the frame and the axle.

Step 4: Install Air Lines

Cut the air line appropriately and push the hose into the fitting, then pull back to ensure it is locked in place. Slide the air line protective sleeve over the air line near the exhaust port.

Diagram Description: Diagram showing the air spring bag with a fitting attached. An air line is connected to the fitting, and a protective sleeve is shown covering a portion of the air line.

Step 5: Install Inflation Valves

Install the inflatable valve bracket (5) with a nylon tie in a selected location, usually at the rear of the vehicle. Then install the inflation valves (18) on the bracket. Alternatively, drill a 5/16" hole directly to mount the inflation valve.

Diagram Description: Diagram of the rear of a truck showing the installed air spring system. It indicates the location for mounting the inflation valve bracket (labeled '5') and the inflation valve (labeled '18') on the vehicle's frame or bumper area.

Final Checks

Check Air Tightness

Put some air into the air spring bag, then spray a soapy solution on all connections and valves while checking for exiting air bubbles.

Installation Completed