Coil Replacement Air Suspension Installation

Airbag Man… Designers and manufactures of airbags and air suspension systems bring your “On-Air!”

A rear coil spring suspension replacement system that will give you leveling control for when you’re towing or carrying additional load.

Fitting airbags to the rear of a Toyota Landcruiser 200 is a relatively simple procedure which involves removing the existing rear coil springs and replacing them with airbags.

The rear coil springs are compressed or shortened using a coil compressor, making them easier to remove.

Both rear shock absorbers are detached from the lower and so to is the rear sway bar.

A hydraulic hoist jack lifts the chassis up from the rear axle which will allow more room to remove the coil springs.

There are no bolts holding the springs in place.

The coil is lifted from the lower spring seat and then maneuvered forward and outward.

Now that the coil springs been removed it’s time to fit the inflation valves and airline tube which will later attach to the airbags once they’ve been fitted.

Two standard tyre inflation valves are fitted to a bracket underneath the rear of the vehicle.

Between where the airbags will be located and the inflation valves, airlines inside and out the protector tubing will be run.

One end of the airline tubing is connected to a push to connect fitting in the top plate for the airbag which is secured to the upper spring seat of the chassis.

Three press studs and a bolt hold the top plate in place.

The airlines inside the protective tubing can now be run back to the inflation valves at the rear of the vehicle.

The airline tube is trimmed to length and then neatly inserted into the push to connect fitting at the back of the inflation valve.

The airbags can now be fitted between the spring seat in the top of the rear axle in place of where the coil springs were previously located.

The airbags can now be inflated manually using an external air compressor.

As the air pressure increases inside the bellows it rolls up the piston assembly.

This action pneumatically lifts the vehicle chassis and body upwards off the rear axle allowing for leveling control and adjustable ride height.

Releasing air from the airbag lowers the vehicle closer to the ground.

Once both airbags have been fully fitted to the rear of the Landcruiser the shock absorbers and sway bar can be refitted to the underneath of the vehicle.

The On-Air system is now complete.

Using manual inflation to raise and lower the vehicle for adjustable ride height.

When towing or carrying an uneven load the Landcruiser can now level up a sagging rear end from rear to front and side to side.

Step by Step Images of the Installation Process