Polyairs

Hi Rick,
I recall that it's 4psi min (I think it's just enought to keep them pressed against the springs to avoid pinching them).
The max is 30 psi.
Gerry

Did a google search and found the following:-

Polyair Springs - Red Series - minimum 5psi (to stop chafing) & maximum of 45psi.
Polyair Springs - Black Series - minimum 5 psi & maximum of 100psi.

reference url

thanks for that.....

rick.

Sounds like you need to get your hands on the instruction booklet.

The trick with these is to run them at the lowest pressure possible to achieve the desired result. 5 PSI is indeed the maximum. 30 PSI the max.

The procedure is to put 30 PSI in, load the vehicle and then let air out of each side until it begins to sag. Pressure may be different side to side if load is uneven. Do not load the vehicle and then inflate the bags.

The bags are not designed to give you a lift as such, more to prevent a sag.

I have found that with big loads in a Jack and Patrol I have never needed more than 15 PSI to level the vehicle. Too high a pressure does not let the springs work and will simply transfer road shocks directly to the upper spring mounts and chassis.

If you go to
http://www.truckspring.com/airsprings/airlift/app/alappmain.aspwhere I bought mine, you can navigate through to the model you want, then download a factsheet on specs and maintenace etc. My Airlifts are 5psi to 35 psi.
You gotta hand it to these yanks on mail order - you could not want for more information - and they land them here, all up delivered for less than we can buy them locally, AND they still make a profit. BTW, it seems that the Polyairs we buy here are just rebadged Airlift kits - identical. Some forumites here have bought the Firestone version.