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FAQ's - Air Suspension
Question: What's the difference between FULL air suspension and SEMI air suspension?
Answer: The difference between a FULL air suspension set-up and a SEMI air suspension is vast. A Full air suspension is where the original metal springs are removed from the vehicle and replaced with a lot of new parts, plus air springs. A SEMI air suspension kit is fitted in addition to the original vehicle suspension, and therefore assists the original suspension.
Question: What's an air spring?
Answer: An air spring is the rubber bellows (doughnuts) that are inflated to provide the lift and cushioning effect to your vehicles suspension.
Question: Can I fit a semi air suspension kit to my AL-KO chassis?
Answer: There are no kits available for your chassis, we have even been in touch with AL-KO who have confirmed there is nothing available for retro fitting.
Question: How much air pressure should be in the air springs?
Answer: Air Pressure requirements vary from application to personal preference.
However a good starting point is around 40psi for motorhomes, or at the very least enough pressure to get your vehicle level.
Question: Is there anything I should be aware of when jacking up the vehicle?
Answer: Its very important not to allow anyone to raise the vehicle body without releasing the pressure from the air springs. Its okay to raise the vehicle by placing the jack under the axle.

By raising the vehicle body without supporting the axle with pressure in the air springs, will stretch the springs beyond their design specification, thus potentially causing un-repairable damage if done with pressure in the air springs.

Question: Do the air springs improve the ride?
Answer: When the vehicle is loaded, the air springs help the existing suspension carry the load and improve the ride a great deal.
Question: What is the minimum air pressure?
Answer: If you are not going to use your vehicle for several weeks, its recommend the pressures are dropped down to the minimum 5psi.
Question: Do the air helper springs replace the existing suspension?
Answer: No. As the air springs are attached to the existing suspension.
Question: Do the air springs increase the legal payload capacity of my vehicle?
Answer: No. But the air springs will maximize the vehicles existing carrying capacity within the vehicles GVW. They will not enable you to legally carry more than what is stated on the vehicles data plate.
Do not overload the vehicle.
Question: Will the air helper springs stabilize my vehicle?
Answer: Yes, the more air pressure you add the less vehicle movement you get in return.
Question: What's included in the basic kit?
Answer: Nuts, bolts, brackets, air springs, air line and manual inflation valves.
Everything is included for a manual inflation system.
If you want 'in cab' pressure gauge and valves, they are available as an optional extra with the Firestone kits, but they are include with the Airide kits
Question: Can I have different air pressures in each air spring?
Answer: The ability to compensate for off-centre loads is one of the best features of the air spring.
Yes you can have different pressures in each air spring.
Question How do I know if I have ABS brakes?
Answer Basically non ABS vehicles have attachments/levers down to the rear axle. These lead up to a valve block which is connected to the rear brake pipe system. An example can be seen here
Question: Where should I mount the inflation valves?
The inflation valves should be mounted in an easily accessible location.
Firestone recommend placing the inflation valves on or around the rear bumper, but with motorhomes, the location will be different, we've seen then mounted in the step area of the rear access door. However if you have the optional extra gauge and valves, you can mount them inside the drivers door so you can visually check the pressure every time you get in.
Question: If you have any further questions, we'll be only too pleased to answer them

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