Firestone airbags

I run mine with about 50 to 60 PSI as a max with a full outback load, never felt the need to get anywhere near 100 psi.
Don't run them empty I let them down to about 20 psi with minimal load as you have no bump stops and the bags and mounts may take a hammering if you bottom out for some reason..

Also watch the U bolts, I have had one loosen and the bottom mount shift.
I tend to think the U bolts and base mount are a bit light and I will make a new base out of heavy channel and fit it with 3/8 or 1/2 inch U bolts.

Other than that they work real well and make a real difference with the saggy bum syndrome Troopies suffer.

Cheers

Can I suggest you contact STA on the net as he is real expert on the subject?

Rambler,
Fella who fitted mine gave a similar speel. I rang the manufacturer to make sure he didn't miss anything. They said, no less than 5psi, no more than 100psi and I recall someone telling me you should let them down before putting the car on a hoist mounted under chassis?? Can't see why it should be and issue though?

My Troopy is very similar weight and I find around 45psi is good. Having said that I would have different spring packs of different age which have had leaves added and been reset earlier in their life also......so no point going off someone else. Start at 40psi and run around for bit like that and adjust to suit once the leaves have settled again. I'd love the in cab adjuster kit but can't justify the $400 odd it costs. You only need to make tiny adjustments with the compresser/finger as the volume of air is so small it drops and rises so quickly.

Great product and I'll be ripping mine off and putting them on the next one hopefully.

Matt

Rambler, I have mine for a while now and with my troopy parked on flat ground I stand back and look how she sits and adjust as necessary, they need very little air to adjust, very sesitive to pressure.
I also use a measuring tape to measure from the top of the tyre to the top of the wheel arch inside (top of tyre straight up to body) to try to get them the same or you can just stand at the back and look to see if she is level.
The pressure each one is to have will be determind how you pack her...maybe a bit one side more than the other to make sit normal (side and back view).
Keep an eye on the mountings for tightness etc.
But they have been terrific, had no trouble, easy maintenance and used in all sorts of situations and even when towing a 21 ft full van of about 2.8 tons with electric brakes.....great. cheers Phil

Thanks for the advice guys, but also wondering if the bag on the left rear is too close to the exhaust.It is fitted with a shield between the exhaust and the bag but it seems very close to me. It looks as though it is the only place to go and the shield must be part of the kit for the Troopy but it would be piece of mind to hear from others.

Hey John, you didn't say what happens to the bag if the "U" bolts come loose. :>)
The exhaust heat is not a concern, the bag doesn't suffer.
I find the best way to inflate is to pump up with a HANDPUMP and knowing the measurement from the centre of the hub to the mudguard edge will get you to the right level. Measure the truck when it is empty or measure one at a yard.
John carries about 400kg more than mine hence more pressure, mine sits well at 32/35psi. My truck usually weighs in at 3200kg
Also carry your old bumpstops with you in case a bag gets damaged.
Put some threadlock on the "U" bolt nuts.

hi rambler .still waitng to hear who took that photo.maybe you could take photo of new 70 series this time. reards twintrail

Hi Rambler

As the others have intimated these bags are bullet proof. Yes, you should stick within the parameters of 5 to 100psi athough you'll probably find 20-50 psi satisfactory for most occasions. IMHO I think it is best to inflate to a height measured from the bottom of the rim to the top of the wheel arch and in this way maintain normal ride height. If you need more clearance then put more air in. I think the brackets are underdone and like John may beef up the bracketry and fit some high tensile bolts, if I can be bothered that is! John has done some serious rough sh#t with these bags so his comments on this is at the extreme end.
There are a few sites that have heaps of data on these kits (US) and I bought mine from the US and modified accordingly.....not much required and a lot cheaper at the time. Pump em up and enjoy the ride!!

Cheers