Air bags

Mine too. They were Airbag Man Coil Rite (Firestone) and Polyair, on different vehicles, both inside coil springs. Same instructions for both.

A HJ61 won't use Coil Rite or Poly Air bags though. That pressure would only be to seat the bags.
With a bellows bag, 30psi or 50psi or more pressure will be deflated to the same pressure as if you simply initially inflate to re establish the original ride height. Over inflating would achieve nothing.

Agreed, RMD. I overlooked the "pump to max pressure". I didn't do that every time.

I just used to inflate until ride height was a over normal, hitch up the trailer, then deflate to normal ride height.

I think the reason they say max pressure (35psi) is because they also say not to use them to lift the vehicle, so if you misjudge how much you put in you aren’t tempted to add more air to lift it to the ride height.

Shaker
Even if you lose some pressure people have to add airpressure to raise the vehicle. So raising is normal as I see it. Not sure what you mean by misjudging how much you put in. If, when adding the air, if you inflate to same ride height as people do, the pressure will be the same or very close to what it was. If you don't have enough pressure it won't be that high. Physics rules apply, pressure x area = force, ie lift force. Not enough pressure not enough lift.

Unless someone has modified the vehicle and fitted some coil springs somewhere along the rear axle, it has the original leaf springs and therefore, Bellows airbags fitted as I had on mine. There is nowhere you can fit plastic airbags on a HJ61 Landcruiser. Any talk relating to poly airbags is erroneous and not applicable in this case.

Polyair part number 72998 Landcruiser 60 series. I Googled it.

The Polyair bags for the HJ60, come with coil springs, as part of the deal.

Polyair bags - HJ60

Cheers, Ron.

Glen C3?? Has he lost pressure, now? He was Glenn C5 in his original post! [;-)

Cheers, Ron.

They could well be Polyair, they have a catalogue number for the 60s plus Ron above included a link to the actual item.

They could well be bellows type airbags as were promoted by the AirBag Man when 60 series were more popular. Poster didn't say when he bought the vehicle and what is fitted.

I agree with mountainmanand I've been using air bags myself for around 10yrs. The suspension should be set up to support the vehicles weight loaded and with some good shocks to help give a more comfy ride. The tow ball weight of the van as a guide would be around 10% of the vans weight loaded or a bit less if it rides safely. It is very important to have the vehicle and van sitting level when towing.The springs should be able to support the vans weight within reason but if they do sag to much air bags will help level it out mine use to drop 30 - 40mm max after the van was attached to the loaded vehicle but only took approx 28 or 29psi to level it the bags were rated to 30psi max something you should check. If mine needed more air pressure than that the springs would need to be heavier because if one or both bags fail the springs should be able to support it safely.

And its all the rage to built a steel or ally box for the genny...
Or gas bottles or dual batteries
Let alone a spare wheel
On the front of the a frame.

Doesnt matter if you use air bags
You seriously need to check the ball weight fully loaded before even thinking air bags

Weights adds up real quick on the ball coupling