4 replies to this topic

[Zami]

Anyone know what type of rubber was used in the making of the hydro bags? Silicon rubber?

[whistler]

Ask Ian Kennedy. https://www.facebook...340758399381783

[mab01uk]

Also lots of Hydrolastic information here in link below which may help:-

https://www.theminif...it-gold-plated/

Edited by mab01uk, 28 December 2020 - 04:11 PM.

[Spider]

Anyone know what type of rubber was used in the making of the hydro bags? Silicon rubber?

 

There was a couple of different rubbers used for the different components. The Rubber for the Spring is described only as ' Natural Rubber of a Highly resilient mix ', I dare say, Dunlops and Moulton likely keep the precise info close to their chest, though I feel it's similar to that used in the Rubber Cones. The Diaphragm that takes the Pressure of the System is a Nylon Reinforced Rubber in to which they molded 2 steel beads, similar to those in a tyre, these are the parts that were crimped into the steel housing of the units.

 

As a side note, these must have cost BMC an absolute fortune to make and fit, even as a mass production item, it's easy to see why Leyland discontinued them. There were extraordinarily well designed and made, given that there is still to this day, so many units still working well, the most common cause of failure seems to be rusting of the steel barb that the hoses are crimped on to.

[Zami]

Thanks everyone for the input.