Hydro Boost braking ?

[Smallfry]

I have a derelict Unimog. The braking system is assisted by air pressure, like a conventional vacuum servo in reverse. It is not like air brakes on a HGV or PSV.

It has an air compressor, regulator, unloader valve, and a tank and booster (servo), plus the pipework. Most of these things are in a bad way. I would replace them, but they are frighteningly expensive, and I don't have the money these days for a very limited use vehicle.

I cant convert to a vacuum system, because firstly, there is no room for a servo (too big) but more importantly, a vacuum system does not generate enough pressure.

I am thinking about a Hydro Boost system instead. This works on oil pressure instead of air, which is good, as there will be no condensation laying around in components to cause corrosion.

Does anyone have any direct experience of these systems ?

 

[sako243]

The P38s had them as standard didn't they?

 

[8ob]

It has an air compressor, regulator, unloader valve, and a tank and booster (servo), plus the pipework. Most of these things are in a bad way. I would replace them, but they are frighteningly expensive, and I don't have the money these days for a very limited use vehicle.

Anything OEM for Mogs is eye wateringly expensive, the up side is not much on the brakes side of things is made by them. Its well worth stripping what you have and getting the part numbers off the items for cross reference purposes, then get quotes from a truck spares factor.

Bob

 

[barracuda816]

Have a look at if an ibooster would work like from a Tesla. There is a lot on info on the openinverter.org forum. They are used a lot in diy ev conversions.

 

[Barking Mat]

Commer trucks used a vacuum system to actuate* the brake circuit, not compressed air, but brake fluid.

They had a compressor on the engine, the suck side, went through a one way valve, to cause the vacuum.

Clayton Dewandre (spelling ?) rings a bell, but not 100% sure.

I never got it to work, still passed MOT's and I drove it a few thousand miles.

*Well, increase braking power.