Hydraulic brake fluid

[RanchoT]

I own a 1997 beaver motorhome with a rear Cat engine on a Magnum chasiss which has an air over hydrolic brake system. I am intersted in learning the right type of hydrolic fluid to add to my reservoir. There seems to be several types on the market and I don't know if any of them is harmful to my system.

Can anyone tell me what I should be using? John ar RanchoT@msn.com

[Skip426]

The main differences , in brake fluids , is their formulation to increase the boiling temperature. If you are doing a complete system flush, I'd go with the fluid with the highest rated boiling temps.
Because you don't know what is currently in the system , and you don't want to add some brand that would lower the boiling point of the existing fluid, I'd go with the highest rated ( boiling point) fluid for top up too.

[96 Wideglide]

Fluid type is'nt marked on the fill cap ?