RV Repair: 1989 winabago superchief, power steering pump, winabago

Question
how do you bleed the brakes front and rear

Answer
You probably have a very high pressure system.  this is the hydroboost system.  If so, you actually share with the power steering pump.  this can be involved and possible to get hurt.  The system needs to be depressureized.  Cannot start the RV and might have a process to deenergize the system.  I actually would rather not encourage this by telling you the process, because of the terrible possibilities.  If you have ever bled brakes before, you know you start at the furthest from the master cylinder and work your way to it.  That means RR then LR then RF then LF.  Good luck, but maybe you should get some help with this.  You can Google this if you want to.