'94 Bounder with Parking Brake problem.
My rig isn't exactly a 'Vintage RV' yet, just two years to go, but I thought I'd post this here just in case someone with experience with a '94 Fleetwood Bounder, DP, might know something about my problem.
I am hoping someone might have run into this before and have an explanation of how the Parking Brake (PB) system operates.
This is a diesel pusher, and has a Bendix Spring Actuated parking brake system. The brake drum surrounds the drive shaft. The spring is retracted to release the brake when the engine is running (no engine, no brake operation), and the shift lever is moved to 'P'. This operates a hydraulic system that applies the brake, then you shut off the engine.
My problem seems to have been with this RV for a very long time. When I bought the rig in '04, I found I didn't have PB function and on inspection, found that the mechanical adjustment was set about 1" too loose so that the brake pads didn't contact the brake drum. So I adjusted it correctly and had PB for a while. Over the next several years I would occasionally notice that the PB lamp would flicker a little now and then. Even on smooth roads. Then the PB would try to apply while I was backing up. Finally, it started to come on solid (and apply the PB) while I was driving. If I'd throw it down into 3rd, the brake would release and I could go for miles no problem.
Finally, it got to the point that it was coming on most of the time while in 'D', '3' & sometimes '2'. That ruined the brake pads and scored the drum. When I had it worked on, the guys weren't really familiar with the system and did their best to figure out why it was coming on in 'D'. They thought they had it and rebuilt a hydraulic valve assembly. Also turned the drum and replaced the brake pads. It seemed to be OK.
All was well for around 100 miles. Then the 'PB' lamp started flickering again in 'D'. Too far away and short of time, I didn't take it back to the other shop so I'd like to see if I can get some advice on this forum.
I have Fleetwood & Freightliner (was Oshkosh) schematics but they aren't much help as to the LOCATION of whatever switch is causing the problem.
Anyone here have experience with this Bendix PB system? Note that this system doesn't use the 'Rotten Green Switch' so famous for failing in gas rigs. I talked to Old Used Bear (the expert on the PB in gas rigs) and he assured me my system doesn't use that.
Anyone know where I could get an operational schematic of the PB system? The one provided by Freightliner is useless.