I was returning from a 2500 mile trip with our 1999 Alpine Coach when my brakes failed less than a mile from my house. A quick inspection showed fluid leaking profusely from the left rear wheel. My wife got into our toad and we used the toad brakes to crawl that last mile.
The next day I pulled the left rear and front wheels and was shocked at what I saw.
The inboard pad on the left rear caliper was totally gone and the pistons were ground down to the point that fluid was flowing directly out of the cylinder. From the pictures it is fairly clear that the metallic pads were very corroded.
My theory is that the corrosion on the caliper caused most of the breaking pressure to come from the inboard pad and it finally disintegrated. I had been judging the pad wear by looking at the front pads. The lesson learned by me is to inspect all wheels and lube the calipers on a regular basis.
When I inspected the front caliper and rotor, I was also shocked to see 2 large cracks that went completely through the outboard surface of the rotor.
I purchased this coach a few years ago and had the tires replaced at that time. I asked the shop to check the brakes when they pulled the wheels. They told me the "brakes looked good". My guess is that these problems existed at that time and they didn't even look at the brakes.
I am going to replace the calipers/pads and rotors on all 4 wheels. The caliper casting number is Bendix 4150844
, and the rotor casting number is D6176
. With information on this forum and a lot of searching the WWW, it appears to me that the Bendix part numbers
for fully loaded calipers are L55250LM
(left side both front and rear) and L55250RM
(right side both front and rear). All 4 rotors are Gunite D6176M
(replaces D6176) I would greatly appreciate it if others can verify if these part numbers are correct.
I found these parts listed at a website called Find It Parts Heavy Duty Truck Parts Online, Brake Parts, Light & Medium Duty Truck Parts, Transit & School Bus, Coach, Trailer, Forklift & Semi Parts-Find it Parts
for $107.04 for the rotors and $172.40 for the fully loaded calipers. Please let me know if anyone has done business with this company and if the prices sound good. I found non-OEM parts for considerably less at Ryder Fleet Products Ryder
, so if anyone has experience with them, I would be interested.
I will have to remove the hubs in order to replace the rotors. I assume I will have to at least replace some seals when I do that. If anyone has information on procedures, part numbers, torque specs, etc. to reinstall the front and rear hubs
, that would be very helpful to me as well.
I inspected the brake lines and they all look in good shape. Naturally I will flush and bleed the brakes as part of this job. But, if others have suggestions for other things I should inspect/replace in the process
, that information would also be greatly appreciated.