jackgilliat
Mar 16, 2014Explorer
Motorhome sway
My 40 Foot Class A after a long sweeping right turn and an immediate left turn at 20 mph almost rolled over. I've made many left turns at a greater speed without that reaction.
jackgilliat wrote:
I started a repair business in 1965, retired and sold in 2002. I have not repaired a motor home air suspension system since but at that time considered them to be unsafe. I hope that motor home companies will respond with detailed information about any air suspension improvements.
Please let us have a polite constructive discussion that might help us be safer.
Has anyone ever seen a 40 ft motor home with large tires on the front and smaller tires on the back. I did and asked the owner why. He said the factory recalled it because the front tires were defective.
They were replaced at no charge. I asked if the replaced tires were exactly the same as the tires still on the rear. He said yes. His motor home has two front height control valves and one rear height control valve (tripod system). I found a newer motor home the same as his and climbed under. As I expected the height control valves were two on the rear and one on the front (tripod system).
On a hot sunny day, a motor home traveling east on an asphalt highway with a 10mph wind from the south entered a right turn cloverleaf. It was towing a small vehicle with it's own braking system. The motor home was equipped with tripod air suspension, two height control valves in the front and one in the rear. At the end of the cloverleaf the traffic light turned red and while stopping, the left front tire blew. I believe it blew because of the left front height control valve causing it to carry more weight than it was designed to do, particularly in the turn and braking at the same time. Also, if the towed vehicle had an empty vacuum booster or for some other common reason was not functioning, it could have further pushed up the rear of the motor home.