volvo jockheere buses
2006-07-30 15:44:58 · 2 answers · asked by sean 2 in Cars & Transportation ➔ Other - Cars & Transportation
"Park" in cars is a little tooth that is moved into a series of spline in the transmission.
Big trucks and buses are to heavy for that kind of parking technique. Typically these vehicles rely on "air brakes" to be set in order to park the rig.
"Maxi cans" have a large spring that is held back with air while driving. When they need to park the driver will normally pull a knob, which releases the air and the brakes engage. The would be a "popping" rush of air sound you hear from these vehicles.
2006-07-30 15:53:32 · answer #1 · answered by Paul 4 · 2⤊ 2⤋
The bus has what they call spring brakes. They operate off of air pressure. When the3 air is released from the spring brake canister the large springs push the rod that is connected to the slack adjuster, turning a "S" Cam that pusses rollers that are connected to the brake shoes and the brake shoes are pressed to the brake drums under tremendous force. The transmission does not need the park because if the brakes are properly adjusted the vehicle will not move if put in gear with the parking brakes applied. Some vehicles have a safety feature and the vehicle can not be put into gar unless the spring breaks are released.
2006-07-30 23:03:07 · answer #2 · answered by Can do it man 3 · 0⤊ 0⤋