Maximum bending moment for a frame rail?
point at which the max force is concentrated on a vehicle frame
What frame rails are commonly used on trailer frames?
box and I beam
what frame rail is used on trucks and tractors?
channel
What is the sprung weight?
weight of the vehicle and the load above the suspension
what is the unsprung weight?
weight of the components below the suspension
Where are longitudinal torque rods located?
between upper portion of the axle housing to a frame crossmember
where are transverse torque rods located?
between the frame rail to the axle housing
What is the purpose of a pressure protection valve at the air reservoir on an air ride suspension system?
keeps a minimum safe pressure in the reservoir for air brake operation if needed
how many positions does a ride height control valve have?
3: supply, closed, exhaust
what is the purpose of a two way control valve?
allows driver to exhaust the air springs so suspension can be lowered
the ride height control valve supplies air to the air springs when:
a. load is removed from the vehicle
b. the suspension is in rebound
c. additional load is added to the vehicle
d. the air brakes are applies
c. additional load is added to the vehicle
