Week #2 - Suspension Systems (Chapter 26) Flashcards
True or False: A truck with an air suspension system is being unloaded. After unloading the truck, the driver observes that one side rises. This could be caused by a plugged quick-release valve.
True
What device is used primarily to absorb energy and dampen suspension oscillation?
Shock absorber
True or False: A truck recently had both front spring packs replaced. The driver complains that it is difficult to steer the truck straight ahead. This could be caused by installing the caster shims backward.
True (seized pins have to be considered improbably if the spring pack has just been replaced)
True or False: A truck with an air suspension system is being unloaded. After unloading the truck, the driver observes that one side rises. A defective leveling valve could cause this problem.
True
What device is used to control the air in and out of the air springs in an air suspension system?
Height control valve
Which of the following would be the most likely road handling result when a spring pack centerbolt breaks on a front suspension?
a. U-bolt failure
b. hard steering
c. bouncing front end
d. leaf breakage
c. bouncing front end (clamping tension from centerbolt defines leaf spring dampening capability)
What is used to load the leaves in a spring pack under tension to provide its self-dampening properties?
Centerbolt
True or False: A truck recently had both front spring packs replaced. The driver complains that it is difficult to steer the truck straight ahead. This condition could be caused by seized spring pins.
False
What is the function of torque arms on a suspension system? a. to control axle torque b. to adjust alignment to retain axle alignment d. all of the above
d. all of the above
What type of spring is usually mounted on top of heavy-duty truck rear spring assemblies and is used only when a truck is under a heavy load?
Auxiliary spring
When lubing a spring pack assembly, neither the fixed bracket spring pin nor the shackle pin will take grease. What should you do first?
a. Remove the weight from the spring
b. Replace the spring pins
c. Replace the spring pack
d. Change the zerk fitting
a. Remove the weight from the spring
True or False: A spring pack has a single cracked leaf, so the fractured leaf can be repair welded providing it is not the main leaf.
False
Axle alignment on a tandem rear leaf spring suspension is adjusted by what?
a. Adjusting torque rods length
b. rotating the eccentric adjustment bolts
c. neither a nor b
d. both a and b
c. both a and b
True or False: A spring pack has a single cracked leaf, so the spring pack should be replaced as a unit.
True
In an air suspension, what happens to the air in the air bags when a height control valve lever is raised upward off horizontal?
The bag is further inflated
