Suspension Wheels And Systems Flashcards
What’s the advantage of using a trombone type trailer
The trailer can be adjusted to the length of the load
Name 4 things on the driveline of a tractor you should grease
Driveshaft U joints.
The clutch fork pivots.
The clutch release bearing.
The inter-axle drive shaft slip joint
On a typical highboy frame, side rails are connected to do what 3 things
Increase frame strength.
Provide a place for the attachment of retention chains.
Provide a place for the installation of stakes.
The frame of a heavy on-highway vehicle does not support which part
The wheels
What will a vibration sensor, installed as part of the engine system, do when it senses excessive vibration
Shut down the engine
Shoulder wear on a tire is caused by
Under inflation
What are three types of static seals
I sealant used instead of a gasket. An o-ring used in a brake valve.
A gasket use between two parts that do not move.
The king pin of a trailer is locked into the fifth wheel assembly by backing a tractor up until
The kingpin triggers the jaw to slide into place
Which type of fifth wheel assembly allows front to rear and side to side oscillation
Compensating and double oscillation
Forces acting endwise on a rotating shaft create _________ bearing loads
Axial
What are three advantages of using a sliding fifth wheel versus a stationary fifth wheel
Moving assembly forward allows for better maneuverability.
It’s easier to transfer weight between tractor axles.
The ability to accommodate trailers with different kingpin settings.
Before installing a torque rod bushing it should be lubricated with what type of oil
Vegetable based
A pintle hook must be replaced if the wear exceeds
3/16 of an inch
When installing an aluminum part on to a steel frame you must
Use an anticorrosion compound
Huck fasteners are used to attach components to frames because they do three things
Do not allow any movement.
Are extremely strong.
Do not allow components to flex.
In most cases the length of time a component should be able to operate before failure is determined by the
Equipment manufacturers recommendations
When you connect to two or more semi-trailers connected to a tractor by use of a fifth wheel coupling you have an
A train combination
Which type of tire balancing can be completed with the tire assembly on or off the vehicle
Dynamic tire balancing
If the wheels on a heavy on-highway vehicle are not installed parallel to the frame it will cause
Tracking problems.
Significant handling problems.
Tire scrubbing.
If a vehicle equipped with airspring suspension tends to wander the problem may be
I leaking air spring.
A maladjusted ride height control valve.
Drive axles out of alignment.
The ride height control valve on air spring suspension system maintains the
Distance between the vehicle frame and the axles
The term used to describe when the frame of a vehicle is bent to one side is
Sidesway
Using a breakdown maintenance schedule for a vehicle ,the maintenance is completed
Only when something breaks
After installing a fifth wheel assembly it is important to test and adjust the lock jaws. When testing the kingpin should
Rotate with some resistance
The label on a tube of grease states “premium grease EP3” the number 3 stands for the
NLGI grade
Directional tires are tires that do what
Should be mounted so they rotate in a certain direction for self-cleaning
What are three common reasons for the spring to break on a leafspring suspension
Not enough torque on the U-bolts. The vehicle has been overloaded. There has been excessive spring end play.
What type of Seal is used on heavy duty equipment to keep contaminants out
Exclusion
Give three examples of a van trailer
A livestock trailer.
A bulk material trailer.
A refrigerated trailer.
Placing dual tires with a different section with on a heavy-duty vehicle will do what
Cause one tire to carry more of the load
Forces perpendicular to the axis of a rotating shaft create __________. bearing loads
Radial
What are three things that determine the amount of load that can be connected to a fifth wheel assembly
The vertical load to be carried.
The towed vehicle weight.
The maximum drawbar load.
