Workbook, Heavy Duty Truck Systems, 6E
Chapter Twenty-Five – Answer Key
1. Technician A says that a shorter Pitman arm will produce more steering angle motion at
the front wheels for a given amount of steering wheel movement. Technician B says that
an advantage of a two-piece drag link is that it is adjustable. Who is correct?
2. Which of the following front-end geometry factors describes the tracking of each front
wheel in relation to the other?
3. Technician A says that too little caster can cause steering wander and poor recovery.
Technician B says that incorrect toe angles cause more front-end wear than all the other
front alignment angles. Who is correct?
4. Which of the following describes the inward or outward tilt at the top of the wheels when
observed from the front of the vehicle?
5. Technician A says that steering axle components should be lubricated every 25,000 miles
(38,625 km). Technician B says that front wheel bearings should be inspected and
lubricated every time the wheel hub is removed. Who is correct?
6. Technician A says that when the toe adjustment is out of specification, leading and
darting can occur. Technician B says that when steering gear total mesh preload is low,
shimmy can occur at highway speeds. Who is correct?
7. Technician A says that manual steering gear would be better suited to a truck in a
linehaul application than in a pickup and delivery application, because steering effort
required is greatest at low-speed maneuvering. Technician B says that all hydraulic
power-assisted steering in current trucks must default to manual steering in the event of
hydraulic failure. Who is correct?
8. Technician A says that the need for hydraulic-assist in a hydraulic steering gear increases
in proportion to the road speed of the vehicle. Technician B says that the highest
hydraulic-assist pressures can be measured when the vehicle is fully loaded and
stationary. Who is correct?
9. A driver reports that his vehicle is producing hard steering. In what sequence should the
following checks be performed?
10. What is the most commonly used size for a heavy-duty truck steering wheel?