Dismounting heavy duty truck tires at a commercial tire shop.
Explication of exemplar movie follows this paragraph.
www.getskillz.com/flattire.mov is a Quicktime(R) video with text track, entirely suitable for use as a learning adjunct in the tire trade. The title of the movie is How to Dismount a Heary Duty Truck Tire.
also at frogojt.com website URL www.frogojt.com/flattire.html
From our application to the United States Office of Patents and Trademarks:
The video track depicts a solid performer skilled in the art of dismounting
heavy duty truck tires, in this case an 11.00x22 tubeless truck-tractor
driver-axle tire mounted on a one-piece aluminum wheel, dismounting a tire
from its wheel preparatory to replacing the tire with a new tire. The
performer handles one tool, known as a beadbreaker, to separate the tire from
the wheel. He performs this task in approximately 25 seconds.
How to Dismount a Heavy Duty Truck Tire is one movie depicting one task, in a
series of movies that together depict the job of replacing eight worn tires
on the two driver axles of a three axle truck-tractor. The job begins with
the task of raising the truck axles above the ground with jacks and proceeds
through the tasks of removing the wheels; rolling the wheel + tire assemblies
to a disassembly area; deflating the tires; removing and discarding the stem
and valve; dismounting the tire from the wheel; remounting a new tire on the
wheel; installation of new valve stem and valve; airing up; installing the
assemblies back on the vehicle; lowering the jacks; and stowing the used
truck tire carcasses.
The audio track is the ambient sound only, encompassing all the mechanical
sounds and background (atmospheric) sound that accompanies the performance of
The text track is in nine paragraphs, as follows:
How To Dismount a Heavy Duty Truck Tire;
Place the longhandled beadbreaker/dismounter and give it a smashing kick to
seat the tines between the tire and the wheel;
Grab the beadbreaker and give it a swift jerk upwards, followed by a long
Here's the tricky part: Step into the wheel with one foot, and with the
other foot administer a swift kick to the tire, near the wheel, to circulate
Brace one foot against the tire, and administer a steady pull on the
beadbreaker to pry the tire over the wheel and toward you;
Note the very swift kick with a light touch that you have to do at this
point. Replay this part of the movie to get this just right;
Break the tire loose from the wheel on the "other" side, then pull and pry
the tire over the wheel;
Bring the beadbreaker straight down hard to free it from the tire + wheel.
Straight down! Don't lean back or you'll go flying;
The following are the applicants' annotations of the text track:
How to ...
the Title of the Video, similar to the titling of any moving picture.
Place the ...
the first step in the dismounting procedure; the text track introduces proper
nomenclature for denotation ("tines", "tire", "wheel" as opposed to "rim" for
example") and annotates the action with vivid expressions to connote, in this
context, forceful (as opposed to delicate) action, for example "smashing"
Grab the ...
a description of the action with vivid terms like "swift jerk" and "steady
pull" annotates the movements or "moves" that the solid performer is making,
during the actual movie frames where the action is being performed
Here's the tricky part ...
the trainee is introduced to meta-information in the text track: The video
track is clearly showing the performer's kick downwards that circulates the
lubricant, but the naive viewer of the movie will not understand this
critical physical step without hinting in the text track.
Brace one foot ...
Note the very swift kick ...
The swift kick goes by in just a few frames; it is easy to miss. The text
track advises the trainee to replay these frames ("... this part of the movie
..."); this hint self-references the playback mode that differentiates
viewing QuickTime(R) movies with text tracks from ordinary television or
Break the ...
Bring the ...
the advice in the text track to bring the tool straight down, "don't lean
back or you'll go flying" is in a vernacular conversational mode of speech
highlighting critical safety information. The video track depicts a
potentially hazardous task, which if performed in the manner of our solid
performer is free of serious injury; the text track has information which can
prevent on the job injury.
this is an attribution and credit that is timecoded to appear at the end of
the movie. By saving the movie file with its last frame showing, the
GetSkillz.com text is displayed when the movie file is being downloaded. The
GetSkillz.com text recalls synecdochically the trainee's familiarity with
Quicktime(R) videos with text tracks, to learn the means methods and
mannerisms for performing a task.
The job of removing and replacing all eight worn truck-tractor driver-axle
tires is comprised of the twelve tasks listed above:
1. Raising the truck axles above the ground with jacks
2. Removing the wheels
3. Rolling the wheel + tire assemblies to a disassembly area
4. Deflating the tires
5. Removing and discarding the stem and valve
6. Dismounting the tire from the wheel
7. Remounting a new tire on the wheel
8. Installation of new valve stem and valve
9. Airing up
10. Installing the assemblies back on the vehicle
11. Lowering the jacks
12. Stowing the used truck tire carcasses.
How to Dismount a Heavy Duty Truck Tire is task 6 in the list above.
How to Dismount a Heavy Duty Truck Tire is exemplary of all 12 task movies
that comprise the job of removing and replacing the truck tires. It is worth
noting that task 9. Airing Up requires OSHA-mandated specialized equipment,
namely a tire cage. Any tire that is being inflated in the shop has to be in
the OSHA-specified cage to prevent serious injury or death to personnel.